Thio derivatives of β-diketones and their metal chelates. VIII. Adducts of metal chelates of fluorinated monothio-β-diketones

Abstract

Complexes of l,l,l-trifluoro-4-mercapto-4-phenylbut-3-en-2-one, PhC(SH)= CHCOCF₃, with cobalt(111), nicke1(11), palladium(11), platinum(11), copper(11), zinc(11), cadmium(11), and mercury(11) have been prepared and characterized. Their infrared spectra and the spectra of metal complexes of two other fluorinated monothio-β-diketones are discussed. Adducts of nickel (11) palladium(11), platinum(11), zinc(11), cadmium(11), mercury(11), and lead(11) complexes of the fluorinated monothio-β-diketones, RC(SH)=CHCOCF₃ (R = Ph, α-thienyl, or Me), with pyridine, α-picoline, γ-picoline, 2,2'-bipyridyl, 1,l0-phenanthroline, 2,9-dimethyl-1,l0-phenanthroline, 2,2',2"-terpyridyl, or triphenylphosphine are described. Molecular weight and visible spectral measurements on PdL₂(PPh₃)₂ (L = C₄H₃SC(SH)=CHCOCF₃) show that in nitro- benzene and toluene solution one phosphine moiety is lost. Similarly, ZnL₂ pic₂ (pic = α- or γ-picoline) loses one molecule of picoline in nitrobenzene solution. The infrared data indicate that in the adducts nickel, zinc, and probably cadmium are six-coordinate and palladium, platinum, mercury, and lead are four-coordinate, while zinc is five-coordinate in the mono-adducts ZnL₂ pic.