학술논문
1H NMR spectroscopy of the hydrogen-bonded imide groups of hub(M)3:3CA provides a useful method for the characterization of these aggregates
Document Type
Academic Journal
Source
Journal of Organic Chemistry. August 26, 1994, Vol. 59 Issue 17, p4904, 6 p. chart
Subject
Language
ISSN
0022-3263
Abstract
Examination of VT-1H NMR spectrum between 13 and 16 ppm region of hydrogen-bonded aggregates of trismelamine (hub(M)3) and iso-cyaminic acid (CA) shows the existence of a symmetric C3 isomer and an asymmetric C1 isomer. Structure of CA molecules influences the ratio of isomers while solvents exhibit little influence. Nuclear Overhauser effects demonstrate N-H connectivity and that the C3 isomer is predominant over C1 isomer. Energy barrier for exchange of hydrogen-bonded imide protons between different CA groups is less than that for the interconversion between C3 and C1 isomers.