13476-79-4

Usage

InChI:InChI=1/2C6H12O2.Cu/c2*1-2-3-4-5-6(7)8;/h2*2-5H2,1H3,(H,7,8);/q;;+2/p-2

Upstream product

• 19455-00-6 potassium hexanoate 
• 7758-99-8 copper(II) sulfate 
• 10051-44-2 sodium caproate 
• 142-71-2 copper diacetate 
• 142-62-1 hexanoic acid 
• 20427-59-2 copper hydroxide 

Relevant academic research and scientific papers

Trinuclear triangular copper(II) clusters - Synthesis, electrochemical studies and catalytic peroxidative oxidation of cycloalkanes

The reactions of CuII carboxylates (valerate, 2-methylbutyrate, hexanoate, heptanoate) with pyrazole (Hpz) in EtOH or EtOH/water solutions easily afford the triangular trinuclear copper derivatives [Cu 3(μ3-OH)(μ-pz)3(RCOO)2(L) x] [R = CH3(CH2)3, L = H 2O, x = 1 for 5; R = CH3CH2CH(CH3), L = EtOH, x = 2 for 6; R = CH3(CH2)4, L = EtOH, x = 1 for 7; R = CH3(CH2)5, L = EtOH, x = 1 for 8] as it has been previously found for R = H, L = Hpz, x = 2, (1); R = CH3, L = Hpz, x = 1, (2); R = CH3CH2, L = EtOH, x = 1, (3) and [Cu3(μ3-OH)(μ-pz) 3-(CH3(CH2)2COO)2(MeOH) (H2O)], (4). The trinuclear structure common to 5-8 has been assigned on the basis of magnetic susceptibility studies, ESI MS, IR and UV/Vis spectroscopy as well as 1H NMR measurements. The room temp. magnetic susceptibilities of 5-8 almost correspond to the presence of a single unpaired electron for each trinuclear unit. The IR spectra exhibit signals due to the bridging μ3-OH in accordance with what was observed in the spectra of 1-4. Solid-state and MeOH solution UV/Vis spectra show the same features previously reported for 1-4 and 1H NMR spectra of 1-8 show almost identical low field signals that can be assigned to pz- hydrogens. A detailed investigation of the supramolecular structures of 1 and 4 and the single-crystal X-ray study of the polymeric paddlewheel Cu(2-methylbutyrate) 2, A, are also reported. Electrochemical experiments show that in 1-8 the CuII ions can be reduced, in distinct steps, to CuI and Cu0. All the complexes act as catalysts or catalyst precursors for the efficient peroxidative oxidation, by aqueous hydrogen peroxide in acetonitrile and at room temp., of cycloalkanes RH (cyclohexane and cyclopentane) to the corresponding cyclic alcohols and ketones, with overall yields of up to 34% and TONs up to 42. Radical pathways involving the formation of alkyl hydroperoxides (ROOH) are involved. Wiley-VCH Verlag GmbH & Co. KGaA, 2009.

Copper(II) carboxylates with 4-aminopyridine: Neutral mononuclear structures, isomerism of aceto compounds and a novel tetranuclear structure

Reactions of copper(II) carboxylates with 4-aminopyridine (4-apy) were investigated and their products structurally characterized by single crystal X-ray diffraction. Reaction of copper(II) acetate resulted in two isomers of a monomeric complex of composition Cu(ac)2(4-apy)2 with markedly different stabilities: the violet form, 1, unstable in air and the blue, stable form, 2. In both isomers the ligands are arranged around the copper atom in a trans geometry. The 4-apy ligands lie almost in the plane in 1, while they are twisted with respect to each other in 2. Variations were observed also in the coordination of the acetate groups to the copper ion. The energy difference between the two isomers was obtained on the basis of ab initio MO calculations. The result agrees well with the observed relative stabilities in the solid state. Monomeric complexes of the same stoichiometry were obtained also by the reaction of Cu(II) hexanoate and heptanoate with 4-apy. The violet Cu(hex)2(4-apy)2, 3, and Cu(hep)2(4-apy)2, 4, are isostructural and possess trans geometry of the ligands around the copper centre. Reaction of 4-apy with Cu(II) octanoate lead to formation of a novel, unprecedented basic centrosymmetric tetranuclear compound of composition Cu4(oct)6(OH)2(4-apy)2, 5. Complex 5 contains bidentate bridging and monoatomic bridging carboxylate groups, triply bridging hydroxyl groups and 4-aminopyridine as a terminal ligand. In all five compounds 4-apy is coordinated through the endocyclic nitrogen atom only.

Molar volume and apparent molar volume of copper(II) soap+methanol + benzene system at various temperatures

Studies on density of copper(II) soaps in mixture of benzene + methanol at various temperatures (40,45,50,55°C) have been made. The cmc values in higher volume percent of methanol are higher than those in higher volume percent of benzene. With regard to chain length of soaps cmc values follow the order C6>C8. Masson equation has been applied successfully to interpret apparent molar volume of copper soaps in benzene + methanol. The studies of temperature effect on various interactions suggest that interactions between soap-solvent molecules increase with the rise in temperature when non-polar hydrocarbon is predominant in the solvent mixture whereas soap-soap interactions increase with the rise in temperature when methanol is predominant at below and above cmc.