作者:Valerica Pandarus、Davit Zargarian
DOI:10.1021/om700400x
日期:2007.8.1
paramagnetic, 17-electron species (i-Pr2POCH2)2CH}NiIIIX2 (X = Cl, 2i; Br, 2j). Solid-state structures are reported for Ni−halide derivatives, the neutral complexes 2d, 1g, and 1h, the cationic adduct 1e, and the Ni(III) derivative 2i. The cationic acrylonitrile derivative 1f promotes the Michael addition of morpholine, cyclohexyl amine, or aniline to acrylonitrile, methacrylonitrile, or crotonitrile
本报告描述了合成,表征,以及基于所述diphosphinito一系列新的钳型镍配合物的反应性的(POCOP)配体1,3-(异镨2 PO)2 C ^ 6 ħ 4,1,和(我-Pr 2 POCH 2)2 CH 2,2。这些配体与(THF)1.5 NiCl 2,(THF)2 NiBr 2或(CH 3 CN)n NiX 2(X = Br,n = 2; I,n= 3)通过中心碳原子的金属化得到钳型配合物。这些(POCOP)NiX配合物的产率随所用配体和Ni前驱体的类型以及反应条件而变化。通常,芳族配体1更易于金属化,从而获得极佳的钳形配合物2,6-(i- Pr 2 PO)2 C 6 H 3 } NiX(X = Cl,1a,85%产率; X = Br,1b,95%收率; X = I,1c,85%收率),特别是当在1当量的4-二甲基氨基吡啶(DMAP)存在下将反应混合物加热至60℃达1小时时。配体2的