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PdCl2(SeCl2)2 crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four palladium(ii) chloride molecules and eight selenium dichloride molecules.
Pd(Se3Cl)2 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of one Pd(Se3Cl)2 sheet oriented in the (-1, 0, 2) direction. Pd2+ is bonded in a square co-planar geometry to two equivalent Se and two equivalent Cl1- atoms. Both Pd–Se bond lengths are 2.44 Å. Both Pd–Cl bond lengths are 2.33 Å. There are three inequivalent Se sites. In the first Se site, Se is bonded in a square co-planar geometry to two Se and two equivalent Cl1- atoms. There are one shorter (2.35 Å) and one longer (2.43 Å) Se–Se bond lengths. There are one shorter (3.07 Å) and one longer (3.48 Å) Se–Cl bond lengths. In the second Se site, Se is bonded in a water-like geometry to two Se atoms. The Se–Se bond length is 2.42 Å. In the third Se site, Se is bonded in a 1-coordinate geometry to one Pd2+ and two Se atoms. Cl1- is bonded in a distorted single-bond geometry to one Pd2+ and two equivalent Se atoms.
Pd(Se4Cl)2 crystallizes in the orthorhombic Pbca space group. The structure is three-dimensional. Pd4+ is bonded in a square co-planar geometry to two equivalent Se+0.25- and two equivalent Cl1- atoms. Both Pd–Se bond lengths are 2.45 Å. Both Pd–Cl bond lengths are 2.33 Å. There are four inequivalent Se+0.25- sites. In the first Se+0.25- site, Se+0.25- is bonded in a 1-coordinate geometry to one Pd4+, two Se+0.25-, and one Cl1- atom. There are one shorter (2.40 Å) and one longer (2.46 Å) Se–Se bond lengths. The Se–Cl bond length is 3.26 Å. In the second Se+0.25- site, Se+0.25- is bonded in a distorted rectangular see-saw-like geometry to two Se+0.25- and two equivalent Cl1- atoms. The Se–Se bond length is 2.38 Å. There are one shorter (3.18 Å) and one longer (3.39 Å) Se–Cl bond lengths. In the third Se+0.25- site, Se+0.25- is bonded in a distorted water-like geometry to two Se+0.25- atoms. The Se–Se bond length is 2.33 Å. In the fourth Se+0.25- site, Se+0.25- is bonded in a 4-coordinate geometry to two Se+0.25- and two equivalent Cl1- atoms. There are one shorter (3.45 Å) and one longer (3.96 Å) Se–Cl bond lengths. Cl1- is bonded in a distorted single-bond geometry to one Pd4+ and five Se+0.25- atoms.