Organocopper compounds thermal stability

Thermal stabilization of methylcopper by small quantities of magnesium halides has been reported by Costa et al. 82). The stability of ethylcopper is also very dependent on the nature of the magnesium halide present, the iodide having the greatest effect 104). Recent studies indicate that organocopper compounds, RCu, containing metal halides may be cuprates of the type M(RCuX) 190, 191, 257). The presence of... 

The cuprate complexes have better thermal stability and solubility than the parent organocopper compounds. They can be prepared directly in high yields from the 2 1 reaction of RLi with CuBr [Eqs. (c) -1- (d)] or quantitatively via the 1 1 reaction of... 

Several methods have been applied to prepare copper(I) thiolates in a pure form. As a result of the high thermal stability of such complexes, a copper(I) thiolate can generally be prepared in a number of ways, which is in contrast to the preparation of organocopper species where, due to to their low thermal stability, specific protocols are often necessary to successfully isolate the target compound (43). 

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