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Russian Chemical Bulletin

, Volume 42, Issue 1, pp 81–87 | Cite as

The preparation and X-ray structural study of complexes that catalyze isocyanate cyclotrimerization

  • V. A. Pankratov
  • Ts. M. Frenkel
  • A. E. Shvorak
  • S. V. Lindeman
  • Yu. T. Struchkov
Physical Chemistry

Abstract

A 1∶1-complex of trinitrophenol with benzyldimethylamine (1) and a 1∶1∶1-complex, the product of the interaction of benzyldimethylamine, glycidyl phenyl ether, and phenol (2), have been synthesized and characterized by means of X-ray analysis. Complex1 is a precursor for the catalysts of selective isocyanate cyclotrimerization, while complex2 is one of those catalysts. In the crystal structure complex1 forms H-bonded cationic-anionic aggregates with proton transfer from phenol to the N-atom of the tertiary amine. Complex2 crystallizes as a monohydrate (2a) with a strong H-bond between the quaternary ammonium and phenolic components, and exists in crystals in the form of globular H-bonded dimeric hydrates. Possible pathways of dissociation of complex2a are discussed. The data obtained may be used as a basis for further interpretation of the regularities of cyclotrimerization of isocyanates catalyzed by complexes of this type.

Key words

isocyanate polycyclotrimerization catalysts X-ray analysis molecular complexes strong H-bonds 

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Copyright information

© Plenum Publishing Corporation 1993

Authors and Affiliations

  • V. A. Pankratov
    • 1
  • Ts. M. Frenkel
    • 1
  • A. E. Shvorak
    • 1
  • S. V. Lindeman
    • 1
  • Yu. T. Struchkov
    • 1
  1. 1.A.N.Nesmeyanov Institute of Organoelement CompoundsRussian Academy of SciencesMoscowRussian Federation

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