Combining coordination chemistry with hydrogen bonds: Perturbation of the structures by interaction of an organotin(IV) complex with O-donor solvent molecules

Andrea Deák, Szilvia Kárpáti, György Vankó, Alajos Kálmán, Ionel Haiduc

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We have examined the role of different solvents in the crystallisation process of cis-octahedral, diphenyltin(IV)-bis-cupferronato complex, Ph 2Sn(cupf)2 (1), where cupf=PhN2O2-. The Mössbauer spectra of frozen chloroform solution of 1 revealed the presence of cis and trans isomers. This cis-trans isomerisation was investigated by Mössbauer spectroscopy and the results inspired the synthesis of two new heptacoordinated derivatives: Ph2Sn(cupf)2(H2O) (2) and Ph 2Sn(cupf)2(EtOH) • EtOH (3). In both compounds, the O-donor solvent molecules (H2O, EtOH) form novel Sn-O bonds with the Ph2Sn(IV) centre of 1, consequently the phenyl groups attached to tin undergo an intramolecular rearrangement. Compound 2 contains O-H⋯O hydrogen bonded infinite chains. In compound 3, O-H⋯O hydrogen-bonds and short O⋯O contacts assemble the complexes and uncoordinated solvent molecules into dimeric supramolecules. These solvents have structure-determining roles at both molecular and supramolecular levels: at molecular level the coordination of solvent determines intramolecular rearrangement by changing the conformation of the parent unsolvated complex, whilst at supramolecular level they control the association of solvated molecules via hydrogen bonds.

Original languageEnglish
Pages (from-to)1012-1018
Number of pages7
JournalInorganica Chimica Acta
Volume358
Issue number4
DOIs
Publication statusPublished - Mar 1 2005

Keywords

  • Crystal engineering
  • Molecular switch
  • Organotin(IV)-complexes
  • cis-trans isomerisation

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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