The electrochemical behaviour, as studied by cyclic voltammetry and controlled potential electrolysis, of the dinitrogen-organocyanamide complexes tram-[Mo(N 2)(NCNR 2)(dppe) 2 ] (1, R = Me; 2, R = Et; dppe = Ph 2 PCH 2 CH 2 PPh 2) is reported, and the electrochemical P L ligand parameter for the cyanamides is estimated showing that they behave as effective net electron-donors with a remarkable stabilizing influence on the coordination of dinitrogen.
The cleavage of a N-H bond of the cyanamide ligand at our Mo complex, by base attack, is also corroborated by IR and NMR spectroscopies and therefore the above product from the calhodic reduction of our complex, is tentatively formulated as (raní- (Juinuca Estrutural, í 'amplexo 1, Instituto Superior Técnico, Av. Rovisco Pais, 1049- [
By cyclic vollammeiry in a methauolic solution, the amavadin model [Bu4N]2[V(HIDA|;](HIDA= tribasic form of the N-hydroxy-a.cT iminodiacetic acid) acts as an electron-transfer mediator in the elect rocal a lytic oxidation of pyrogallol (1,2,3-trihydroxybenzene) The mechanism of ihis anodic process is being investigated by digital simulation of cyclic voltammograms and a preliminary result is presented .
The behaviour of the neutral alkynyl complexes trans-[FeBr(L)(depe) 2 ] (L = −C≡C− C(=CH 2)Ph 1a, −C≡C−CPh 2 (H) 1b; depe = Et 2 PCH 2 CH 2 PEt 2) is studied by cyclic voltammetry and the electrochemical P L and E L ligand parameters for the alkynyl ligands are estimated showing that they behave as very strong net electron-donors.
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