The direct electrochemical synthesis of d¹⁰ metal ion derivatives of some anionic bidentate oxygen donors

Abstract

. 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

The use of sacrificial anodes for the electrochemical synthesis of metallic complexes

“…Another possible alternative mechanism was also proposed [40,48]; it is based on a disproportonation process to give In(0) and the In(III) complex, also in acetonitrile and under a dry nitrogen atmosphere, according to:…”

“…This is an unstable species and suffers further an oxidation [44][45][46][47] or disproportionation [40,48] process in solution to give the In(III) complex.…”

The direct electrochemical synthesis of some metal derivatives of 3-hydroxy-2-methyl-4-pyrone

“…The electrochemical procedures were essentially those described in earlier papers (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11). The electrochemical cell was a 100 mL round-bottomed flask with a Schlenk arm containing the solution phase; the sacrificial metal electrode suspended by a platinum wire through the rubber septum was the anode of the cell and a second platinum wire similarly supported was the cathode.…”

Crystal structure, spectroscopic and thermal properties of [Zn(Lap)2(DMF)(H2O)] and isomorphous [M(Lap)2]n (M: Cd, Mn) complexes

“…Besides, lapachol is also considered as probable anti-cancer agent [3] and with potential to fight the trypanosomacruzi, the protozoo causing the Chagas' desease [4].…”

“…Lapachol is structurally a naphthoquinone with an unsaturated pendant chain at the C3-position and an oxydryl group at the C2-position, being described as [2-hydroxy-3-(3-methyl-2-butenyl)-1,4-naphthoquinone] [4]. In an alkaline medium, the lapachol loses the oxydryl proton and turns into a potential bidentate ligand (Lap -) with the ability to bind divalent metal ions.…”