Reaction of silylcobalt tetracarbonyls with oxiranes. Kinetics and mechanism

József Kreisz, Attila Sisak, László Markó, Ferenc Ungváry

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It has been shown that (β-silyloxyacyl)cobalt tetracarbonyls are formed in the reaction between silylcobalt tetracarbonyl, terminal oxirane, and carbon monoxide. The linear acyl isomer is obtained with a regioselectivity of about 80%, which is practically independent of the nature of the substituents in the silyl group. Kinetic studies have revealed a first order dependence on Ph3SiCo(CO)4, an increasing order with respect to ethyloxirane, and zero order with respect to [Co(CO)4]- and CO. A mechanism involving a rapid formation of a tight ion pair, rate-determining internal SN2 type substitution, and fast insertion of CO is suggested.

Original languageEnglish
Pages (from-to)53-57
Number of pages5
JournalJournal of Organometallic Chemistry
Issue number1-2
Publication statusPublished - Jun 1 1993


ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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