Schiff base chemistry of the {ReO}3+ core: Structural characterization of the unusual '3 + 2' complex [ReO(η3-OC6H4-CH=NC6H4-2-S)(η2-OC6H4C=NC6H4-2-S)]

Xiaoyuan Chen, Frank J. Femia, John W. Babich, Jon Zubieta

Research output: Contribution to journalArticle

31 Scopus citations

Abstract

The reaction of [ReOCl3(PPh3)2] with salicylaldehyde-2-mercaptoanil (1) in methanol yields [ReO(OCH3)(PPh3)(η3-OC6H4CH=NC6H4S)] (3). Reaction of 3 with 2-(2-hydroxyphenyl)benzothiazole (2) produces [ReO(η3-OC6H4CH=NC6H4S)(η2-OC6H4C=NC6H4S)] (4) in good yield. Compound 4 may also be prepared directly from the reaction of [ReOCl3(PPh3)2] with excess 1, after prolonged reaction times in the presence of atmospheric oxygen. The structure of 3 exhibits a distorted octahedral Re(V) center coordinated to a terminal oxo-group, a methoxy ligand, a triphenylphosphine ligand, and the N, O and S donors of the tridentate Schiff base ligand. The octahedral geometry of 4 is defined by the terminal oxo-group, the N, O and S donors of the tridentate Schiff base ligand, and the N and O donors of the bidentate 2-(2-hydroxophenyl)benzothiazole ligand. Oxidation and cyclization of the Schiff base salicylaldehyde-2-mercaptoanil to produce 2-(2-hydroxyphenyl)benzothiazole is precedented and in this instance may be driven by the formation of the robust '3 + 2' complex 4. (C) 2000 Elsevier Science S.A.

Original languageEnglish (US)
Pages (from-to)149-153
Number of pages5
JournalInorganica Chimica Acta
Volume307
Issue number1-2
DOIs
StatePublished - Sep 11 2000

Keywords

  • Crystal structures
  • Oxorhenium complexes
  • Schiff base complexes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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