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N,N′-Linked 1,2-ethanediyl-poly(benzimidazolin-2-ones) and the X-ray crystal structure of a benzimidazolin-2-one trimer

✍ Scribed by Enrique Díez-Barra; Julio Dotor; Antonio de la Hoz; Concepción Foces-Foces; Christine Enjalbal; Jean Louis Aubagnac; Rosa María Claramunt; José Elguero

Book ID: 104207829
Publisher: Elsevier Science
Year: 1997
Tongue: French
Weight: 785 KB
Volume: 53
Category: Article
ISSN: 0040-4020
DOI: 10.1016/s0040-4020(97)00434-1

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✦ Synopsis

A series of N,N'-linked 1,2-ethanediyl-poly(benzimidazolin-2-ones) that can be classified as podands, are described. Seven dimers (21-27), three trimers (28-30), a cyclic tetramer ( 31) and an open-chain benzimidazolin-2-one heptamer (32) have been prepared and characterized by 1H, 13C NMR and by MS. The crystal and molecular structure of the trimer, 1,3-bis-2-(2oxobenzimidazol-1-yl)ethyl-2-oxobenzimidazole monohydrate (30) has been solved by X-Ray analysis. The benzi-midazolin-2-one fragments display a pattern of bond distances and angles similar to that of analogue derivatives retrieved form the CSD. The molecules are hydrogen bonded to four others in a continuous two-dimensional network by N-H".O=C and C-H...O=C interactions in which all N-H donors and O=C acceptors are involved.

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