Inorganic Chemistry, Vol.56, No.24, 14900-14911, 2017
Ru-Complex Framework toward Aerobic Oxidative Transformations of beta-Diketiminate and alpha-Ketodiimine
The impact of the {Ru(acac)(2)} (acac(-) = acetylacetonate) framework on the transformations of C-H and C-H/C-C bonds of coordinated beta-diketiminate and ketodiimine scaffolds, respectively, has been addressed. It includes the following transformations involving {Ru(acac)(2)} coordinated beta-diketiminate in 1 and ketodiimine in 2 with the simultaneous change in metal oxidation state: (i) insertion of oxygen into the C(sp(2))-H bond of beta-diketiminate in 1, leading to the metalated ketodiimine in 2 and (ii) Bronsted acid (CH3COOH) assisted cleavage of unstrained C(sp(2))-C(sp(2))/C=N bonds of chelated ketodiimine (2) with the concomitant formation of intramolecular C-N bond in 3, as well as insertion of oxygen into the C(sp(3))-H bond of 2 to yield -CHO function in 4 (-CH3 -> -CHO). The aforesaid transformation processes have been authenticated via structural elucidation of representative complexes and spectroscopic and electrochemical investigations.