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Copper® chloride experimental procedure

Recently, Sarangi et al. (1995) discovered that the Barbier-type allylation of carbonyl compounds could be mediated by zero-valent copper. In the experimental procedure copper(ll) chloride in its hydrated form was mixed with magnesium powder. This reaction did not proceed with anhydrous CuCU, but addition of water to this anhydrous salt in the presence of magnesium allowed the allylation of aldehydes and ketones with allylic bromides. In the absence of halides, the hydrated reagent (CuCl2 2H20/Mg) turned out to be efficient in the reduction of aldehydes. However, the water of crystallization could not suffice and addition of water promoted the reduction process (Sarangi eta/., 1995). [Pg.115]

C. The materials chosen for the cross-section measurements are cobalt, sodium chloride, cadmium carbonate, and copper. Each Lucite sample contains a known amount of material. The experimental procedure for measuring the worths of the samples is identical with that of the boron standard. The reactor period with the samples on the core center line are... [Pg.213]

The reaction of tert-alkyl Grignard reagents with carboxylic acid chlorides in the presence of a copper catalyst provides ieri-alkyl ketones in substantially lower yields than those reported here.4,14 The simplicity and mildness of experimental conditions and isolation procedure, the diversity of substrate structural type, and the functional group selectivity of these mixed organocuprate reagents render them very useful for conversion of carboxylic acid chlorides to the corresponding secondary and tertiary alkyl ketones.15... [Pg.126]

Carbon Monoxide. The facilitated transport of carbon monoxide by cuprous chloride in aqueous solution was first studied by Steigelroan and Hughes (j 8) and more recently by Smith and Quinn (J 9). Smith and Quinn found the cuprous ion to be very effective c2U"rier for carbon monoxide and increased the flux by two orders of magnitude over the purely diffusive case. The facilitation factor was measured as a function of carbon monoxide partial pressure, total copper concentration, and membrane thickness. Recently, Koval et al. (20) reported facilitated CO transport using a ferrous complex derived from the tetraimine macrocyclic ligand 2,3,9,10-tetramethyl-1,3,8,11-tetraazacyclo-tetradeca-1,3,8,10- tetraene(TIM) in benzoni-trile. They measured the kinetic and dlffusional constants and showed selectivity for CO over a variety of other gases. The experimental and mathematical procedures which they described can be used for any simple complexatlon reaction. [Pg.112]


See other pages where Copper® chloride experimental procedure is mentioned: [Pg.805]    [Pg.741]    [Pg.31]    [Pg.106]    [Pg.423]    [Pg.112]    [Pg.179]   
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Copper chloride

Experimental procedures

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