Autori: Liliana Stoicescu, Aurélie Jeanson, Carine Duhayon, Ana Tesouro-Vallina, Athanassios K. Boudalis, Jean-Pierre Costes, Jean-Pierre Tuchagues

Editorial: Inorganic Chemistry, 46 (17), p.6902-6910, 2007.

Rezumat:

Doubly bridged -alkoxo–X (X = pyrazolato or acetato) dinuclear MnIII complexes of 2-hydroxy-N-{2-hydroxy-3-[(2-hydroxybenzoyl)amino]propyl}benzamide) (H5L1) and 2-hydroxy-N-{2-hydroxy-4-[(2-hydroxybenzoyl)amino]butyl}benzamide (H5L2), [Mn2(L)(pz)(MeOH)4]·xMeOH (1, L = L1, x = 0.5; 2, L = L2, x = 0; Hpz = pyrazole) and [Mn2(L1)(OAc)(MeOH)4] (3), have been prepared, and their structure and magnetic properties have been studied. The X-ray diffraction analysis of 1 (C24.5H34Mn2N4O9.5, triclinic, P, a = 12.2050(7) A, b = 12.7360(8) A, c = 19.2780(10) A, = 99.735(5), = 96.003(4), = 101.221(5), V = 2867.6(3) A3, Z = 4), 2 (C25H34Mn2N4O9, triclinic, P, a = 9.4560(5) A, b = 11.0112(5) A, c = 13.8831(6) A, = 90.821(4), = 92.597(4), = 93.403(4), V = 1441.29(12) A3, Z = 2), and 3 (C23H32Mn2N2O11, triclinic, P, a = 10.511(5) A, b = 11.713(5) A, c = 13.135(5) A, = 64.401(5), = 74.000(5), = 66.774(5), V = 1329.3(10) A3, Z = 2) revealed that all complexes consist of dinuclear units which are further extended into 1D (1 and 3) and 2D (2) supramolecular networks via hydrogen-bonding interactions. Magnetic susceptibility data evidence antiferromagnetic interactions for all three complexes: J = -3.6 cm-1, D~0 cm-1, g = 1.93 (1); J = -2.7 cm-1, D = 0.8 cm-1, g = 1.93 (2); J = -4.9 cm-1, D = 3.8 cm-1, g = 1.95 (3).

Cuvinte cheie: complecsi ai manganului(III), bis(2-hidroxibenzamide), proprietati magnetice // manganese(III) complexes, bis(2-hydroxybenzamide), magnetic properties

URL: http://pubs.acs.org/cgi-bin/abstract.cgi/inocaj/2007/46/i17/abs/ic062398r.html