REACTIONS OF TRIMETHYL GROUP IVA HALIDES (Si, Ge, Sn) WITH PHOSPHINE-BRIDGED PALLADIUM, PLATINUM, AND SILVER DIMERS
Titel:
REACTIONS OF TRIMETHYL GROUP IVA HALIDES (Si, Ge, Sn) WITH PHOSPHINE-BRIDGED PALLADIUM, PLATINUM, AND SILVER DIMERS
Auteur:
Kirss, Rein U.
Verschenen in:
Journal of coordination chemistry
Paginering:
Jaargang 35 (1995) nr. 3-4 pagina's 281-288
Jaar:
1995-07-01
Inhoud:
Reactions of a series of binuclear, phosphine bridged late transition metal complexes, Pd2Cl2(dppm)2, Pd2Cl2(dmpm)2, Pd2Cl2(Ph2Ppy)2, Pt2Cl2(dppm)2, and Ag2Br2(dppm)2, with Me3SiX (X = Br, I), Me3GeBr and Me3SnBr were examined by 31P NMR spectroscopy. Rapid exchange of Pd-Cl, Pt-Cl and Ag-Br bonds for Pd-X, Pt-X (X = Br, I) and Ag-I bonds was observed to be independent of the nature of the phosphine ligand, the nature of the metal center or the group IV element. Differences in Lewis acidity of the transition metal center as a function of the ligands and the identity of the transition metal and differences in the basicity of the Me3EBr ligands are proposed to account for the failure to detect intermediates in these reactions similar to those reported for reactions between Pd2Cl2(dppm)2 and Me3SiX.
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