A copper(I) dimer Cu(L)(CH3CN)2(BF4)2 with the new chelating and bridging tridentate ligand 1-(2-pyridylmethyl)-2-(2-pyridyl)benzimidazole (L). Inorganic Chemistry Communications, (3)4:182--184, 2000. [PUMA: acetonitrile benzimidazole copper dinuclear dinuclear;electrochem oxidn prepn pyridyl pyridylmethyl pyridylmethylpyridylbenzimidazole redn structure structure;copper structure;crystal]