Synthesis, Structure, and Thermoelastic Properties of LiSn 2 Br 3 (CN 2 ) and Sn 4 Br 2 (CN 2 ) 3

Tin carbodiimides have been reported with various compositions, prepared via solid-state metathesis reactions by heating tin halides and lithium carbodiimide at moderate temperatures. The formations of two new compounds, LiSn2Br3(CN2) Sn4Br2(CN2)3 are monitored differential thermal analysis (DTA), crystal structures as refined on basis X-ray diffraction studies. structure can be described interpenetrating frameworks corner-linked coordination polyhedra, raising the possibility negative expansion (NTE) investigated density functional perturbation theory (DFPT). Like some previously was also found to a semiconductor an indirect band gap 2.5 eV, determined DFT calculations.