Two new neutral, binuclear (CuCuII)-Cu-II bis(oxamato) complexes with the formula [Cu-2(opba)(pmdta)(MeOH)] center dot 1/2MeOH center dot 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 center dot center dot center dot O contacts of the Cu2+ 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 pi-pi 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.
Synthesis, characterization, and magnetic properties of new binuclear (CuCuII)-Cu-II bis(oxamato) complexes / T. Ruffer; B. Brauer; F. E. Meva; L. Sorace. - In: INORGANICA CHIMICA ACTA. - ISSN 0020-1693. - STAMPA. - 362:(2009), pp. 563-569. [10.1016/j.ica.2008.05.005]
Synthesis, characterization, and magnetic properties of new binuclear (CuCuII)-Cu-II bis(oxamato) complexes
SORACE, LORENZO
2009
Abstract
Two new neutral, binuclear (CuCuII)-Cu-II bis(oxamato) complexes with the formula [Cu-2(opba)(pmdta)(MeOH)] center dot 1/2MeOH center dot 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 center dot center dot center dot O contacts of the Cu2+ 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 pi-pi 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.File | Dimensione | Formato | |
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