Copper I Chloride Complexes Preparation and Handling

LABILE COPPER(I) CHLORIDE COMPLEXES PREPARATION AND HANDLING 

In the preparative method described, the precursor complex is formed in situ, using the precursor ligand as solvent, which minimizes ligand dissociation. The [CuCl(EYK)] precursor solution in EVK (designated as [CuC1(EVK)]EVk) is highly reactive but stable at — 25°C under inert 

Carbonylchlorocopper(I) (A) is a valuable precursor for the synthesis of organometallic and coordination compounds of copper(I). Previous methods11 utilizing water, tetrahydrofuran, methanol, or benzene as solvent may yield lower-purity products because copper(I) chloride is not soluble in these solvents without excess halide ligand. The synthetic method described here also provides a convenient way of growing large crystals of X-ray quality of carbonylchlorocopper(I). 

Dichloro[cate a-2-methyl-l,4-butadiene]dicopper(I) (B) can be prepared from direct reaction between isoprene and copper(I) chloride, analogously to the synthesis of the complex between butadiene and CuCl.12 The advantage of the synthesis described here is that the product is not contaminated with unreacted CuCl, and can be obtained as high-quality crystals instead of a microcrystalline powder. 

This technique for handling labile complexes depends on retarding decomposition rates to a minimum by keeping the compounds close to a liquid 

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Labile Copper(I) Chloride Complexes Preparation and Handling 223... 

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