https://api.elsevier.com/content/article/pii/S0022286020308012doi:10.1016/j.molstruc.2020.1284761-s2.0-S002228602030801210.1016/j.molstruc.2020.128476S0022-2860(20)30801-2Molecular structure and electron distribution of 4-nitropyridine N-oxide: Experimental and theoretical study of substituent effects Journal of Molecular StructureJournal002228602020-10-055 October 20200falsefalse