Abstract:
The magnetic susceptibility as a function of temperature between 4.2 and 300 K has been determined for the new tetrameric complex [(CuCI(S,CNEt,)),]. On the basis of the known X-ray crystal structure, it i s shown that the susceptibility can be interpreted in terms of three isotropic-exchange interactions acting between each of the four copper(ii) ions. I t i s established that the principal effect of the interdimer exchange interaction i s to lift the de- generacy of the two triplet-spin levels which characterise a pair of non-interacting dimers.
