Exchange interactions in bis(L-leucinato)copper(II)

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Abstract
In order to evaluate the exchange interaction parameters for interaction between copper ions, the authors measured the angular variation in the gyromagnetic factor and the linewidth of the single electron paramagnetic resonance line of bis(L-leucinato)Cu(II) single crystals, at 9.7 and 33.6 GHz, and 300 K. They obtain mod J mod =0.17 K and mod J' mod =0.23 K for the root mean square values of the exchange interaction of one copper with its six nearest copper neighbours and with its four nonequivalent copper neighbours, respectively. These results are analysed in terms of the chemical pathways for superexchange and compared with those obtained in other similar systems.