dichromium methylidene and a dichromium methyl complex. Alkylation of [Ap′CrCl2(thf)2] (Ap′-H = (2,6-diisopropylphenyl)-[6-(2,6-dimethylphenyl)pyridin-2-yl]amine) afforded selectively the dimethyl complex [Ap′2CrCr(CH3)2]. In addition to reductive alkylation, oxidative addition can be used to synthesize chromium methyl complexes. Selective oxidative addition was observed when CH3I was reacted with the
1当量的去质子化的(空间需求的)
氨基吡啶Ap * -H(Ap * -H =(2,6-二异丙基苯基)-[6-(2,4,6-
三异丙基苯基)
吡啶-2-基]胺)与[CrCl 3(thf)3 ]选择性地生成单体配合物[Ap * CrCl 2(thf)2 ]。通过
甲基锂对[Ap * CrCl 2(thf)2 ]进行甲基化,得到重
铬亚甲基和重
铬甲基络合物的混合物。[Ap'CrCl 2(thf)2 ]的烷基化(Ap'-H =(2,6-二异丙基苯基)-[6-(2,6-二甲基苯基)
吡啶-2-基]胺)选择性地提供了二甲基配合物[ AP' 2 CRCR(CH 3)2]。除还原烷基化外,还可使用氧化加成合成
铬甲基络合物。当CH 3 I与五重键合的Cr I二聚体[Ap'CrCrAp']反应时,观察到选择性氧化加成。这里,格氏样的Cr 2化合物[AP' 2 CRCR(μ-I)(μ-CH 3形成)。进行DFT计算以研究有机
金属配合物的电子结构。