5819-25-0Relevant articles and documents
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 (1988)
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.
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.
A mixed bridged trinuclear copper(II) complex with diethylaminoethanolato and 3-methylbenzoato ligands
Gehring, Stefan,Haase, Wolfgang,Paulus, Helmut
, p. 1814 - 1816 (2008/10/08)
Bis[μ-2-(diethylamino)ethanolato-O,N]- bis(methanol)-bis(μ-3- methylbenzoato-O,O')-bis(3- methylbenzoato-O)-tricopper(II), [Cu 3(C6H14NO)2 - (C8H 7O2)4 (CH4O)2], M r = 1027·6, monoclinic, P21/c, a = 8·302 (2), b = 30·794 (8), c = 10·688 (3) A, β = 110·12 (1)°, V= 2565· 7 A3, Z= 2, D x = 1·330 Mg m-3, λ(Mo Kα) = 0·71073 A, μ = 1·231 mm-1, F(000) = 1074, T= 297 K. Final R = 0·059 for 3145 independent reflections [Fo > 2σ(Fo)]. Linear Cu3 arrangement; adjacent copper centres are bridged by a bidentate carboxylato group and an aminoethanolato oxygen atom.
