%0 Journal Article %1 Knodler.2000 %A Knodler, A. %A Hubler, K. %A Sixt, T. %A Kaim, W. %D 2000 %J Inorganic Chemistry Communications %K acetonitrile benzimidazole copper dinuclear dinuclear;electrochem oxidn prepn pyridyl pyridylmethyl pyridylmethylpyridylbenzimidazole redn structure structure;copper structure;crystal %N 4 %P 182--184 %R 10.1016/S1387-7003(00)00042-3 %T 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) %V 3 %X Reaction of 1,2-phenylenediamine with 2-pyridinecarboxaldehyde gave the new compd. 1-(2-pyridylmethyl)-2-(2-pyridyl)benzimidazole (L) which reacted with [Cu(CH3CN)4](BF4) to form the complex [Cu(L)(CH3CN)]2(BF4)2. Although the imine/2-(2-pyridyl) ('a-diimine') coordination setting in L appears well suited for forming a five-membered chelate ring, the crystal structure anal. of the bis(methanol) solvate revealed that the system rather opts for the formation of a partially satd. eight-membered chelate ring involving both pyridyl groups with a twist angle of 61.8° between the benzimidazole and 2-(2-pyridyl) moieties. L acts as a tridentate ligand, effecting dimerization of two chelate rings through the imine nitrogen centers of the imidazole groups. This dimerization gives rise to a ten-membered dimetalla ring. Tetracoordination at copper(I) is complemented by acetonitrile. The preference for this structure is attributed to the formation of unstrained metal centers with N-Cu-N angles between 105° and 118° and Cu-N distances of 2.03-2.05 \AA. [on SciFinder(R)]

@article{Knodler.2000, abstract = {Reaction of 1,2-phenylenediamine with 2-pyridinecarboxaldehyde gave the new compd. 1-(2-pyridylmethyl)-2-(2-pyridyl)benzimidazole (L) which reacted with [Cu(CH3CN)4](BF4) to form the complex [Cu(L)(CH3CN)]2(BF4)2. Although the imine/2-(2-pyridyl) ('\textgreek{a}-diimine') coordination setting in L appears well suited for forming a five-membered chelate ring, the crystal structure anal. of the bis(methanol) solvate revealed that the system rather opts for the formation of a partially satd. eight-membered chelate ring involving both pyridyl groups with a twist angle of 61.8° between the benzimidazole and 2-(2-pyridyl) moieties. L acts as a tridentate ligand, effecting dimerization of two chelate rings through the imine nitrogen centers of the imidazole groups. This dimerization gives rise to a ten-membered dimetalla ring. Tetracoordination at copper(I) is complemented by acetonitrile. The preference for this structure is attributed to the formation of unstrained metal centers with N-Cu-N angles between 105° and 118° and Cu-N distances of 2.03-2.05 {\AA}. [on SciFinder(R)]}, added-at = {2022-06-15T11:26:56.000+0200}, author = {Knodler, A. and Hubler, K. and Sixt, T. and Kaim, W.}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/28d4a42d89cbd4a993a6f16f84d3cc840/huebleriac}, doi = {10.1016/S1387-7003(00)00042-3}, interhash = {7f79f8c5f4562c6769550768984b5799}, intrahash = {8d4a42d89cbd4a993a6f16f84d3cc840}, issn = {1387-7003}, journal = {Inorganic Chemistry Communications}, keywords = {acetonitrile benzimidazole copper dinuclear dinuclear;electrochem oxidn prepn pyridyl pyridylmethyl pyridylmethylpyridylbenzimidazole redn structure structure;copper structure;crystal}, number = 4, pages = {182--184}, timestamp = {2022-06-15T09:26:56.000+0200}, title = {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)}, volume = 3, year = 2000 }