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Z. Naturforsch. 2012,
67b, 557 – 563
doi:10.5560/ZNB.2012-0087
Coordination Chemistry of Perhalogenated Cyclopentadienes and Alkynes, XXIX. The Reaction of Ni(0) and Pt(0) Phosphane Complexes with Trichloroethene, Hexachloro- and Hexabromocyclopentadiene
Department of Chemistry, Ludwig-Maximilians University Munich, Butenandtstr. 9, D-81377 Munich, Germany
Reprint requests to Prof. Dr. Karlheinz Sünkel. Fax: ++49 89 2180 77774. E-mail:
suenk@cup.uni-muenchen.de
Received March 29, 2012 / published online July 6, 2012
Dedicated to Professor Wolfgang Beck on the occasion of his 80th birthday
Trichloroethene reacts with [Pt(PPh3)2(C2H4)] at first to the π complex [Pt(PPh3)2(η2-C2HCl3)] (1a), which isomerizes via the cis-isomer to the insoluble trans-[Pt(Cl)(η1-CH=CCl2)(PPh3)2] (2a). Both 1a and 2a react with PBu3 to the corresponding tributylphosphane complexes 1b and 2b, respectively. From the reactions of [Ni(PR3)2(C2H4)] (R = Me, Et, Bu) and C2HCl3 only the products of
oxidative addition trans-[Ni(Cl)(η1-CH=CCl2)(PR3)2] (3a–c) can be isolated. Hexachlorocyclopentadiene and hexabromocyclopentadiene react with [Pt(PPh3)2(C2H4)] or [Ni(PR3)2(C2H4)] (R = Ph, Me) to give highly colored solutions.
Key words: Oxidative Addition, Platinum Phosphane Complexes, Nickel Phosphane Complexes, Trichloroethene, Hexachlorocyclopentadiene