Abstract
The formation of platinum–diphosphine complexes of catalytic importance was investigated in [BMIM][PF 6] (BMIM=butyl-methyl-imidazolium cation) ionic liquid by NMR for the first time. Both the PtCl(SnCl 3)(bdpp) and Pt(SnCl 3) 2(bdpp) complexes (where bdpp=2,4-bis(diphenylphosphino)pentane) were identified in the insertion reaction of tin(II)chloride into the PtCl bond of PtCl 2(bdpp) complex. The addition of PPh 3 to PtCl 2(bdpp) resulted in the formation of [Pt(bdpp)(PPh 3)Cl] + complex cation as a minor component, which turned to be a major component in the presence of tin(II)chloride while it forms trichlorostannate counterion. Both types of reactions show high similarity with those obtained in conventional organic solvents. As a serious disadvantage of the use of [BMIM][PF 6] as ionic liquid, the partial decomposition of the hexafluorophosphate counterion in the presence of the smallest amount of water (and tin(II)chloride) is also discussed.
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