Synthesis and structural characterisation of nickel(II) alkyl complexes NiR2, [Ni(Cp)R]2 and a ‘head-to-tail’ coupled alkyl intermediate compound [NiR(Cl)(R–R)] [R=C(SiMe3)2C5H4N-2, CPh(SiMe3)C5H4N-2 or CH(SiMe3)C5H4N-2; Cp=η5-C5H5]
作者:Wing-Por Leung、Hung-Kay Lee、Zhong-Yuan Zhou、Thomas C.W. Mak
DOI:10.1016/s0022-328x(98)00629-9
日期:1998.8
Thermally stable nickel(II) alkyls NiR2 [R=R1=C(SiMe3)2C5H4N-2 (1); R=R2=CPh(SiMe3)C5H4N-2 (2),] and [CpNiR]2 [Cp=η5-C5H5; R=R3=CH(SiMe3)C5H4N-2 (4)] containing pyridine-functionalised α-substituted alkyl ligands have been prepared by the alkylation of nickel(II) dihalide complexes [NiX2L2] (X=Cl, Br; L2=2 PPh3, N,N,N′,N′-tetramethylethylenediamine) or nickelocene with appropriate lithium alkyls. However,
热稳定的烷基镍(II)NiR 2 [R = R 1= C(SiMe 3)2 C 5 H 4 N-2(1);n =1。R = R 2 =器CPh(森达3)C 5 H ^ 4 N-2(2),]和[CpNiR] 2混合[Cp = η 5 -C 5 H ^ 5 ; R = R 3= CH(SiMe 3)C 5 H 4 N-2(4)],含有吡啶官能化的α已通过二卤化镍(II)配合物[NiX 2 L 2 ](X = Cl,Br; L 2 = 2 PPh 3,N,N,N',N'-四甲基乙二胺)的烷基化制备了取代的烷基配体带有适当的烷基锂的新星。但是,[LiR 1 ] 2与[NiCl 2(diphos)](diphos = Ph 2 PCH 2 CH 2 PPh 2)的类似烷基化反应得到了新型的氯化镍(II)烷基氯化物络合物[NiR 1(Cl)(R 1 – R 1)](3),其中保留了“从头到尾”偶联的有机化合物2-CH(SiMe