Abstract
Ruthenium carbonyl o-phenylene complexes, Ru(CO)(3,6-Bu 2seq)(trpy)]PF 6 ([ 1]PF 6) and [Ru(CO)( o-monothiocat)(trpy)] ( 2), were prepared by the reaction of [Ru(CO)Cl 2(trpy)] with the corresponding o-phenylenes in 2-methoxyethanol. X-ray crystallographic study of [ 1]BF 4 indicated that the ruthenium center is coordinated by carbonyl, three nitrogens of trpy and two oxygens of 3,6-Bu 2seq. ESR of [ 1]PF 6 and 2 indicated that the electronic structures of ruthenium- o-phenylene unit of the complexes have Ru(II)-3,6-Bu 2seq and Ru(II)- o-monothiocat forms, respectively. Significant differences in the redox behavior and the spectroscopical properties between [ 1]PF 6 and 2 and [RuCl(3,5-Bu 2seq)(trpy)] were ascribed to the strong interaction between o-phenylene and carbonyl ligands through Ru(II).
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