H. Weiss, F. Mohr
Oct 1, 2011
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Influential Citations
14
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Journal
Journal of Organometallic Chemistry
Abstract
Abstract The thiosemicarbazones obtained from the condensation of thiosemicarbazide or 4,4′-dimethylthiosemicarbazide with 2-acetylthiophene react with K 2 PdCl 4 in the presence of a base to give dark, poorly soluble materials in high yields. Treatment of these oligomeric compounds with Ph 3 P, dppe or dppf gives monomeric palladium(II) phosphine complexes in which the deprotonated thiosemicarbazones coordinate to the metal in a tridentate fashion through the C3-cyclometallated thiophene ring, the imine nitrogen atom and the sulphur atom. This coordination mode was confirmed by X-ray structure analysis of several derivatives.