Synthesis, structural characterization and solvatochromic studies of a series of Schiff base-containing triosmium alkylidyne carbonyl clusters

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Abstract

A series of new Schiff base-containing triosmium alkylidyne carbonyl clusters [Os3(μ-H)2(CO)9(μ3-CNC5H4CH=NC6H4R)] (R = H, NMe2, SMe, CMe3, NH2, Br, Cl, OCnH2n+1, n = 1, 6, 7 or 9) have been prepared by reaction of [Os3(μ-H)3(CO)9(μ3-CCl)] with one equivalent of 1,8-diazabicyclo[5.4.0]undec-7-ene in the presence of a ten-fold excess of the Schiff base ligands NC5H4CH=NC6H4R at room temperature. Analogous triosmium carbonyl clusters bearing 4′-methoxy-4-stilbazole or 4-(4-nitrobenzyl)pyridine moiety at the apical carbon centre have also been synthesized using a similar deprotonation method. The molecular structures of selected complexes have been established by X-ray crystallography. UV-vis spectroscopy suggests that this class of compounds displays significant negative solvatochromic effect in an organic medium.
Original languageEnglish
Pages (from-to)48-57
Number of pages10
JournalJournal of Organometallic Chemistry
Volume584
Issue number1
DOIs
Publication statusPublished - 10 Jul 1999
Externally publishedYes

Keywords

  • Alkylidyne
  • Clusters
  • Crystal structures
  • Osmium
  • Solvatochromism

ASJC Scopus subject areas

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

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