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 Synthesis, spectroscopic characterization and quantum chemical studies of a dioxomolybdenum(VI) complex with an N,S-substituted pyridoxal thiosemicarbazone, published in 2021-01-01, which mentions a compound: 17524-05-9, Name is Bis(acetylacetonato)dioxomolybdenum(VI), Molecular C10H14MoO6, Related Products of 17524-05-9.
The new compounds Pyridoxal N-allyl-S-methylthiosemicarbazone (L) and the dioxomolybdenum(VI) complex [MoO2(L)CH3OH] have been synthesized and characterized by elemental anal., UV-Vis, FT-IR, Raman and 1H NMR spectra, and also by the single crystal X-ray diffraction technique. Single crystals of the cis-dioxomolybdenum(VI) complex were obtained by evaporating its methanol solution According to the single-crystal X-ray diffraction investigation, the molybdenum atom in the complex is in a distorted octahedral coordination. The sixth coordination site is occupied by the oxygen atom of a methanol solvent mol. The methanol coordination between the oxygen and molybdenum atoms is the weakest bond, with a Mo-O bond length of 2.355 Å. The geometries and vibrational spectra of the pyridoxal thiosemicarbazone (L) and its complex are explained by quantum chem. calculations
Although many compounds look similar to this compound(17524-05-9)Related Products of 17524-05-9, numerous studies have shown that this compound(SMILES:O=[Mo+2]12(O=C([CH-]C(C)=O1)C)(O=C([CH-]C(C)=O2)C)=O), has unique advantages. If you want to know more about similar compounds, you can read my other articles.
Reference:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts