So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Wasylina, L.; Puszko, A. researched the compound: 3,5-Dimethyl-4-nitropyridine 1-oxide( cas:14248-66-9 ).Application In Synthesis of 3,5-Dimethyl-4-nitropyridine 1-oxide.They published the article 《Electronic spectra and structure of methyl derivatives of 4-nitropyridine N-oxide》 about this compound( cas:14248-66-9 ) in Chemistry of Heterocyclic Compounds (New York)(Translation of Khimiya Geterotsiklicheskikh Soedinenii). Keywords: methylnitropyridine oxide dipole moment intramol charge transfer. We’ll tell you more about this compound (cas:14248-66-9).
The UV spectra of seven Me derivatives of 4-nitropyridine N-oxide in ethanol have been examined The electronic spectra were calculated by a modified INDO method. Transition energies, intensities and assignments were compared with UV spectra. Spectroscopic manifestations of intramol. interaction indicate that Me groups modify the electronic interaction between the N-oxide and NO2 groups mainly through a steric strain.
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Reference:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem