185555-06-0Relevant academic research and scientific papers
Electrophilic methylplatinum complexes: First structure of a hydroxytris(pentafluorophenyl)borate complex
Hill, Geoffrey S.,Manojlovic-Muir, Ljubica,Muir, Kenneth W.,Puddephatt, Richard J.
, p. 525 - 530 (1997)
Treatment of [PtMe2(bu2bpy)] (bu2bpy = 4,4′-di-tert-butyl-2,2′-bipyridine) with B(C6F5)3 in the presence of the ligand L gives, under anhydrous conditions, [PtMeL(bu2bpy)][MeB-(C6F5)3] {L = CO (1a), C2H4 (2a), PPh3 (3a)}. Similar reactions performed in the presence of H2O afford [PtMeL(bu2bpy)][HOB(C6F5)3] {L = CO (1b), C2H4 (2b), PPh3 (3b)}. In the absence of L, the treatment of [PtMe2(bu2bpy)] with B(C6F5)3 and H2O gives [Pt{HOB(C6F5)3}Me(bu2bpy)] (4), the first published example of a hydroxytris(pentafluorophenyDborate complex. All of the complexes are fully characterized by NMR and IR spectroscopy and, in the case of complex 4, by an X-ray analysis which confirms the attachment of the [HOB(C6F5)3]- ligand to the square-planar platinum atom via a Pt-O bond of 2.062(2) ?. We propose that, in the presence of water, B(C6F5)3 forms an adduct [H2OB(C6F5)3] (which acts as a strong acid H[HOB(C6F5)3]) and this then protonates a Pt-Me bond of [PtMe2(bu2bpy)] forming CH4 and [PtMe(bu2bpy)]+[HOB(C6F5) 3]-. This protonolysis methodology provides an alternative route to the well-established electrophilic methyl-ligand abstraction by B(C6F5)3 for the production of late transition-metal cations.
