By reaction of acetonitrile solution of 1-allyl-4-benzimidazole, iodine and copper under alternating current technique in 1 day the dark red crystals of [(C 7 H 5 N 2 (C 3 H 5 )) 4 Cu 4 I 4 ] (I) compound was obtained and structurally characterized by X-ray single crystal method: space group , Z = 2, a = 11,3260(5), b = 12,2730(5), c = 16,3601(6) Å, α = 96,407(3), β = 95,572(3), γ = 99,260(4) o , V = 2215,1(2) Å 3 , r обч. = 2,089 г/см 3 , New Gemini, Dual , m(Mo K a ) = 4,72 мм −1 , empirical absorption correction, q max. = 29,0°, 26095 measured, 9674 used reflections, R ( F 2 ) = 0,024, Rw ( F 2 ) = 0,053, S = 1,07. Structures was solved by direct methods and refined by least-squares method on F 2 by SHELXL-2014 with following graphical user interfaces of OLEX 2 . In the crystal structure of compound I, the copper(I) atoms possess a deformed tetrahedral coordination environment formed by nitrogen atom (Cu-N distances 1,990–2,014 Å) of organic ligand and three iodine atoms (Cu-I distances 2,629–2,787 Å). Due to the fact that each I atom of four independent ones connects three copper(I) atoms, globular units {Cu 4 I 4 } – are appearing. Bonding of nitrogen atom of ligand moieties with Cu(I) closed coordination environments causes an appearance of the {C 7 H 5 N 2 (C 3 H 5 )CuI} 4 topological block. An interesting feature of the compound structure is the lack of coordination of copper atoms with the unsaturated C=C bond of the allyl group of the 1-allyl-1H-benzimidazole cation. This feature of the crystal structure topology can be explained by a steric hindrance from iodine atoms and the extremely weak power of hydrogen and Cu....Cu contacts. Confirmation of this approval is the lack of literature information about π-complexes of Cu(I), in which the coordination environment of metal atoms included three iodide ions together with C=C bond. Keywords : 1-allyl-1H-benzimidazole, copper(І), iodine coordination compounds, crystal structure.