Uncatalyzed cis to trans isomerization of cis-[PtCl2(PBu3)(PhCN)] complex in different solvents. Evidence for an initial dimer formation
作者:Ibrahim M. Al-Najjar、Hamad A. Al-Lohedan、Zuheir A. Issa
DOI:10.1016/s0020-1693(00)85854-5
日期:1988.3
cis-trans isomerization of the complex cis-[PtCl2(PBu3)(PhCN)] have been measured in differentsolvents. Values of kobs decrease with the polarity of the solvent (benzene ∼ toluene $ CHCl3 ∼ DMF). 31P and 195Pt NMR spectroscopy provide (for the first time) strong evidence for dimer formation (sym. trans-[Pt2(μ- Cl)2(Cl)2(PBu3)2]) which are intermediates in spontaneous cis/transisomerization.