The first crystallographically-characterised Cu(II) xanthate
Abstract The copper(II) xanthate Cu(S2COEt)2·TMEDA (1) (TMEDA = N,N-tetramethylethylenediamine) has been synthesised and is the first structurally-characterised xanthate of copper in the + 2 oxidation state. 1 has an octahedral cis, cis, cis-ligand arrangement about the metal, in which xanthate chelation is markedly asymmetric. Both bulk thermal decomposition and film growth by aerosol-assisted chemical vapour deposition (AACVD) using 1 as precursor lead to the formation of Cu2S.
1H and 19F EMR study of powdered samples of copper(II) ethylxanthate and trifluoroethylxanthate complexes magnetically diluted in the corresponding nickel(II) host lattices
Abstract Powdered samples of bis(ethyldithiocarbonato)copper(II) and bis(trifluor-ethyldithiocarbonato)copper(II) complexes magnetically diluted in the corresponding nickel(II) host lattices have been studied by 1 H and 19 F Electron Magnetic Resonance (ENDOR) spectroscopy. The values of isotropic and anisotropic components of electron-nuclear interactions with the CH 2 and CF 3 groups were extracted from the spectra. Interactions with protons from neighbouring molecules of the lattice were also recorded. With the use of computer-aided EMR spectroscopy some aspects of the geometric structure of the copper(II)-xanthate complex studied were found. The structure of the guest molecules of copper complexes appears to accept the nickel(II) host lattice structure.
Anionic complexes of some transition metals containing mixedβ-diketonato and alkylxanthato ligands
SummaryEleven complexes of the type K[M(acac)(Rxan)2] and K[M(TTA)2(Rxan)], where M=CoII or NiII, acac=acetylacetonate, TTA=thenoyltrifluoroacetonate, and Rxan=alkylxanthate, R=methyl-, ethyl-, propyl-, butyl-, or cyclohexyl-, have been prepared. The magnetic and spectral data indicate that the complexes are octa-hedral and that the xanthate group is attached in a bidentate fashion to the metal ions. The conductivity data are commensurate with the ionic character in the complexes. T.g.a. were made for some of the complexes.