In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Proton polarizability of intramolecular hydrogen bonds with molecules nonconjugated and conjugated between donor and acceptor groups, published in 1980-11-01, which mentions a compound: 1127-45-3, Name is 8-Hydroxyquinoline 1-oxide, Molecular C9H7NO2, Computed Properties of C9H7NO2.
IR and NMR spectroscopy was used to study proton polarizability in compounds [o-RC6H4CO2H, R = Me2NCH2 or Me2N; I, R1 = CH2OH or OH; and II] with intramol. H bonds. When the H-bond donor and acceptor groups are not electronically conjugated, IR continua indicate a large proton polarizability. When they are conjugated the continua are very weak. Thus, not only the proton potential but also the dependence of the dipole moment on the vibrational coordinate is decisive for occurrence of the continua.
Compound(1127-45-3)Computed Properties of C9H7NO2 received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(8-Hydroxyquinoline 1-oxide), if you are interested, you can check out my other related articles.
Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider