Metathesis of alkanes catalyzed by silica-supported transition metal hydrides

Véronique Vidal, Albert Théolier, Jean Thivolle-Cazat, Jean-Marie Maurice Basset*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

228 Scopus citations

Abstract

The silica-supported transition metal hydrides (≡Si-O-Si≡)(≡Si-O- )2Ta-H and (≡Si-O-)(x)M-H (M, chromium or tungsten) catalyze the metathesis reaction of linear or branched alkanes into the next higher and lower alkanes at moderate temperature (25°to 200°C). With (≡Si-O-Si≡)(≡Si-O-)2Ta-H, ethane was transformed at room temperature into an equimolar mixture of propane and methane. Higher and lower homologs were obtained from propane, butane, and pentane as well as from branched alkanes such as isobutane and isopentane. The mechanism of the step leading to carbon-carbon bond cleavage and formation likely involves a four-centered transition state between a tantalum-alkyl intermediate and a carbon-carbon σ-bond of a second molecule of alkane.

Original languageEnglish (US)
Pages (from-to)99-102
Number of pages4
JournalScience
Volume276
Issue number5309
DOIs
StatePublished - Apr 4 1997

ASJC Scopus subject areas

  • General

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