Protonation equilibrium and hydrogen production by a dinuclear cobalt-hydride complex reduced by cobaltocene with trifluoroacetic acid.
A dinuclear Co complex with bis(pyridyl)pyrazolato (bpp(-)) and terpyridine (trpy) ligands, [Co(III)2(trpy)2(μ-bpp)(OH)(OH2)](4+) (1(4+)), undergoes three-electron reduction by cobaltocene in acetonitrile to produce 1(+), which is in the protonation equilibrium with the Co(II)Co(III)-hydride complex, and the further protonation of the hydride by trifluoroacetic acid yields hydrogen quantitatively. The kinetic study together with the detection of the Co(II)Co(III)-hydride complex revealed the mechanism of the hydrogen production by the reaction of 1(+) with trifluoroacetic acid.
Department of Bioinspired Science, Department of Chemistry and Nano Science, Ewha Womans University , Seoul 120-750, Korea.
Sukanta
S
Mandal
Shinya
S
Shikano
Yusuke
Y
Yamada
Yong-Min
YM
Lee
Wonwoo
W
Nam
Antoni
A
Llobet
Shunichi
S
Fukuzumi
D003035:Cobalt / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry*; D007700:Kinetics; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D011522:Protons; D014269:Trifluoroacetic Acid / Q000737:chemistry*
D009942:Organometallic Compounds; D011522:Protons; D003035:Cobalt; D006859:Hydrogen; D014269:Trifluoroacetic Acid