(alpha-Imino acidato)ruthenium(II) complexes, [Ru-II{N(R(2))=C(R(2))CO2}L(2)](+) (R(1) = R(2) = Me or R(1) = R(2) = -(CH2)(3)(-); L = 2,2’-bipyridine (=bpy) or 1,10-phenanthroline (=phen)), were obtained by anodic oxidation at a constant potential of the corresponding (alpha-amino acidato)ruthenium(II) complexes, N-methylalaninato or prolinato complexes, in good to excellent yields. (alpha-Imino acidato)ruthenium(II) complexes are stable in neutral or acidic aqueous solution. The half-wave potentials of alpha-imino acidato complexes are 0.73-0.78 V (vs SCE), which are more positive than those of the corresponding alpha-amino acidato complexes, 0.55-0.59 V. The crystal structure of [Ru(pro-H-2)(bpy)(2)]ClO4 . 3H(2)O (pro-H-2 = 1,2-didehydroprolinato) has been determined by single-crystal X-ray analysis. Crystallographic data : space group C2/c, a = 21.73(1) Angstrom, b = 19.33(1) Angstrom, c = 14.58(2) Angstrom, beta = 114.91(5)degrees, Z = 8, R = 0.0352. The length of the C=N double bond of the a-imino acidate moiety is 1.294(5) Angstrom, and Ru-N(imino nitrogen) = 2.042(3) Angstrom. The chelate ring of the alpha-imino acidato ligand is planar.