Reversal of polarization in amidophosphines: neutral- and anionic-κP coordination vs. anionic-κP,N coordination and the formation of nickelaazaphosphiranes
作者:Ingo Schranz、Graham R. Lief、Christopher J. Carrow、Dana C. Haagenson、Luke Grocholl、Lothar Stahl、Richard J. Staples、Ramamoorthy Boomishankar、Alexander Steiner
DOI:10.1039/b507040f
日期:——
create nickel complexes chelated in a κ2P fashion by the o-phenylenediamine-tethered mono- and di-anionic 1-Me2Si(μ-NBut)2PN} 2-Me2Si(μ-NBut)2PNH}C6H4 and 1,2-Me2Si(μ-NBut)2PN}C6H4, respectively, afforded instead [1,2-Me2Si(μ-NBut)2PN}Me2Si(μ-NBut)2PN}C6H4NiCl] and [1,2-Me2Si(μ-NBut)2PN}Me2Si(μ-NBut)2PN}C6H4NiPEt3}], each complex having κP,N and κP coordinated amidophosphine ligands.
镍(II),氯化与发生反应的双(叔-丁基氨基)diazadiphosphetidine 卜吨(H)NP(μ-NBU吨)2 P N(H)卜吨}以形成反式- [卜吨(H)NP(μ-NBU吨)2 P N(H)Bu t } 2 NiCl 2 ]。在溶液和固态中每个杂环配体仅通过一个磷原子配位镍。为了比较,还确定了已知的反式-[NiCl 2(PEt 3)2 ]的固态结构,并且发现这两种络合物具有关于镍的几乎相同的键参数。镍- amidophosphine络合物[卜吨OP(μ-NBU吨)2 PN卜吨}的NiCl(PBU Ñ 3)],[(PBU Ñ 3)ClNi 卜吨NP(μ-NBU吨)2 PN卜吨} NiCl(PBu n 3)]和[Me2硅(μ-NBU吨) 2 PN卜吨}的NiCl(PBU Ñ 3)〕的合成和透视结构表征。在这些单核和双核镍配合物中,镍离子 由一个三烷基膦以伪正方形平面的方式进行配位