Oxidative addition reactions of bis-aryl cyclometallated platinum(II) compounds with mercury(II) carboxylates. X-Ray crystal and molecular structure of the binuclear platinum–mercury compound rac-a-(µ-acetato-O,O′)-b-(O-acetatomercurio)-cf,de-bis[2-(dimethylaminomethyl)-phenyl-N,C]platinum

Abstract

Oxidative addition reactions of Hg^II(O₂CR)₂ with cis-[(o-Me₂NCH₂C₆H₄)₂Pt^II] as well as of [{oo′-(Me₂NCH₂)₂C₆H₃}Pt^IIBr] resulted in the formation of a novel type of stable aryl Pt–Hg compounds of which [(o-Me₂NCH₂C₆H₄)₂Pt(µ-MeCO₂)Hg(O₂CMe)] was the subject of an X-ray diffraction study [Pt–Hg 2·513(1)Å]; in contrast reaction of trans-[(o-Me₂NCH₂C₆H₄)₂Pt^II] with Hg^II(O₂CMe)₂ proceeded via unstable Pt–Hg intermediates with the elimination of Hg⁰ and formation of the isomers of [(o-Me₂NCH₂C₆H₄)₂Pt^IV(O₂CMe)₂](cis C, trans N and trans C, cis N).