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DOE OSTI2020

Materials Data on Pd3(NO)16 by Materials Project

Pd(PdN3)2(N2)2(NO2)2(NO3)4 crystallizes in the tetragonal I-42m space group. The structure is zero-dimensional and consists of eight ammonia molecules, eight nitric acid molecules, four nitrous acid molecules, two palladium molecules, and four PdN3 clusters. In each PdN3 cluster, Pd+2.67+ is bonded in a 1-coordinate geometry to three N+1.50+ atoms. There is one shorter (1.93 Å) and two longer (2.03 Å) Pd–N bond length. There are two inequivalent N+1.50+ sites. In the first N+1.50+ site, N+1.50+ is bonded in a single-bond geometry to one Pd+2.67+ atom. In the second N+1.50+ site, N+1.50+ is bonded in a 1-coordinate geometry to one Pd+2.67+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li(NO)6 by Materials Project

Li(N2O)2(NO2)2 crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of eight nitrous acid molecules and four Li(N2O)2 clusters. In each Li(N2O)2 cluster, Li1+ is bonded in a linear geometry to two equivalent O2- atoms. Both Li–O bond lengths are 2.03 Å. There are two inequivalent N+1.83+ sites. In the first N+1.83+ site, N+1.83+ is bonded in a distorted bent 150 degrees geometry to one N+1.83+ and one O2- atom. The N–N bond length is 1.17 Å. The N–O bond length is 1.26 Å. In the second N+1.83+ site, N+1.83+ is bonded in a single-bond geometry to one N+1.83+ atom. O2- is bonded in an L-shaped geometry to one Li1+ and one N+1.83+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ZnC4(NO3)2 by Materials Project

ZnC3(NO2)2CO2 crystallizes in the orthorhombic Pnn2 space group. The structure is three-dimensional and consists of four carbon dioxide molecules and one ZnC3(NO2)2 framework. In the ZnC3(NO2)2 framework, Zn2+ is bonded in an octahedral geometry to two N3- and four O2- atoms. There is one shorter (1.94 Å) and one longer (1.95 Å) Zn–N bond length. There are a spread of Zn–O bond distances ranging from 2.18–2.42 Å. There are four inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a linear geometry to one N3- and one O2- atom. The C–N bond length is 1.19 Å. The C–O bond length is 1.22 Å. In the second C4+ site, C4+ is bonded in a linear geometry to one N3- and one O2- atom. The C–N bond length is 1.19 Å. The C–O bond length is 1.22 Å. In the third C4+ site, C4+ is bonded in a linear geometry to two equivalent O2- atoms. Both C–O bond lengths are 1.17 Å. In the fourth C4+ site, C4+ is bonded in a linear geometry to two equivalent O2- atoms. Both C–O bond lengths are 1.17 Å. There are two inequivalent N3- sites. In the first N3- site, N3- is bonded in a bent 150 degrees geometry to one Zn2+ and one C4+ atom. In the second N3- site, N3- is bonded in a distorted linear geometry to one Zn2+ and one C4+ atom. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Zn2+ and one C4+ atom. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Zn2+ and one C4+ atom. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Zn2+ and one C4+ atom. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to one Zn2+ and one C4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2Pd(NO2)4 by Materials Project

(Na(NO2)2)2Pd crystallizes in the orthorhombic Pna2_1 space group. The structure is three-dimensional and consists of four palladium molecules and one Na(NO2)2 framework. In the Na(NO2)2 framework, there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Na–O bond distances ranging from 2.42–2.79 Å. In the second Na1+ site, Na1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Na–O bond distances ranging from 2.44–3.01 Å. There are four inequivalent N3+ sites. In the first N3+ site, N3+ is bonded in a distorted bent 120 degrees geometry to two O2- atoms. Both N–O bond lengths are 1.25 Å. In the second N3+ site, N3+ is bonded in a distorted bent 120 degrees geometry to two O2- atoms. Both N–O bond lengths are 1.25 Å. In the third N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.26 Å) N–O bond length. In the fourth N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.26 Å) N–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Na1+ and one N3+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two Na1+ and one N3+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Na1+ and one N3+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to two Na1+ and one N3+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+ and one N3+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to two Na1+ and one N3+ atom. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to two Na1+ and one N3+ atom. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+ and one N3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na3Co(NO2)6 by Materials Project

Na3Co(NO2)6 crystallizes in the trigonal R-3 space group. The structure is three-dimensional and consists of three cobalt molecules and one Na(NO2)2 framework. In the Na(NO2)2 framework, there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to twelve O2- atoms to form a mixture of corner and face-sharing NaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 48°. There are six shorter (2.71 Å) and six longer (2.92 Å) Na–O bond lengths. In the second Na1+ site, Na1+ is bonded to six O2- atoms to form a mixture of corner and face-sharing NaO6 octahedra. There are three shorter (2.35 Å) and three longer (2.37 Å) Na–O bond lengths. N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.24 Å) and one longer (1.25 Å) N–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two Na1+ and one N3+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two Na1+ and one N3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na3Rh(NO2)6 by Materials Project

