将ArCN或PhCN添加到LiSiR 3(thf)n (n = 0或3)或LiGeR 3(thf)3中,得到3-sila-或3-germa-
β-二酮锂[Li (N(R)C (Ar))2 SiR} D] 1或[Li (N(R)C(Ph))2 GeR}] 2 2分别为[Ar = 2,6-Me 2 C 6 H 3;R = SiMe 3 ; D =(thf)2 (1a),NCAr(1b)或(NCAr)2 (1c)]。化合物1a和等量的
重碱金属叔丁氧化物提供了适当的双核
金属络合物[M (N(R)C(Ar))2 SiR}] D] 2 [M = Na,D不存在(3),或M = Rb,D = NCAr(5)]或[K µ-(N(R)C(Ar))2 SiR}] 2 4;而具有Hg 2 Cl 2的1a给出Hg [SiR C(Ar)= NR} 2 ] 2 6。就这样
配体为(i) N,N'在单核配合物
锂-chelating