Organocopper compounds determination

Since isolable organocopper) 11) compounds do not apparently exist, it is rather surprising that oxidation of the cuprate CdI+[(CF3)2Cu ] (prepared in situ) with thiuram disulfide affords (CF3)2Cu "S2CNEt2 (see Eqn. 1 in Scheme 1.6), the first and so far only example of an organocopper compound with the copper atom in the trivalent oxidation state. The structure of this compound was unambiguously proven by an X-ray crystal structure determination (see Fig. 1.2) [37]. 

Little attention has been paid to the elucidation of the structures of organocopper compounds until recently. The structures of some copper compounds have been determined either by X-ray crystallography or by a combination of NMR and mass spectroscopic data, and the degree of association. Aggregation states have been determined mostly by cry-oscopy, but occasionally by vapor pressure osmometry and ebulliometry where permitted by the stability of the organocopper compound 36, 37, 281f). 

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