(Na(NO2)2)3Rh crystallizes in the trigonal R-3m space group. The structure is three-dimensional and consists of three rhodium molecules and one Na(NO2)2 framework. In the Na(NO2)2 framework, there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to six O2- atoms to form a mixture of corner and face-sharing NaO6 octahedra. There are three shorter (2.36 Å) and three longer (2.41 Å) Na–O bond lengths. In the second Na1+ site, Na1+ is bonded to twelve O2- atoms to form a mixture of corner and face-sharing NaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 45°. There are six shorter (2.66 Å) and six longer (2.95 Å) Na–O bond lengths. N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.24 Å) and one longer (1.25 Å) N–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two Na1+ and one N3+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two Na1+ and one N3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na3Ir(NO2)6 by Materials Project

Ir(Na(NO2)2)3 crystallizes in the trigonal R-3m space group. The structure is three-dimensional and consists of three iridium molecules and one Na(NO2)2 framework. In the Na(NO2)2 framework, there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to six O2- atoms to form a mixture of corner and face-sharing NaO6 octahedra. There are three shorter (2.36 Å) and three longer (2.40 Å) Na–O bond lengths. In the second Na1+ site, Na1+ is bonded to twelve O2- atoms to form a mixture of corner and face-sharing NaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 45°. There are six shorter (2.66 Å) and six longer (2.95 Å) Na–O bond lengths. N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. Both N–O bond lengths are 1.25 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two Na1+ and one N3+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two Na1+ and one N3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2Pd(NO2)4 by Materials Project

(K(NO2)2)2Pd crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional and consists of four palladium molecules and one K(NO2)2 framework. In the K(NO2)2 framework, there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.82–3.12 Å. In the second K1+ site, K1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.73–3.34 Å. There are four inequivalent N3+ sites. In the first N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. Both N–O bond lengths are 1.25 Å. In the second N3+ site, N3+ is bonded in a distorted bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.26 Å) N–O bond length. In the third N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.26 Å) N–O bond length. In the fourth N3+ site, N3+ is bonded in a distorted bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.26 Å) N–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to three K1+ and one N3+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent K1+ and one N3+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to two K1+ and one N3+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent K1+ and one N3+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent K1+ and one N3+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to one K1+ and one N3+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one N3+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one N3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KN3O4 by Materials Project

(K(NO2)2)2N2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional and consists of four ammonia molecules and one K(NO2)2 framework. In the K(NO2)2 framework, K1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.86–3.31 Å. There are two inequivalent N+2.33+ sites. In the first N+2.33+ site, N+2.33+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.26 Å) N–O bond length. In the second N+2.33+ site, N+2.33+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.24 Å) and one longer (1.25 Å) N–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent K1+ and one N+2.33+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent K1+ and one N+2.33+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to three equivalent K1+ and one N+2.33+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent K1+ and one N+2.33+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2Pt(NO2)4 by Materials Project

K2Pt(NO2)4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional and consists of four platinum molecules and one K(NO2)2 framework. In the K(NO2)2 framework, there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.81–3.28 Å. In the second K1+ site, K1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.74–3.28 Å. There are four inequivalent N3+ sites. In the first N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. Both N–O bond lengths are 1.25 Å. In the second N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.26 Å) N–O bond length. In the third N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. Both N–O bond lengths are 1.25 Å. In the fourth N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. Both N–O bond lengths are 1.25 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to three K1+ and one N3+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent K1+ and one N3+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to two K1+ and one N3+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent K1+ and one N3+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one N3+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent K1+ and one N3+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one N3+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent K1+ and one N3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2Pt(NO2)4 by Materials Project

K2Pt(NO2)4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional and consists of four platinum black molecules and one K(NO2)2 framework. In the K(NO2)2 framework, there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded to eight O2- atoms to form distorted corner-sharing KO8 hexagonal bipyramids. There are a spread of K–O bond distances ranging from 2.77–3.30 Å. In the second K1+ site, K1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of K–O bond distances ranging from 2.71–3.03 Å. There are four inequivalent N3+ sites. In the first N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.26 Å) N–O bond length. In the second N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. Both N–O bond lengths are 1.25 Å. In the third N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. Both N–O bond lengths are 1.25 Å. In the fourth N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.26 Å) N–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one N3+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+ and one N3+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one N3+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+ and one N3+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+ and one N3+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one N3+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent K1+ and one N3+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one N3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2Pt(NO2)4 by Materials Project

