Cante-Mota, Ivon published the artcileBenzimidazole-derived Calix[4]arenes with Polymerizable Styrene Groups and Their Cu(II) Complexes, Quality Control of 4760-35-4, the publication is Inorganica Chimica Acta (2013), 11-18, database is CAplus.
P-tert-Butylcalix[4]arene [C4(OH)4] was substituted with one to four benzimidazole groups at the phenolic positions affording the compounds C4(OH)3(OBzIm)-C4(OBzIm)4. The solid-state structures confirmed the cone conformation of all derivatives A tetrasubstituted calix[4]arene with two benzimidazole groups and two 4-methylenestyryl in distal positions C4(OStyr)2(OBzIm)2, which are amenable for polymerization reactions, was also obtained. The monobenzimidazole compound C4(OH)3(OBzIm) reverts to a partial-cone conformation on binding CuCl2, giving rise to the dimeric complex [C4(OH)2(OBzIm)2]2[CuCl(μ-Cl)]2 in the solid state, featuring N and O-coordination from the benzimidazole-N and ethereal-O atoms towards the Cu2+ ions placed outside the calixarene cavity. In contrast, the tetrasubstituted C4(OStyr)2(OBzIm)2 gives rise to the crystallog.-characterized monomeric complex [C4(OStyr)2(OBzIm)2CuCl2], with the cupric ion located directly above the macrocyclic cavity. This complex has 4-methylenestyryl groups at two distal phenolic positions, ideally poised for further modifications, including polymerization of the copper-containing monomer.
Inorganica Chimica Acta published new progress about 4760-35-4. 4760-35-4 belongs to imidazoles-derivatives, auxiliary class Chloride,Benzimidazole, name is 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole, and the molecular formula is C9H9ClN2, Quality Control of 4760-35-4.
Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem