Abstract
Two new neutral, binuclear Cu IICu II bis(oxamato) complexes with the formula [Cu 2(opba)(pmdta)(MeOH)] · 1/2MeOH · dmf ( 3) and [Cu 2(nabo)(pmdta)(MeOH)] ( 4), with opba = o-phenylene-bis(oxamato), nabo = 2,3-naphthalene-bis(oxamato), pmdta = N, N, N′, N″, N″-pentamethyldiethylenetriamine and dmf = dimethylformamide have been synthesized and their crystal structures have been determined. The structure of 3 consists of dimeric [Cu 2(opba)(pmdta)(MeOH)] entities, joined together by mutual intermolecular Cu⋯O contacts of the Cu 2+ ion of one [Cu(opba)] 2− complex fragment and one carboxylate atom of the oxamato group of a second [Cu(opba)] 2− complex fragment. The structure of 4 consists of neutral binuclear complexes joined together by hydrogen bonds and π–π interactions, giving rise to an unique supramolecular 1D-chain. The magnetic properties of 3 and 4 were studied by susceptibility measurements versus temperature. For the intramolecular J parameter, identical values of (−114 ± 2) cm −1 ( 3) and (−112 ± 2) cm −1 ( 4) were obtained.
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