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The reaction of the polymeric carbonyl complex RuCl 2(CO) 2 x with 2-monosubstituted and 1,2-disubstituted benzimidazoles and 1,4-bis(benzimi-dazol-2-yl)benzene (L 9) in 2-methoxyethanol produces various coloured complexes of the formulae Ru(CO) 2Cl 2(L) 2Â·xH 2O (L = 1-(o-hydroxybenzyl)-2- -(o-hydroxyphenyl)benzimidazole (L 1), 1-(o-hydroxyphenyl)benzimidazole (L 4), 1-(p-hydroxyphenyl)benzimidazole (L 5), 1-(p-chlorobenzyl)-2-p-chloro-phenyl)benzimidazole (L 7), 1-1-(dimethylamino)benzyl-2-1-(dimethyl- amino)phenylbenzimidazole (L 10), x = 0; L = 2-benzylbenzimidazole (L 8), 1,4-bis(benzimidazol-2-yl)benzene (L 9), x = 2; L = 1-(o-chlorobenzyl)-1-(o- -chlorophenyl)benzimidazole (L 6); x = 3), Ru(CO) 2Cl(L 2) 3ClÂ·3H 2O and Ru(CO) 2(L 3) 4Cl 2Â·3H 2O (L 2 = 1-(m-hydroxybenzyl)-2-(m-hydroxyphenyl)- benzimidazole; L 3 = 1-(p-hydroxybenzyl)-2-(p-hydroxyphenyl)benzimidazole). The complexes were characterized by elemental analysis, conductivity measurements, as well as infrared, electronic, 1H- and 13C-NMR spectral studies. Â© 2009 Copyright (CC) SCS

Synthesis of ruthenium(II) carbonyl complexes with 2-monosubstituted and 1,2-disubstituted benzimidazoles