3- methyl-4-nitropyridine-/V-oxide

See 3-Methyl-4-nitropyridine /V-oxide Acetic acid, Jute... 

Fig. 17. (a) Orientation of molecular dipole moments in 3-methyl-4-nitropyridine /V-oxide /t, molecular dipole moment from direct integration methods 1x2, from multipolar model and fx from semi-empirical calculation, (b) Electrostatic potential around the molecule in the plane of ring atoms. Contours at 0.2kcal/mol (reproduced with permission from Hamazaoui et al. [79]). 

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