107352-04-5Relevant academic research and scientific papers
SYNTHESES AND CRYSTAL STRUCTURES OF THE DIMERS OF A BIS(LITHIOAMINO)- AND A TRIS(LITHIOAMINO)-SILANE CONTAINING ELECTRON-DEFICIENT Li4N4 AND Li6N6 CLUSTERS
Brauer, D. J.,Buerger, H.,Liewald, G. R.
, p. 119 - 130 (1986)
The syntheses of 3SiPh and 3SiPh>2 (IV) are described, and their 1H NMR, infrared and Raman spectra are reported.Crystals of 2SiMe2>2 (III) belong to the space group C2/c with a 18.799(5), b 8.963(3), c 18.672(5) Angstroem, β 112.19(2)deg, Z=4 and R=0.084.There is a Li4 bis-phenoid at the core of the dimers, the two pairs of Li3 faces being linked by the two N-Si-N bridges.The molecular symmetry is roughly 42m (D2d) although only two-fold crystallographic symmetry is required.The dimers IV are centered on 1 symmetry sites of the space group P1 with a 10.234(2), b 10.406(2), c 11.476(3) Angstroem, α 61.43(1), β 82.16(1), γ 73.28(1)deg, Z=1 and R=0.057.Each nitrogen atom is boded to a Li3 face of a Li6 trigonal antiprism with the Si atoms over the remaining two unbridged faces.The overall symmetry approaches 3m (D3d).Factors determining the shapes of the Li4N4 and Li6N6 clusters of III and IV, respectively, are discussed.