K2Pt(NO2)4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional and consists of four platinum molecules and one K(NO2)2 framework. In the K(NO2)2 framework, there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of K–O bond distances ranging from 2.65–3.35 Å. In the second K1+ site, K1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of K–O bond distances ranging from 2.75–3.27 Å. There are four inequivalent N3+ sites. In the first N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. Both N–O bond lengths are 1.25 Å. In the second N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.26 Å) N–O bond length. In the third N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.26 Å) N–O bond length. In the fourth N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.26 Å) N–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to two K1+ and one N3+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+ and one N3+ atom. In the third O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two equivalent K1+ and one N3+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+ and one N3+ atom. In the fifth O2- site, O2- is bonded in a distorted water-like geometry to one K1+ and one N3+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one N3+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one N3+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to one K1+ and one N3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li3Co(NO2)6 by Materials Project

(Li(NO2)2)3Co crystallizes in the trigonal R-3m space group. The structure is three-dimensional and consists of three cobalt molecules and one Li(NO2)2 framework. In the Li(NO2)2 framework, there are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded in an octahedral geometry to six O2- atoms. There are three shorter (2.01 Å) and three longer (2.30 Å) Li–O bond lengths. In the second Li1+ site, Li1+ is bonded in a 12-coordinate geometry to six equivalent O2- atoms. All Li–O bond lengths are 2.43 Å. N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.24 Å) and one longer (1.25 Å) N–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to one Li1+ and one N3+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two Li1+ and one N3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K4PdPt(NO2)8 by Materials Project

(K(NO2)2)4PtPd crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional and consists of two palladium molecules, two platinum molecules, and one K(NO2)2 framework. In the K(NO2)2 framework, there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.81–3.14 Å. In the second K1+ site, K1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.74–3.23 Å. There are four inequivalent N3+ sites. In the first N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. Both N–O bond lengths are 1.25 Å. In the second N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. Both N–O bond lengths are 1.25 Å. In the third N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.26 Å) N–O bond length. In the fourth N3+ site, N3+ is bonded in a bent 120 degrees geometry to two O2- atoms. Both N–O bond lengths are 1.25 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent K1+ and one N3+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to two K1+ and one N3+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent K1+ and one N3+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one N3+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one N3+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to three K1+ and one N3+ atom. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent K1+ and one N3+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent K1+ and one N3+ atom.

36 MATERIALS SCIENCE↗
NASA NTRS1997

Kinetics and Thermochemistry of the Br((sup 2)P3/2) + NO2 Association Reaction

A laser flash photolysis-resonance fluorescence technique has been employed to study the kinetics of the Br((sup 2)P3/2) + NO2 association reaction as a function of temperature (259-432 K) pressure (12.5 - 700 Torr), and buffer gas identity (He, Ar, H2, N2, CO2, CF4, SF6). The reaction is found to be in the falloff regime between third and second order over the entire range of conditions investigated. At temperatures below 350 K, the association reaction is found to be irreversible on the time scale of the experiment (approximately 30 ms). At higher temperatures reversible addition is observed, allowing equilibrium constants for BrNO2 formation and dissociation to be determined. Second- and third-law analyses of the equilibrium data are in only fair agreement and lead to the following thermochemical parameters for the association reaction: Delta-H(298) = 19.6 +/- 1.7 kcal/mol, Delta-H(0) = -18.6 +/- 2.0 kcal/mol, Delta-S(298) = 29.3 +/- 4.2 cal/mol/K, Delta-H(sub f)(sub 298)(BrNO2) = 17.0 +/-1.8 kcal/mol(uncertainties are 2 sigma estimates of absolute accuracy). The value for Delta-H(0) determined in this study has been employed to calculate k(sub 0)(sup SC), the low-pressure third-order rate coefficient in the strong collision limit, by using the method of Troe; calculated values of k(sub 0)(sup SC) are inconsistent with experimental results unless Delta-H(0) is assigned a value near the lower limit derived from analysis of the high-temperature approach to equilibrium data, i.e. delta-H(0) approximately equals -16.6 kcal/mol. A potential source of systematic error in the calculation of both k(sub 0)(sup SC) and the absolute entropy of BrNO2 results from the complete lack of knowledge of the energies and degeneracies of the electronic states of BrNO3. The procedure developed by Troe and co-workers has been employed to extrapolate experimental falloff curves to the low- and high-pressure limits. Derived values for k(sub 0)(M,298K) in units of 10(exp -31) cm(exp 6)/sq molecule/s range from 2.75 for M = He to 6.54 for M = CO2; 2 sigma uncertainties are estimated to be +/- 20%. Values for k(sub 0)(N2,T) in units of 10(exp -31) cm(exp 6)/sq molecule/s are 5.73 at 259 K, 4.61 at 298 K, and 3.21 at 346 K; the observed temperature dependence for k(sub 0)(N2,T) is consistent with the theoretical temperature dependence for Beta(sub c)k(sub 0)(sup SC). Values for k(sub infinity)(T) in units of 10(exp -11) cu cm/molecule/s are 2.86 at 259 K, 3.22 at 298 K, and 3.73 at 346 K; 2 sigma uncertainties are estimated to be a factor of 2. Approximate falloff parameters in a convenient format for atmospheric modeling are also derived.

