The cadmium β-diketonate complexes Cd(RCOCHCOR′)2 (R = CH3, R′ = CH3; R = CF3 R′ = CH3, i-C3H7, i-C4H9, t-C4H9, C6H5, 2-naphthyl) can be prepared in good yield by the direct room temperature electrochemical oxidation of the metal into a solution of the parent diketone in acetonitrile. Adducts of the type Cd(RCOCHCOR′)2L (L = 2,2′-bipyridine, 1,10-phenanthroline, N,N,N′,N′-tetramethylethylenediamine) can be prepared insitu, or by subsequent addition of the ligand to the electrolytic solution. X-ray studies show that the molecular structure of both Cd(acac)2phen and Cd(CF3COCHCOC6H5)2phen is based on a CdO4N2 kernel, distorted from octahedral stereochemistry by the bite of the ligands.
Cadmium(II) chloride reacts with toluene-3,4-dithiol (H2TDT) to give Cd (TDT), which is apparently a homopolymer in the solid state. Adducts with neutral monodentate and bidentate donors have been prepared. The structure of the salt (Ph4As)2 [Cd(TDT)2] was determined by X-ray crystallography. Crystals of this compound are monoclinic (P21/c), with a = 23.032 (4) Å, b = 12.396(4) Å, c = 22.529(5) Å, β = 111.106(2)°. The structure was refined by least-squares methods to a final R-valueof 0.0469 for 2523 "observed" reflections. The anion is a distorted tetrahedral, mononuclear species with Cd—S bond distances ranging from 2.488(5) Å to 2.531(4) Å. This anion is also a Lewis acid, forming complexes of the type [Cd(TDT)2L]2− with neutral bidentate ligands.
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