256339-08-9Relevant academic research and scientific papers
Coordination chemistry of perhalogenated cyclopentadienes and alkynes, XXIII: The reaction of dichloroethyne with Ni(0) phosphine complexes: The strong influences of phosphine, solvent and concentration on the product composition. Structures of Ni(PPh3)2(Cl)(CCCl) and [Ni(PBu3)2(CC-PBu3)2] 2+[SbF6-]2
Suenkel, Karlheinz,Birk, Uwe
, p. 3187 - 3197 (2008/10/09)
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. In the phosphonioacetylide complexes, one chloride can easily be substituted by other anions, while the addition of two equivalents of AgSbF6 results in the formation of the first examples of the bis-(phosphonioacetylide) complexes [Ni(CC-PR3)2(PR3)2] 2+[SbF6-]2. The structures of [Ni(Cl)(CCCl)(PPh3)2] and [Ni(CCPBu3)2(PBu3)2][SbF 6]2 have been determined by X-ray diffraction. Elsevier Science Ltd.
