Abstract
cis-1 [RuCl(QN)(QN′)NO] (HQN or HQN′ = 8-quinolinol, 5-chloro-, 5,7-dichloro-, 2-isopropyl-, 2-ethyl-, 2,4-dimethyl- or 2-methyl-8-quinolinol) complexes and the corresponding trans complexes were prepared. The cis-1 to trans and the trans to cis-1 photo-induced isomerizations were carried out to investigate the substituent effect of the 8-quinolinolato ligands on the isomerization and to elucidate the mechanism. The molar ratio of trans to cis-1 isomer for the isomerization was compared among [RuCl(QN)(QN′)NO], [RuCl(QN′) 2NO] and [RuCl(QN) 2NO]. The results clearly indicate that the chloro group and bulkiness of the alkyl group in the 8-quinolinolato ligands influence on the isomerization.
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