Polar effects on 13 C NMR chemical shifts and rotational barriers of amides. A dual substituent parameters analysis of N, N-dimethyl-3-(5-substituted-2-furyl)- …

Z Friedl, S Böhm, I Goljer, A Piklerová…

Index: Friedl, Zdenek; Boehm, Stanislav; Goljer, Igor; Piklerova, Anna; Poorova, Daniela; et al Collection of Czechoslovak Chemical Communications, 1987 , vol. 52, # 2 p. 409 - 424

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Citation Number: 12

Abstract

Abstract 13 C NMR chemical shifts were measured for sixteen N, N-dimethyl-3-(5-substituted- 2-furyl)-acrylamides in CDCl 3 at 21 C; the barriers of rotation about the CN bond ΔG c were determined by using the 1 H NMR coalescence method, and the positions of the IR bands of the ν (C= O) stretching vibrations were measured. The dual substituent parameters (DSP) analysis of the 13 C NMR chemical shifts for atoms of the vinylcarboxamide side chain-C ( ...