respectively. A five-coordinated complex [NiLBr]PF6 (3) was further obtained by grinding NH4PF6 with complex 1 or 1′, or grinding KBr with complex 2. Complex 3 can also be obtained by direct grinding of complexes 1/1′ and 2. Complex 3 was subsequently used as a catalyst in the C–S bond cross-coupling of 2-bromoacetophenone and 2-mercaptobenzothiazole. The entire procedure from the synthesis to the catalytic
本文介绍了通过逐步研磨合成三种 N-杂环卡宾配合物。
苯并咪唑盐([H 2 L]Br 2和[H 2 L](PF 6 ) 2 ([ H 2 L ] = 1,1'-di(2-picolyl)-3,3'-methylenedibenzoimidazolium))是初步准备。它们通过研磨与Ni(OAc) 2 ·4H 2 O反应得到三种
镍配合物,[NiL]Br 2 ·CH 3 OH ( 1 )、[NiL]Br 2 ·2H 2 O ( 1' )和[NiL]( PF 6 ) 2·分别为0.5CH 3 CN ( 2 )。NH 4 PF 6与络合物1或1'一起研磨,或者KBr与络合物2一起研磨,进一步得到五配位络合物[NiLBr]PF 6 ( 3 ) 。配合物3也可以通过配合物1 / 1'和2的直接研磨获得。综合体3随后在
2-溴苯乙酮和
2-巯基苯并噻唑的 C-S 键交叉偶联中用作催化剂。从合成到催化反应的