Synthesis, structures and reactions of lithium complexes of [(o-RCHC<sub>6</sub>H<sub>4</sub>)PPh<sub>2</sub>NSiMe<sub>3</sub>]<sup>−</sup>(R = H, SiMe<sub>3</sub>) ligands
作者:Zhong-Xia Wang、Chun-Yan Qi
DOI:10.1039/b418389d
日期:——
formed a lithium enamide complex [LiN(SiMe3)C(Ph)CHC6H4(PPh2=NSiMe3)-2}.tmen] (9). Reaction of two equivalents of 5 with 1,4-dicyanobenzene gave a dilithium complex [Li(OEt2)2}2(1,4-C(N(SiMe3)CHC6H4(PPh2=NSiMe3)-2}2C6H4)] (10). All compounds were characterised by NMR spectroscopy and elemental analyses. The structures of compounds 2, 3, 5, 6 and 9 have been determined by single crystal X-ray diffraction
通过Ph2P(Br)= NSiMe3与邻甲基苯基锂反应制得N-三甲基甲硅烷基邻甲基苯基二苯基膦亚胺(o-MeC6H4)PPh2 = NSiMe3(1)。用LiBun处理1,然后用Me3SiCl处理,得到(o-Me3SiCH2C6H4)PPh2 = NSiMe3(2)。在tmen存在下用LiBu(n)进行1和2的锂化反应得到结晶锂络合物[Li CH(R)C6H4(PPh(2 = NSiMe3)-。tmen](3,R = H; 4,R =从4的母液中,得到痕量的经tmen桥连的络合物[Li CH(SiMe3)C6H4(PPh2 = NSiMe3)-2}] 2(mu-tmen)(5),使2与在Et2O中的LiBun生成络合物[Li CH(SiMe3)C6H4(PPh2 = NSiMe3)-2} .OEt2](6)。锂与Me2SiCl2以2:1摩尔比反应,得到二甲基甲硅烷基桥接的化合物Me2Si