Photochemistry of deprotonated rhenium(I) (3,3′-dihydroxy-2,2′-bipyridine) tricarbonyl chloride. Photoisomerization at the chelate in basic solution

In basic solution the complex Re(I) [bipy(OH)(2)] (CO)(3)Cl with bipy(OH)(2) = 3,3'-dihydroxy-2,2'-bipyridine is deprotonated at one of the phenolic OH substituents. Upon irradiation of the anion {Re[bipy(OH)(O)](CO)(3)Cl}(-) the yellow solution becomes reddish brown. It is suggested that the photolysis is associated with an isomerization at the chelate from N,N to N,O coordination. (C) 2014 Elsevier B.V. All rights reserved.