Amount Of PtCl2 Research Articles

Platinum-catalyzed allylation of carbon electrophiles with alkenylsilanes

In the presence of catalytic amounts of PtCl2 and AgSbF6, (Z)-alkenylsilanes react with various carbon electrophiles at the γ-position to give allylation products. A plausible mechanism for the Pt-catalyzed allylation involves alkene migration of alkenylsilanes to allylsilanes and subsequent allylation of carbon electrophiles.

Structural diversity in the coordination of 1,4‐dihydro‐1,4‐diarsinine as a cyclic ditopic organoarsenic ligand to metal ions

AbstractA number of different complexation structures of cis‐1,4‐dihydro‐1,4‐dimethyl‐2,3,5,6‐tetrakis(t‐butoxycarbonyl)‐1,4‐diarsinine (cis‐DHDAtBu) with gold(I) and iridium(III) were synthesized and characterized by 1H, 13C NMR spectra, X‐ray crystallography, and elemental analysis. Mono‐ and di‐nuclear gold(I) chloride complexes with cis‐DHDAtBu were obtained by simple addition of gold(I) chloride to cis‐DHDAtBu. A hetero‐trinuclear gold‐platinum‐gold complex (PtAu2Cl4(cis‐DHDAtBu)2) was obtained by complexation of a mononuclear platinum(II) complex (trans‐PtCl2(cis‐DHDAtBu)2), which was obtained by complexation of cis‐DHDAtBu with a half‐equimolar amount of PtCl2(PhCN)2, with a twice‐equimolar amount of gold(I) chloride. An iridium(III) complex with cis‐DHDAtBu (IrCl3(cis‐DHDAtBu)2) was prepared from hydrated iridium(III) chloride and cis‐DHDAtBu. The complex comprises a five‐membered chelate cis‐DHDAtBu and an usual monodentate cis‐DHDAtBu. The interior angles at around the arsenic and the As–C—C bond angles were significantly varied from 113.4° to 129.4° in the present crystal. These observations suggest that the flexibility of the bond angles at around the arsenic center is inherent property in the present organoarsenic compounds. © 2011 Wiley Periodicals, Inc. Heteroatom Chem 23:16–26, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/hc.20747

Synthesis of 3‐Acyl‐4‐alkenylpyrrolidines by Platinum‐Catalyzed Hydrative Cyclization of Allenynes.

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