5819-24-9Relevant academic research and scientific papers
Synthesis, magnetic and spectroscopic characterization of copper(II) toluate complexes with substituted piperazines
Manhas,Sardana,Kalia
, p. 171 - 179 (2008/10/09)
New copper(II) toluate complexes with the saturated heterocyclic bases [(L-L) having the tendency to coordinate through both 1 and 4 nitrogen atoms] 1-methylpiperazine, 1,4-dimethylpiperazine, 2,6-dimethylpiperazine and 1-phenylpiperazine have been prepared and characterized by physico-chemical and spectroscopic methods. All of the complexes were found to be antiferromagnetic with stoichiometries of the type Cu(OOCR)2(L-L)n (n = 1 or 0.5, R = 2-, 3-or 4-CH3C6H4) except Cu(OOCC6H4CH3-4)2(L-L) (where L-L = 2,6-dimethylpiperazine), which is magnetically dilute. The spin exchange parameter, -2J, for two of the antiferromagnetic complexes has been evaluated from magnetic susceptibility measurements at different temperatures. Binuclear copper(II) acetate monohydrate-like structure for the antiferromagnetic complexes of 1:1 stoichiometry and polymeric structure of the type Cu(OOCH) 2(dioxan)0.5 for the complexes of 1:0.5 stoichiometry have been proposed. The magnetically dilute complex has been assigned a polynuclear trans-pseudo-octahedral or polymeric square pyramidal structure. Copyright
Magnetic and spectroscopic characterization of copper(II) toluate adducts with substituted piperidines
Manhas,Sardana,Kalia
, p. 519 - 531 (2008/10/08)
New copper(II) toluate complexes with saturated monoheterocyclic bases, substituted piperidines, of the type Cu(OOCR)2L (where R = 2-, 3-, or 4-CH3C6H4 and L = 1-methyl-, 1-ethyl- or 2,6-dimethylpiperidine) have been synthesized and characterized by elemental analyses, IR, electronic reflectance and EPR spectral and magnetic susceptibility measurement studies. All of these complexes show antiferromagnetic behaviour. The spin exchange parameter, - 2J, for three of these complexes has been evaluated from EPR measurements at different temperatures, which corresponds to axial binuclear copper(II) complexes with S = 1.
Effects of Methyl Substituent on Solvent Extraction of Copper(II) with o-, m-, and p-Methylbenzoic Acids.
Yamada, Hiromichi,Horikawa, Shiho,Fujii, Yukio,Mizuta, Masateru
, p. 835 - 840 (2007/10/02)
The extraction of copper(II) with o-, m-, and p-methylbenzoic acids in 1-octanol was carried out at 25 deg C and aqueous ionic strength of 0.1 mol dm-3 (NaClO4).In contrast to the extraction with benzoic acid, in which only the monomeric copper(II) benzoate is extracted, the dimeric copper(II) species is also responsible for the extraction of copper(II) with o- and m-methylbenzoic acids in 1-octanol together with the monomeric one.On the other hand, p-methylbenzoic acid has a poorer extracting capability than o- and m-methylbenzoic acids and only the monomeric copper(II) species is responsible for the extraction.
THE DIRECT ELECTROCHEMICAL SYNTHESIS OF SOME TRANSITION METAL CARBOXYLATES
Kumar, N.,Tuck, Dennis G.,Watson, Katherine D.
, p. 740 - 743 (2007/10/02)
The transition metal carboxylates M(O2CR)n (M=Cr, R=C2H5, C6H5, n=3; M=Mn, Fe, Ni, R=CH3, C2H5, C6H5, n-C7H15, n=2, not all combinations) have been prepared by oxidising suitable metal anodes electrochemically in solutions of RCOOH in acetonitrile.With Co and Cu, a wide range of carboxylic acids (R=C2H5, c-C3H5, c-C5H9, C6H5, n-C4H9, n-C7H15, 2-ethylhexanoic, oleic, linoleic) has been used succesfully to give M(O2CR)2.The advantages of the method are discussed.The preparation of Cu(O2CR)2 involves the prior formation of CuO2CR at the anode, followed by oxidation by the solvent.
