The Preparation and X-Ray Structural Study of Complexes that Catalyze Isocyanate Cyclotrimerization

Document Type

Article

Language

eng

Publication Date

1-1993

Publisher

Springer

Source Publication

Russian Chemical Bulletin

Source ISSN

1066-5285

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.

Comments

Russian Chemical Bulletin, Vol. 42, No. 1 (January 1993): 81-87. DOI.

Sergey Lindeman was affiliated with Russian Academy of Sciences at the time of publication.

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