62343-16-2Relevant academic research and scientific papers
Secondary kinetic isotope effects in oxidative addition of benzyl bromide to dimethylplatinum(II) complexes
Aseman, Marzieh Dadkhah,Rashidi, Mehdi,Nabavizadeh, S. Masoud,Puddephatt, Richard J.
, p. 2593 - 2598 (2013/06/26)
The secondary α-deuterium kinetic isotope effects (KIEs), (k H/kD)α, have been determined, at different temperatures and in solvents having different polarities, for reaction of PhCH2Br/PhCD2Br with t
Cationic intermediates in oxidative addition reactions of alkyl halides to d8 complexes: Evidence for the SN2 mechanism
Crespo, Margarita,Puddephatt, Richard J.
, p. 2548 - 2550 (2008/10/08)
The oxidative addition reactions of RX to [PtMe2L2] (1) to give [PtXMe2RL2] (3) (L2 = 2,2′-bipyridine, RX - MeI, PhCH2Br; L = PMe2Ph, RX = MeI) are shown to occur by way of an ionic intermediate [PtSMe2RL2]+X- (2), when the solvent (S) = CD3CN and, for RX = MeI and L2 = 2,2′-bipyridine, when S = CD3OD or acetone-d6. The intermediates 2 were detected and characterized by low-temperature 1H and, when L = PMe2Ph, 31P NMR studies. At temperatures above -20 °C the ligand substitution of X- for S occurred rapidly and hence the intermediates were detected only for the most reactive systems, which underwent oxidative addition at temperatures below -20°C. Less reactive systems, for example, EtI with [PtMe2(bpy)] or MeI with [IrCl(CO)(PPh3)2], failed to give detectable ionic intermediates. The observation of ionic intermediates provides strong evidence for the SN2 mechanism of oxidative addition.
