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 cadmium coordination polymer with anatase topology constructed from a tetrapodal ligand. Synthesis, crystal structures and luminescence, published in 2011-02-28, which mentions a compound: 3229-00-3, Name is Pentaerythrityltetrabromide, Molecular C5H8Br4, Recommanded Product: 3229-00-3.
A tetrapodal ligand, tetrakis(3-carboxyphenoxymethyl)methane (H4L), and its Cd complex [Cd2L(H2O)4]n (1) were synthesized and structurally characterized. Crystal data: monoclinic, a = 27.521(6), b = 8.4410(9), c = 18.710(8) Å, β = 123.449(5)°, Z = 4, R1 = 0.0545, wR2 = 0.1348 [I > 2σ(I)]. Complex 1 displays a 3D (3,6)-connected anatase topol. with the Schlaefli symbol (42.6)2(44.62.88.10). At room temperature, 1 exhibits a strong emission at 396 nm upon excitation at 320 nm.
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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem