Combining different anions in one material allows tuning
of its
structural, magnetic, and electronic properties. We hereby present
the mixed anion compound Sr2BN2H, expanding
the less-known class of nitridoborate hydrides. Solid-state reaction
of Sr2N, BN, and SrH2 at 850 °C in a tube
furnace yielded a gray, air- and moisture-sensitive powder of Sr2BN2H. It crystallizes as colorless platelets in
the orthorhombic space group Pnma (no. 62) with a = 9.9164(2), b = 3.9079(1), and c = 10.1723(2) Å and Z = 4. An initial
structural model was obtained from single-crystal X-ray diffraction
data and corroborated by neutron powder diffraction data of the corresponding
deuteride. Further validation by 1H and 11B
MAS NMR, FTIR, and Raman spectroscopy complements the structural proof
of anionic hydrogen present in the compound. Quantum chemical calculations
support the experimental findings and reveal the electronic structure
of Sr2BN2H.