Abstract
AbstractIt is deduced from absorption spectra and susceptibilities of acetonitrile solutions containing CuII and bromide, that the lower complexes CuBr+ and CuBr2 are unstable with respect to CuI, elementary bromine and CuBr3−. The complex CuBr3− has a low tendency to add another bromide to form CuBr42−. A number of spectral data show that quite generally in organic solvents such as acetonitrile, ethyl acetate, acetic acid, nitromethane and dimethylformamide the trihalogeno‐complex CuX3− can exist in the presence of CuX+, whereas CuX2 is unstable with respect to the mono‐ and the tri‐complex.
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