Kreutter, K. D.↗
DOE OSTI2020

Materials Data on CrN3O4 by Materials Project

(CrN3O4)4(Cr(NO2)2)2N2 crystallizes in the orthorhombic Pnma space group. The structure is zero-dimensional and consists of four ammonia molecules, four Cr(NO2)2 clusters, and eight CrN3O4 clusters. In each Cr(NO2)2 cluster, Cr3+ is bonded in a 6-coordinate geometry to two N+1.67+ and four O2- atoms. There is one shorter (1.56 Å) and one longer (1.85 Å) Cr–N bond length. All Cr–O bond lengths are 2.00 Å. There are two inequivalent N+1.67+ sites. In the first N+1.67+ site, N+1.67+ is bonded in a single-bond geometry to one Cr3+ atom. In the second N+1.67+ site, N+1.67+ is bonded in a single-bond geometry to one Cr3+ atom. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to one Cr3+ and one O2- atom. The O–O bond length is 1.32 Å. In the second O2- site, O2- is bonded in a 1-coordinate geometry to one Cr3+ and one O2- atom. In each CrN3O4 cluster, Cr3+ is bonded in a pentagonal bipyramidal geometry to three N+1.67+ and four O2- atoms. There are a spread of Cr–N bond distances ranging from 1.78–1.87 Å. There are a spread of Cr–O bond distances ranging from 2.06–2.12 Å. There are three inequivalent N+1.67+ sites. In the first N+1.67+ site, N+1.67+ is bonded in a single-bond geometry to one Cr3+ atom. In the second N+1.67+ site, N+1.67+ is bonded in a single-bond geometry to one Cr3+ atom. In the third N+1.67+ site, N+1.67+ is bonded in a single-bond geometry to one Cr3+ atom. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Cr3+ and one O2- atom. The O–O bond length is 1.30 Å. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Cr3+ and one O2- atom. The O–O bond length is 1.30 Å. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Cr3+ and one O2- atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Cr3+ and one O2- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CrN3O4 by Materials Project

(Cr(NO2)2)2(CrN3O4)2N2 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four ammonia molecules, four Cr(NO2)2 clusters, and four CrN3O4 clusters. In each Cr(NO2)2 cluster, Cr3+ is bonded in a 6-coordinate geometry to two N+1.67+ and four O2- atoms. There is one shorter (1.61 Å) and one longer (1.83 Å) Cr–N bond length. There are two shorter (2.03 Å) and two longer (2.04 Å) Cr–O bond lengths. There are two inequivalent N+1.67+ sites. In the first N+1.67+ site, N+1.67+ is bonded in a single-bond geometry to one Cr3+ atom. In the second N+1.67+ site, N+1.67+ is bonded in a single-bond geometry to one Cr3+ atom. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Cr3+ and one O2- atom. The O–O bond length is 1.31 Å. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Cr3+ and one O2- atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to one Cr3+ and one O2- atom. The O–O bond length is 1.31 Å. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to one Cr3+ and one O2- atom. In each CrN3O4 cluster, Cr3+ is bonded in a distorted pentagonal bipyramidal geometry to three N+1.67+ and four O2- atoms. There are a spread of Cr–N bond distances ranging from 1.76–1.87 Å. There are a spread of Cr–O bond distances ranging from 2.06–2.15 Å. There are three inequivalent N+1.67+ sites. In the first N+1.67+ site, N+1.67+ is bonded in a single-bond geometry to one Cr3+ atom. In the second N+1.67+ site, N+1.67+ is bonded in a single-bond geometry to one Cr3+ atom. In the third N+1.67+ site, N+1.67+ is bonded in a single-bond geometry to one Cr3+ atom. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Cr3+ and one O2- atom. The O–O bond length is 1.30 Å. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Cr3+ and one O2- atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Cr3+ and one O2- atom. The O–O bond length is 1.30 Å. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Cr3+ and one O2- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CoN6(ClO)2 by Materials Project

(CoCl2)2(N2)5(NO2)2 crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of twenty ammonia molecules; four cobaltchloride molecules; and four hydroxylamine, n-hydroxy- molecules.

36 MATERIALS SCIENCE↗