165398-31-2Relevant academic research and scientific papers
Synthesis of novel platinum-silver and platinum-copper complexes with bridging alkynyl ligands
Fornies, J.,Lalinde, E.,Martin, A.,Moreno, M.T.
, p. 179 - 188 (1995)
The study of the reactivity of CR)8> M = Ag or Cu; R = Ph or tBu) towards different neutral and anionic ligands is reported.This study reveals that reactions of the phenylacetylide derivatives CPh)8> with anionic, X- (X = Cl or Br) or neutral donors (CNtBu or py) in a molar ratio 1:4 (M/donor ratio 1:1) yield the trinuclear anionic (NBu4)2CPh)4>(MX)2> (M = Ag or Cu, X = Cl or Br) or neutral CPh)4>(AgL)2> (L = CNtBu or py) complexes, respectively.The crystal structure of (NBu4)2CPh)4>(CuBr)2>(4) shows that the anion is formed by a dianionic Pt(CCPh)4 fragment and two neutral CuBr units joined through bridging alkynyl ligands.All the alkynyl groups are ? bonded to Pt and η2-coordinated to a Cu atom which have an approximately trigonal-planar geometry.By contrast, similar reactions with CtBu)8> (molar ratio M/donor 1:1) afford hexanuclear dianionic (NBu4)2CtBu)8X2> or neutral CtBu)8Py2>.Only by treatment with a large excess of Br- (molar ratio M/Br- 1:2) are the trinuclear complexes (NBu4)2CtBu)4>(MBr)2> (M = Ag, Cu) obtained.Attempted preparations of analogous complexes with phosphines (L' = PPh3 or PEt3) by reactions of CR)8> with L' leads to displacement of alkynyl ligands from platinum and formation of neutral mononuclear complexes CR)2L'2>. Keywords: Platinum; Silver; Alkynyl; Copper; Polynuclear; X-ray diffraction
