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 Lewis Base Adducts of Barium/Copper tert-Butoxides: Synthesis and Thermolysis of [BaCu2(OtBu)4]n and [L2Ba2Cu4(OtBu)8] (L = Me3NO and Et3PO). X-ray Crystal Structure of [(Me3NO)2Ba2Cu4(OtBu)8], published in 1997-04-30, which mentions a compound: 75732-01-3, Name is Mesitylcopper(I), Molecular C9H11Cu, Name: Mesitylcopper(I).
Reaction of copper(I) mesityl with [Ba(OtBu)2(t-BuOH)2]4 yields insoluble [BaCu2(OtBu)4]n, which dissolves by adduct formation (L = Me3NO or Et3PO) to form soluble L2Ba2Cu4(OtBu)8. For L = Me3NO, this mol. is shown by x-ray diffraction to have a structure based on a trans-Ba2Cu4 octahedron, with all Ba/Cu edges bridged by μ2-OtBu units; one L binds to each Ba (monoclinic, space group P21/c, R = 0.0822). Bulk thermolysis, TGA, and product anal. revealed that OtBu units undergo not only O/C cleavage but also C/C cleavage, the latter to form carbonate and nonvolatile hydrocarbon products, in addition to BaO and CuO. The intended oxidant Me3NO shows no great tendency to oxidize Cu(I).
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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com