Spin adducts of group IVB organometallic radicals with Thioketones. an esr study

Angelo Albert, Francesco Paolo Colonna, Maurizio Guerra, Bianca F. Bonini, Germana Mazzanti, Zoltàn Dinya, Gian Franco Pedulli

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The radical adducts resulting from the reaction between group IVB organometallic radicals MR3 (M = Si, Ge, Sn; R = alkyl or aryl) and a number of thioketones of the chromone and flavone series have been investigated by ESR spectroscopy. The spectral parameters obtained for these species have been compared with those of similar adducts of the corresponding ketones. Both classes of radicals adopt an orthogonal conformation, and the differences between the former and the latter paramagnetic species can be accounted for by the different electronegativity of oxygen and sulphur. the effects of substitution of the heterocyclic oxygen with a sulphur or selenium atom on the spin density distribution are likewise explained. INDO calculations have been carried out on the model systems CH2XSiH3 (X = O, S).

Original languageEnglish
Pages (from-to)47-55
Number of pages9
JournalJournal of Organometallic Chemistry
Volume221
Issue number1
DOIs
Publication statusPublished - Nov 24 1981

ASJC Scopus subject areas

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

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