Synthesis and reactivities of novel η2-(C,O) alkylphenylketene complexes of nickel. Coordination-mode switching reaction of the ketene ligand
作者:Akira Miyashita、Ryu-ji Sugai、Jun-ichi Yamamoto
DOI:10.1016/0022-328x(92)83233-8
日期:1992.4
A series of bis(tertiary phosphine)(alkylphenylketene)nickel complexes, Ni[(C6H5(R)CCO)L2 [R CH3 (a), C2H5 (b); L P(C6H5)3 (1), P(C6H5)2(p-CH3C6H4) (2)], were isolated from the reaction of bis(1,5-cyclooctadiene)nickel with alkylphenylketene in the presence of the corresponding tertiary phosphines. The spectroscopic analyses of 1 and 2 suggest η2-(C,O) to be a ketene structure close to the structure
一系列的双(叔膦)(烷基苯基烯酮)镍配合物,Ni [(C 6 H 5(R)CCO)L 2 [RCH 3(a),C 2 H 5(b);LP(C 6 H 5)3(1),P(C 6 H 5)2(p -CH 3 C 6 H 4)(2)]是在相应的叔膦存在下,从双(1,5-环辛二烯)镍与烷基苯乙烯酮的反应中分离得到的。的分光分析1和2表明η 2 - (C,O)是一个烯酮结构接近oxanickelacyclopropane的结构。基于在它们的化学反应性和fluxional行为1 H和13 C NMR,的烯酮部分1和2切换它们的配位模式从η 2 - (C,O)和η 2通过一个关联(C,C)型-在进行进一步反应之前,涉及双核μ-乙烯酮中间体的方法。