
TY  - JOUR
A1  - Rae, ID 
T1  - Aromatic amides. XI. 1,3-Phenylenediamines and their diacyl derivatives
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1978
VL  - 31
IS  - 8
SP  - 1851
EP  - 1854
KW  - 
UR  - https://doi.org/10.1071/CH9781851 
N2  - In 4,6-disubstituted N,N'-(1,3-phenylene)bispivalamides, the ring hydrogen between the two amide groups is deshielded by both and consequently shows its 1H nuclear magnetic resonance at extremely low field. Preferential stabilization of a particular amide configuration by dipole-dipole interactions gives rise to differential shielding effects in N,N'-(4-chloro-1,3-phenylene)bispivalamide and to strong deshielding of the aromatic C5-H in N,N'-(2-methylthiopyrimidine-4,6-diyl)bispivalamide. 
ER  -

