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 NaRb7(Si4-xGex)2 – Soluble Zintl Phases Containing Heteroatomic Tetrahedral [Si4-xGex]4- Clusters, published in 2013, which mentions a compound: 75732-01-3, Name is Mesitylcopper(I), Molecular C9H11Cu, Computed Properties of C9H11Cu.
The quaternary phases NaRb7(Si4-xGex)2 (x = 1-3) crystallize with an NaRb7Ge8-type structure and contain tetrahedral four-atom clusters that consist of Si and Ge atoms. The quaternary phases possess larger cell volumes with increasing Ge amount The formation of heteroat. [Si4-xGex]4- clusters is indicated by chem. different Si environments, which were analyzed by solid-state 29Si MAS (magic-angle spinning) NMR spectroscopy of a 29Si-enriched NaRb7(Si4-xGex)2 sample with x = 0.5 as well as quantum chem. calculations of the NMR coupling parameters. NaRb7(Si4-xGex)2 represents another rare example of a phase with exclusively tetrahedral clusters that readily dissolves in liquid ammonia. The nature of the heteroat. clusters was further investigated by dissolution of NaRb7(Si4-xGex)2 with x = 2 in liquid ammonia. In the presence of MesCu (Mes = mesityl) and 18-crown-6 as a sequestering agent, crystals with the composition [Rb(18-crown-6)]2Rb2[(MesCu)2(Si4-xGex)](NH3)11 were isolated with x = 2.2(1). [(MesCu)2(Si4-xGex)]4- represents another isomer of a MesCu-stabilized tetrahedral anion and supports the observation that Zintl phases, which contain solely tetrahedranide subunits, represent a new class of soluble Zintl phases.
Although many compounds look similar to this compound(75732-01-3)Computed Properties of C9H11Cu, numerous studies have shown that this compound(SMILES:[Cu]C1=C(C)C=C(C)C=C1C), has unique advantages. If you want to know more about similar compounds, you can read my other articles.
Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com