摘要:
The phosphorane iminato complexes have been obtained as white crystalline powders at reacting Me3SiNPCl3 with BCl3, and BBr3, respectively. Crystallization from CH2Cl2 yields colourless crystals which have been characterized by single crystal X-ray diffraction analyses. [Cl2BNPCl2NPCl3](2) (1) crystallizes in space group P 2(1)/n with a = 961.5(1), b = 830.8(1), c = 1517.0(2) pm, beta = 107.32(1)degrees, Z = 2, R-1 = 0.0479. The molecule is centrosymmetric, and shows a square planar B2N2 four-membered ring with B-N distances of 154.3 pm. [Br2BNPCl3](2) (2) crystallizes in space group Cmca with a = 1334,93(8), b = 1189.55(7), c = 1026.42(6) pin, Z = 4, R-1 = 0.0436. The compound forms dimeric molecules with point symmetry C-2h, The characteristic Feature is a planar square B2N2 four-membered ring with B-N distances of 155.4 pm. The compounds have been characterized by NMR-, IR-, and MS-spectroscopy.