Deuterium isotope effects as evidence for substituent perturbation of the π??electron frame in benzanilides

…, V Pérez??Alvarez, P Joseph??Nathan…

Index: Morales-Rios, Martha S.; Perez-Alvarez, Victor; Joseph-Nathan, Pedro; Zepeda, L. Gerardo Magnetic Resonance in Chemistry, 1994 , vol. 32, # 5 p. 288 - 291

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Citation Number: 7

Abstract

Abstract Deuterium isotope effects on 13 C nuclear shielding, n ΔC (D), transmitted across a D-labelled nitrogen atom were investigated for a series of para-substituted benzanilides. The two two-bond isotope shifts, 2 ΔC (D) are perturbed essentially in a trough-bond manner by change of the contribution of mesomeric structures. The magnitudes of 2 Δ (C [DOUBLE BOND] O) and 2 Δ (C-1′) are found to be mutually interdependent as evidenced by the ...