Materials Data on LiH13(CN2)2 by Materials Project
Li(NH3)4C2H is Silicon tetrafluoride-derived structured and crystallizes in the tetragonal P4/n space group. The structure is zero-dimensional and consists of two ethyne molecules and two Li(NH3)4 clusters. In each Li(NH3)4 cluster, Li1+ is bonded in a tetrahedral geometry to four equivalent N3- atoms. All Li–N bond lengths are 2.07 Å. N3- is bonded to one Li1+ and three H1+ atoms to form distorted corner-sharing NLiH3 tetrahedra. There is one shorter (1.02 Å) and two longer (1.03 Å) N–H bond length. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom.