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 A stable trinuclear mixed (organic)(organo)copper cluster: synthesis and structure of bis(benzoato)(mesityl)tricopper(I), published in 1985-09-15, which mentions a compound: 75732-01-3, Name is Mesitylcopper(I), Molecular C9H11Cu, COA of Formula: C9H11Cu.
The interaggregate exchange reaction of Cu5(C6H2Me3-2,4,6)5 with Cu4(OBz)4 in C6H6 or PhMe gave 40% of the title trinuclear cluster (I). The structure of I was determined by x-ray crystallog. anal.; results were refined to R 0.059 for 1627 reflections. I possesses 2-bridging benzoato groups and 1 bridging, 3-center, 2-electron bonded mesityl group.
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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com