Materials Data on Na2Sn(H2N)6 by Materials Project
Na2Sn(NH2)6 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. Na1+ is bonded in a 9-coordinate geometry to nine equivalent N3- atoms. There are a spread of Na–N bond distances ranging from 2.47–2.87 Å. Sn4+ is bonded in a cuboctahedral geometry to six equivalent N3- and six equivalent H1+ atoms. All Sn–N bond lengths are 2.54 Å. All Sn–H bond lengths are 2.29 Å. N3- is bonded in a 1-coordinate geometry to three equivalent Na1+, one Sn4+, two equivalent N3-, and one H1+ atom. Both N–N bond lengths are 1.49 Å. The N–H bond length is 1.71 Å. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a 1-coordinate geometry to one N3- and two equivalent H1+ atoms. Both H–H bond lengths are 0.96 Å. In the second H1+ site, H1+ is bonded in a distorted single-bond geometry to one Sn4+ and one H1+ atom. The H–H bond length is 0.77 Å.