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. Can. J. Chem. 68, 423 (1990).The electrochemical oxidation of a sacrificial anode (M = Zn, Cd, Hg, In, Sn) in non-aqueous solutions of 3-hydroxyflavone, 1'-hydroxy-2'-acetonaphthone, or 2-ethoxyphenol (= HL) gives ZnL2, CdL2, HgL, InL3, or SnL2 (not all combinations).Adducts with 2,2'-bipyridine (bpy) or N,N,N1,N'-tetramethylethanediamine (tmen) have also been prepared in some cases.Certain zinc and cadmium compounds produce paramagnetic species on exposure to the atmosphere. The structure of Zn(C15H903)2tmen has been deter@ned; the crystals are orthorhombic, space group Pbcn, cell dimensions a = 18.8 17 (2) Mots clis : synthkses klectrochimiques, ions mktalliques dl0, diffraction des rayons-X, complexe du zinc, complexe du cadmium.[Traduit par la revue] I