A One-Dimensional Coordination Polymer Based on 1H-Benzimidazole-2-methanol

A coordination polymer, [CuL]_n (HL = 1H-benzimidazole-2-methanol), has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction. The complex (C₈H₇CuN₂O) crystallizes in orthorhombic sp. gr. Pbca with a = 11.3962(13) Å, b = 9.3779(10) Å, c = 13.7003(15) Å, Z = 8. In the complex, the Cu⁺ ions and the coordination anion L^– are connected with each other to form a series of 1D CuL chains, which are further linked through interchain weak interactions (anagostic interaction and O···π interaction) to generate a wave-shaped 3D supramolecular coordination network. The agostic bond O–H⇀Cu⁺ between the Cu⁺ ion and the hydroxyl group in coordination anion L^– with the H–Cu⁺ bond length of 1.952 Å and the O1–H1–Cu1 bond angle of 140.05(1)° is observed.