Abstract
Dioxomolybdenum(VI) thionates were readily isolated from the reactions of MoO 2Cl 2 with thallium salts of representative thiones [2-mercaptopyridine (Py-SH), 2-mercaptopyrimidine (Pym-SH), 2-mercapto-4-methylpyrimidine (MePym-SH), 2-mercaptobenzothiazol (BzTz-SH), 2-mercaptobenzoxazol (BzOx-SH) and 2-mercaptonicotinic acid methyl ester (MeNic-SH)]. They behave as Lewis acids and addition compounds with pyridines could be readily prepared. The molecular structure of dioxobis(pyridine-2-thiolate- N, S)molybdenum(VI), MoO 2(Py-S) 2, has been established by X-ray diffraction analysis. It displays catalytic activity in oxotransfer reactions from dimethyl sulfoxide (DMSO) to phosphines and phosphites in mild conditions.
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