82312-00-3Relevant academic research and scientific papers
A β-Elimination reaction involving a binuclear ethylplatinum(II) complex
Azam, Kazi A.,Brown, Michael P.,Cooper, Susan J.,Puddephatt, Richard J.
, p. 1183 - 1188 (2008/10/08)
The new ethylplatinum complexes [PtEt2dppm)], [PtClEt(dppm)], [Pt2Et2(μ-H)(μ-dppm)2][SbF6] (IIb), and [Pt2Et3(μ-dppm)2] [SbF6] (Ib) have been prepared and characterized (dppm = Ph2PCH2PPh2). Of particular interest is the facile reaction of Ib to give IIb and ethylene in solution, which is formally a binuclear elimination process. Reaction of [Pt(CH2CD3)2(dppm)] with H[SbF6] gave the analogue of Ib in which scrambling of H and D within the ethyl groups had occurred, while thermolysis of a mixture of Ib and [Pt2(CD2CD3)3(M-dppm)2] [SbF6] (Ic) gave C2H4 and C2D4 as volatile products. Thermolysis of Ib in 1,2-dichloroethane, acetone, or acetonitrile followed first-order kinetics, and the reaction was not retarded by added dppm. From consideration of the Arrhenius parameters for thermolysis of Ib and from the low isotope effect on the rate of thermolysis of Ic, it is argued that neither the β elimination nor the ethylene dissociation step is rate-determining in the thermolysis of Ib.
