Cobalt octanoate

PPh3)3] or cobalt octanoate-PPhs-EtsAl as catalysts. With the former Ziegler-type catalyst containing chiral (including monoterpenoid) phosphines or diphosphines, up to 33% enantiomeric excess of 3i - or 3S-citronellal can be obtained, enantioselectivity being both ligand- and temperature-dependent, and at the expense of isolated yields. ... 

OTHER INGREDIENTS Inhibitors to prevent premature cross-linking and to allow a suitable shelf life (e.g., hydroquinone). Initiators (catalysts) methyl ethyl ketone peroxides, benzoyl peroxides, etc. Accelerators cobalt naphthenate, cobalt octanoate, etc. 

The kinetic model developed in [83] describes the dependence of the conversion on time and MW for butadiene polymerisation on homogeneous catalysts. Compounds with Co, Al, and H2O are assumed to participate in the formation of AC. Computational and experimental data for the conversion of butadiene are proved to correlate well with each other when polymerisation is carried out with the cobalt octanoate -diethylaluminium chloride - water catalytic system. However, this model considers only one type of active centre and does not provide an explanation for the increase of polybutadiene polymerisation with conversion growth. The polymerisation diagram and mathematical model with two types of AC have been proposed for butadiene polymerisation in the presence of a Li(H-C4H9) - diethylene glycol dimethyl ether catalytic system [84], This approach is suitable for the calculation of changes... 

The autoxidation reactions are promoted by catalysts which are organic salts of polyvalent heavy metals. By far the most powerful of these are cobalt salts, e.g. cobalt octanoate (2-ethylhexanoate, C4H9CH(C2H5)C00H) or cobalt naphthenate, and these are usually accompanied by other organic salts, e.g. of lead, zirconium or calcium. 

Clavularia viridis, 1 Clofibrate, 540 Clonal senscence, 539 Clostridium butyricum, 501 Clostridium perfringens, 509 Clover-leaf lipids, 163 Clupanodon melanostica, 133 Clupeiformes, wax esters, 147 Cobalt octanoate, 246 Cockroaches, 145... 

Supported Ziegler catalysts are also used [154-156]. High cis contents up to 98% can be obtained with cobalt salts [cobalt octanoate, cobalt naphthenate, tris(2,4-penta-dionato) cobalt] in combination with alumoxanes which are synthesized in situ by hydrolysis of chlorodiethylaluminum or ethylaluminum sesquichloride. Only 0.005 to 0.02 mmol of cobalt salt is needed for the polymerization of 1 mol of 1,3-butadiene [157-159]. At 5 °C the molecular weight varies from 350 000 to 750 000 depending on the alkylaluminum chloride, while at 75 °C the variation is between 20 000 and 200,000. The polymerization rates are fast over a considerable range of chloride content. The 1,4-structure increases with chloride content. The molecular weight increases with the chloride level [160]. 

In the extraction systems with octanoic acid, Gindin et al. (38) revealed that the formation of dimeric cobalt(II) and nickel(II) oc-tanoates tended to decrease with increasing dielectric constant of the organic solvent decane > benzene > a-chloronaphthalene > chloroform > nitrobenzene > 3-methyl-l-butanol. Because 3-methyl-l-butanol is a solvating solvent, no dimerization of Co(II) and Ni(II) octanoates was observed in this solvent. 

Fresh cobalt is introduced into the Shell process in the form of carboxylate, e.g., octanoate. In the presence of phosphine (PR3) and carbon monoxide, a complex is formed to which the formal structure [Co(CO)3PR3]2 is ascribed [189]. Under carbon monoxide pressure this neutral complex is converted into an ionic complex [Co(CO)3(PR3)2]+[Co(CO)4], which can be precipitated (e.g., by addition of methanol) and separated by filtration [190]. In the case of the combined hydrofor-mylation/aldolization the precipitation may be achieved by slight acidification under carbon monoxide pressure (make-up section 7 in Figure 12) [185]. 

Hexanoic acid 1-Hexanok acid n-Hexanoic acid. See Caproic acid Hexanoic acid, 2-ethyl-, cobalt (2+) salt See Cobalt octoate Hexanoic acid, 2-ethyl-, hexadecyl ester. See Cetyl octanoate Hexanoic acid, 2-ethyl-, zinc salt See Zinc 2-ethylhexanoate Hexanol 1-Hexanol Hexan-1-ol n-Hexanol. See Hexyl alcohol 6-Hexanolactone. Seee-Caprolactone monomer 1-Hexanol, 2-ethyl. See2-Ethylhexanol 1-Hexanol, 2-etl l-, acrylate. See Octyl aciylate 1-Hexanol, 2-etl -, phosphate. SeeTrioclyl phosphate 1-Hexanol, 2-etl -, sebacate. See Dioctyl sebacate... 

See Cetearyl octanoate Hexanoic acid, 2-ethyi-, cobalt (2+) salt. See Cobalt octoate... 

Urteaga, L., N. Sanchez, M. Martinez J. Aracil (1994) Kinetic study of the synthesis of n octyl octanoate using cobalt chloride as catalyst. Chemical engineering technology, 17,210-215, ISSN 1521 125. 

Hiatt, Irwin and Gould [328] studied the decomposition of terU mXyX hydroperoxide in the presence of cobaltous and cobaltic stearates (St), octanoates (Oct) and acetylacetonates as well as iron phthalocyanine. They found that the acetylacetonates of Ni(II), Co(III) and Fe(III) were inert toward terUh xiyX hydroperoxide at room temperature. In chlorobenzene or alkanes at 25-45 °C, half lives for decomposition of O.IM ferf-butyl hydroperoxide by 10 M catalyst ranged from 1-10 min with the active catalysts. Products included approximately 88% tert-huXyX alcohol, 11% di-rer -butyl peroxide, 1% acetone and 93% O2. These authors reported that in general, the choice of metal ion, as long as it can undergo a facile one-electron redox reaction, had little effect on products or reaction rates [328]. 

Primary alkyl hydroperoxides are decomposed in the presence of many metal salts to give mainly alcohols, aldehydes and in some cases carboxylic acids [326]. Cobalt(II) octanoate catalyzes the decomposition of w-butyl hydroperoxide in pentane at 38 °C to give -butyl alcohol (67%), oxygen (70%) and w-butyraldehyde (32%) [328], equation (215). 

Several catalytic systems based on nickel give high cis content PBDs with activities and stereoselectivities similar to those observed for cobalt compounds." One such catalytic system is either a soluble nickel salt (Ni(acac)2 or Ni(octanoate)2) plus an alkylaluminum chloride,... 

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