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The intramolecular hydrogen bonds in some Schiff bases derived from cyclopropyl-, cyclobutyl- and cyclopentylamine

✍ Scribed by W. Schilf; B. Kamieński; A. Szady-Chełmieniecka; E. Grech

Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
90 KB
Volume
743
Category
Article
ISSN
0022-2860

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✦ Synopsis

Eight Schiff bases (N-(R-salicylidene)-cycloalkilamines, RZH, 5-NO 2 and 5-Br) obtained from cyclopropyl, cyclobutyl-and cyclopentylamine were investigated in terms of intramolecular hydrogen bond formation in chloroform solution and in the solid state. The relationship between cycloalkyl ring size and proton position was discussed. For the compounds which exist as OH form (salicylaldehyde and 5-bromosalicylaldehyde derivatives), no correlation between ring size and proton position in hydrogen bond was found. For 5-nitro derivatives, the structure of hydrogen bridge strongly depends on the cycloaliphatic ring size.

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