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 and X-ray crystallography of nonanuclear cobalt cluster and mononuclear cobalt complex: Effect of phosphine on the formation of cobalt complexes, published in 2020-11-15, which mentions a compound: 1663-45-2, Name is 1,2-Bis(diphenylphosphino)ethane, Molecular C26H24P2, Reference of 1,2-Bis(diphenylphosphino)ethane.
Nonanuclear complex [Co{Co4(μ4-O)(1-methylimidazole-2-thiolate)6}2](BF4)2 (1) and mononuclear complex [Co(bis(1-methyl-imidazol-2-yl)disulfide)2](BF4)2 (2) were synthesized using almost the same method and characterized by X-ray diffraction study. Although almost the same method was used during synthesis, the presence and absence of phosphine produced the nonanuclear complex and mononuclear complex, resp. In addition, the mononuclear complex has bis(1-methyl-imidazol-2-yl)disulfide that can be obtained from the oxidation of 1-methylimidazole-2-thiolate ligand. Therefore, phosphine ligand could prevent the oxidation of 1-methylimidazole-2-thiolate ligand.
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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis