110329-33-4Relevant academic research and scientific papers
Reduction of n-C5H11N3 catalyzed by single cubane clusters with Mo-Fe-S and Fe-S cores, mediated with methyl viologen in aqueous micellar solutions
Tanaka, Koji,Moriya, Makoto,Uezumi, Satoshi,Tanaka, Toshio
, p. 137 - 143 (2008/10/08)
The Mo-Fe-S double cubane cluster [Mo2Fe6S8(SC6H 4-p-n-C8H17)6(O2C 6Cl4)2]4- bridged by two SC6H4-p-n-C8H17-- anions is dissociated into two [MoFe3S4(SC6H4-p-n-C 8H17)3(O2C6Cl 4)L]2- (1; L = DMF, Me2CO) single cubane clusters in polar organic solvents, such as DMF and Me2CO. The solvent molecule coordinated to the molybdenum of the MoFe3S4 core is easily substituted by n-C5H11N3. In the corresponding single cubane cluster with the Fe4S4 core, [Fe4S4(SC6H4-p-n-C8H 17)4]2- (2), however, the thiolate ligand is substituted by n-C5H11N3 only in the reduced 3- state. Both 1 and 2 function as catalysts for the reduction of n-C5H11N3 by Na2S2O4 in aqueous Triton X-100 micellar solutions, giving an equal amount of n-C5H11NH2 and N2. The reduction is enhanced efficiently by the addition of methyl viologen dication (MV2+). The MV.+ radical cation formed by the reduction of MV2+ with Na2S2O4 effectively transfers electrons to 1 to reduce n-C5H11N3 not only with two electrons but also with six and eight electrons, affording N2H4 and NH3 as well as n-C5H11NH2 and N2. On the other hand, 2 catalyzes only the two-electron reduction even in the presence of MV2+ to give n-C5H11NH2 and N2, suggesting that 1 is superior to 2 as a catalyst for the multielectron reduction of n-C5H11N3.
