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 Binder properties of the metal fluoride-hydrogen fluoride-water system, published in 1973, which mentions a compound: 13940-83-5, Name is Nickel(ii)fluoridetetrahydrate, Molecular F2H8NiO4, Recommanded Product: 13940-83-5.
The binding properties of the MFm-HF-H2O system were investigated, where M is Na, K, Mg, Co, Ni, or Zr and m an integer. The systems KF-HF-H2O and ZrF4-HF-H2O had the highest yield strength, showing promising tech. utilization.
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Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider