Materials Data on Mn(H2N)2 by Materials Project
Mn(NH)2H2 crystallizes in the tetragonal I4_1/acd space group. The structure is three-dimensional and consists of thirty-two hydrogen molecules and two Mn(NH)2 frameworks. In each Mn(NH)2 framework, Mn2+ is bonded in a distorted rectangular see-saw-like geometry to two N3- and two equivalent H1+ atoms. There are one shorter (2.03 Å) and one longer (2.09 Å) Mn–N bond lengths. There is one shorter (1.72 Å) and one longer (1.73 Å) Mn–H bond length. There are three inequivalent N3- sites. In the first N3- site, N3- is bonded in a linear geometry to two equivalent N3- atoms. Both N–N bond lengths are 1.18 Å. In the second N3- site, N3- is bonded in a distorted water-like geometry to two equivalent Mn2+ and two equivalent H1+ atoms. Both N–H bond lengths are 1.03 Å. In the third N3- site, N3- is bonded in a bent 150 degrees geometry to one Mn2+ and one N3- atom. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a water-like geometry to two equivalent Mn2+ atoms. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom.