Is there substituent cross-interaction effect in all the conjugated systems containing CN polar bond? The substituent effects on the NMR chemical shifts of 2,5-disubstituted pyrimidines

Is there substituent cross-interaction effect in all the conjugated systems containing CN polar bond? The substituent effects on the NMR chemical shifts of 2,5-disubstituted pyrimidines

Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 1155, 5 March 2018, Pages 143-151

Hua Yuan, Yan Zhang, Chun-Ni Chen, Meng-Yang Li,