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The transparent colourless crystal of the title compound crystallized in monoclinic system with space group P21/c and cell dimensions a=9.857(7), b=11.128(4), c=16.036(7) A, β=103.31(5)°, V=1711.7A3, Z=4, Dc= 1.25 g.cm-3, λ =-1.5418 A, μ= 13.067 cm-1. The structure was solved by direct methods and refined by full matrix least-squares, the final discrepancy factor R=0.061 and Rw=0.060. The skeleton of the molecule is composed of three five-membered rings with a common edge N(l)-Si(l), and the dihedral angles between each two of the three rings are 110.5°, 107.9° and 105.0° respectively. The N(l)-Si(l) coordination bond length is 2.143(3) A. In comparison with the structures of other related compounds, it was found the N-Si bond length varies with the electronegativities of the substitute groups R at Si atom.
The transparent colorless crystal of the title compound crystallized in monoclinic system with space group P21 / c and cell dimensions a = 9.857 (7), b = 11.128 (4), c = 16.036 (7) A, , V = 1711.7A3, Z = 4, Dc = 1.25 g.cm-3, λ = -1.5418 A, μ = 13.067 cm-1. The structure was solved by direct methods and refined by full matrix least-squares, the final discrepancy factor R = 0.061 and Rw = 0.060 The skeleton of the molecule is composed of three five-membered rings with a common edge N (1) -Si (1), and the dihedral angles between each two of the three rings are 110.5 The N (l) -Si (l) coordination bond length is 2.143 (3) A. In contrast with the structures of other related compounds, it was found the N-Si bond length varies with the electronegativities of the substitute groups R at Si atom.