Co chloride

The donor properties of N3P3CI6 appear to be too weak to allow complex formation with metal halides, but it has been reported that complex formation between N3P3Cl5 NHBu" and Cu" or Co" chlorides in acetonitrile solutions can be detected by u.v. spectroscopy. Attempts to isolate the complexes were unsuccessful. 

DeMent (Ref) proposed to use the following Co ion contg mixts as smoke-producing pyrotechnic compns a)Co stearate 2.0, K chlorate 10.0 to 12.0 Amm acid fluoride 4.0 to 8.0 parts. This compn, when ignited by a flame, produced a heavy, voluminous fine white smoke b)When using monochloroacetic acid in previous mixt, instead of fluoride, the color of smoke produced was blue-white c)Equal parts of Co chloride, K bromate, K bromide, sulfur, K chlorate K acid sulfate burned with the emission of a green to green-brown smoke d)Equal parts of Co nitrate, K bromate, K bromide, sulfur, K chlorate K acid sulfate burned with the emission of grn to gm-bm smoke e)A mixt of Co chloride 1.0, K chlorate 2.0,K iodate 1.0, K iodide 1.0 sulfur 1.5 parts burned with evolution of a heavy voluminous deep violet smoke Ref J.DeMent, USP 2995526 (1961), p8... 

The use of NaBH4 as the hydride source appears to have been employed only with Co chloride. Mono- and di-substituted alkenes readily undergo reduction, with dr-alkenes undergoing reduction faster than rranr-alkenes. Trisubstituted alkenes react extremely slowly, while tetrasubstituted alkenes apparently do not undergo reduction. 

Reactions.—New systems for the reduction of alkyl halides to alkanes include mixtures of lithium aluminium hydride with transition-metal chlorides (such as Ni or Co" chlorides) and some complex metal hydrides of copper, especially the THF-soluble Li4CuHs. Details of the application of sodium cyanoborohydride to the reduction of halides (and sulphonate esters) in dipolar aprotic solvents have been published. Virtually all other functional groups are inert to this convenient, mild, and efficient system, which has been used to develop a one-pot deoxygenation of primary alcohols (Scheme 39) via the iodides. The alternative cyanoborohydride reagents (55) and the polymeric (56) are also discussed. ... 

An interesting study of chloride exchange in Co — chloride complexes in a non-aqueous medium, nitromethane, has been made by Gentz-... 

Chen et al. [16] achieved complete mineralization of trichloroethylene at an Ebonex anode, the chief products being CO2 (and about 10 % CO), chloride, and chlorate. The authors determined the fractions of the anodic current carried out to form O2, carbon oxides, and CIOs and observed the expected relationship that the current efficiency for TCE oxidation decreased at the expense of that for O2 with increasing anode potential. Spin trapping experiments were... 

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