作者:Karlheinz Sünkel、Uwe Birk
DOI:10.1016/s0277-5387(99)00240-5
日期:1999.10
Dichloroethyne reacts with [Ni(PR3)2(C2H4)] (R=Ph, Me, Et, Pr, Bu) or [Ni(dcpe)(C2H4)] (dcpe=bis-dicyclohexylphosphinoethane) to form the π-complexes Ni(PR3)2(η-ClCCCl), the σ-alkynyl complexes [Ni(Cl)(CCCl)(PR3)2], the phosphonioacetylide complexes [NiCl(CC–PR3)(PR3)2]Cl, or the cyclotrimerization products [NiCl2(C6Cl4PR3)(PR3)] depending on both the nature of the phosphine and the reaction conditions
二氯乙炔与[Ni(PR 3)2(C 2 H 4)](R = Ph,Me,Et,Pr,Bu)或[Ni(dcpe)(C 2 H 4)](dcpe =双-二环己基膦酸酯乙烷)反应形成π-络合物Ni(PR 3)2(η-ClCCCl),σ-炔基络合物[Ni(Cl)(CCCl)(PR 3)2 ],膦酰乙炔化物络合物[NiCl(C) C–PR 3)(PR 3)2 ] Cl或环三聚产物[NiCl 2(C 6 Cl 4 PR 3)(PR 3)]取决于膦的性质和反应条件。在膦酰基乙炔化物络合物中,一个氯离子很容易被其他阴离子取代,而添加两当量的AgSbF 6导致形成双-(膦酰基乙炔化物)络合物[Ni(CC–PR 3)]的第一个实例。2(PR 3)2 ] 2+ [的SbF 6 - ] 2。的[镍(CL)(CCCl)(PPH结构3)2 ]和[镍(CCPBu 3)2(PBU 3)2 ] [的SbF 6 ]