J. Spychala et Dw. Boykin, NATURAL-ABUNDANCE O-17 NMR INVESTIGATION OF 4-SUBSTITUTED N-METHYLBENZAMIDES AND N,N-DIMETHYLBENZAMIDES - DIMINUTION OF SUBSTITUENT EFFECTSBY TORSION-ANGLE TWIST, Journal of chemical research. Synopses, (10), 1993, pp. 426-427
Natural abundance O-17 NMR spectroscopic data for eleven N-methylbenza
mides (1a-k) and eleven N,N-dimethylbenzamides (2a-k) obtained at 75-d
egrees-C in acetonitrile solution are correlated with Hammett sigma+ c
onstants; rho+ values for the two systems are 6.7 and 2.2, respectivel
y,