Synthesis, structure, and heterogeneous catalytic activity of tungsten chalcogenide cubane cluster containing alkaline earth metal complex

Ji Young Kwon, Youngmee Kim, Sung Jin Kim, Sun Hwa Lee, Han Kwak, Cheal Kim

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12 Scopus citations

Abstract

A new compound containing a cubane tungsten chalcogenide cluster [W43-Te)4(CN)12]6- and Ca2+ complex units has been prepared by the reaction of aqueous solution of K6[W43-Te)4(CN)12] · 5H2O with the solution of a Ca(NO3)2 and phen(1,10-phenanthroline) (1:2 molar ratio) in a solvent mixture of H2O/EtOH. The structure of [{Ca(phen)2(H2O)}{Ca(phen)(H2O)4}{Ca(phen)2(H2O)3}][W4Te4(CN)12] · 5H2O 1 has been determined by X-ray crystallography. Compound 1 contains [{Ca(phen)(H2O)4}{Ca(phen)2(H2O)3}][W43- Te)4(CN)12] units bridged by {Ca(phen)2(H2O)}2+ units to form an one-dimensional zigzag chain structure. Interestingly, compound 1 showed a heterogeneous catalytic activity in the transesterification of a range of esters with methanol under the mild conditions. Moreover, it can be reused without any loss of activity through 10 runs with ester.

Original languageEnglish
Pages (from-to)1885-1890
Number of pages6
JournalInorganica Chimica Acta
Volume361
Issue number7
DOIs
StatePublished - 20 May 2008

Keywords

  • Alkaline earth metal complex
  • Heterogeneous catalytic activity
  • K[WTe(CN)] · 5HO
  • Transesterification

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