201022-75-5Relevant academic research and scientific papers
Modeling for the active site nitrate reductase. Oxidation of the complex [MovO(O2CC(S)CH3Ph)2]- by nitrate and nitrite in methanol
Li, Hong,Palanca, Pedro,Sanz, Vicent,Picher, M. Teresa,Navarro, Antonio
, p. 174 - 179 (2008/10/08)
Under acid conditions the [MoVIO2(O2CC(S)CH3Ph) 2]2- reacts with thiols to yield the monomeric [MoVO(O2CC(S)CH3Ph)2]- and disulfide. The reduced complex [MoVO(C2CC(S)CH3Ph)2]- can react with NO3- and NO2- in a one-electron step yielding respectively NO2 and NO and the original molybdenum(VI)-dioxo complex. The experimental pseudo-first-order rate constant with respect to the Mo(V) complex at 25°C was found to be kobs = 2.3 × 10-4s-1 for NO3- and kobs = 1.0 × 10-2s-1 for NO2-. Oxo transfers to and from the substrate have been coupled to produce a catalytic system which turns over the reaction RSH+ (NO3- or NO2-) + H+ → 1/2[RS]2 + (NO2 or NO) + H2O, in which thiols, NO3- and NO2- serve as a model substrates and molybdenum complex as a catalyst. This result has permitted us to consider the system as a possible model for the nitrate reductase 'Chlorella' (S.P. Cramer et al., J. Am. Chem. Soc., 106 (1984) 1467; G.N. Geoige et al., Biochem. J., 259 (1989) 693).
Synthesis and characterization of molybdenum(VI)-dioxo complexes containing both coordinated thiolate and carboxylate groups. Reactions with their own free ligands
Li, Hong,Palanca, Pedro,Sanz, Vicent,Picher, M. Teresa,Domingo, Luis R.,Domenech, Antonio,Folgado, Jose-Vicente
, p. 145 - 150 (2008/10/08)
The synthesis, characterization and spectroscopic properties of a group of Mo(VI) complexes having thiocarboxylate ligands of type [MoVIO2(O2CC(S)MePh-X)2] 2- have been reported (X = H, p-Me, p-Cl). The peak potential for the Mo(VI) reduction increases according to the electron-donor ability of X (Me > H > Cl). Reaction of these Mo(VI) complexes with their own free ligands has been studied by ESR and UV-Vis spectroscopy, yielding the monomeric [MoVO(O2CC(S)MePh-X)2]- as unique complex products. The kinetic study of this oxidation reaction has also been investigated.
