Concerning the silicon-germanium bond. The structures of isomeric Ph3EE′Me3, E = Ge, E′ = Si and E = Si, E′ = Ge

Keith H. Pannell, Ramesh N. Kapoor, Raphael Raptis, László Párkányi, Vilmos Fülöp

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The synthesis and structure of the unknown trimethylgermyltriphenylsilane (I, Ph3SiGeMe3) is reported. The molecular geometry is compared to that of the isomeric Me3SiGePh3 (II) and the related Ph3SiSiMe3 (III) and (η5-C5H5)Fe(CO)2SiMe2GePh3 (IV). The SiGe bond of I is significantly longer than that for II. We suggest that this is due to expansion of Ge bonding orbitals by the relatively electron-donating methyl groups in conjunction with the contraction of the corresponding orbitals of Si due to the electron-withdrawing phenyl groups. The overall result is a better orbital overlap between the Si and Ge atoms for II.

Original languageEnglish
Pages (from-to)41-47
Number of pages7
JournalJournal of Organometallic Chemistry
Issue number1-2
Publication statusPublished - Feb 27 1990


ASJC Scopus subject areas

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

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