Weakly bonded Lewis base adducts of plumbocene and stannocene: A synthetic and calculational study

David R. Armstrong, Michael A. Beswick, Natalie L. Cromhout, Christopher N. Harmer, David Moncrieff, Christopher A. Russell, Paul R. Raithby, Alexander Steiner, Andrew E.H. Wheatley, Dominic S. Wright

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The coordination of [(η-Cp)2Pb] and [(η-Cp)2Sn] by bidentate Lewis-base ligands gives the first examples of adducts of neutral p-block metallocenes. Ab initio MO calculations of [(η-Cp)2Pb·TMEDA] (1) (TMEDA = (Me2NCH2)2), [Cp2Pb·4,4′-Me2bipy] (2) (4,4′-Me2bipy = 4,4′-dimethylbipyridine), and the new complex [(η-Cp)2Sn·TMEDA] (3) confirm that despite the presence of longer Pb-N and Sn-N bonds in the solid-state structures of the TMEDA adducts, the association of TMEDA with the metallocenes is more favorable than with 4,4′-Me2bipy. This finding is a consequence of the greater reorganization energy of 4,4′-Me2bipy compared to TMEDA. The low association energies of these species can be rationalized in terms of metal lone pair/ligand lone pair repulsion.

Original languageEnglish
Pages (from-to)3176-3181
Number of pages6
JournalOrganometallics
Volume17
Issue number15
DOIs
Publication statusPublished - 20 Jul 1998

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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