Doubly bridged mu-alkoxo-mu-X (X = pyrazolato or acetato) dinuclear Mn-III 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), [Mn-2(L)(pz)(MeOH)(4)]center dot xMeOH (1, L = L-1, x = 0.5; 2, L = L-2, x = 0; Hpz = pyrazole) and [Mn-2(L-1)(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-1, a = 12.2050(7) angstrom, b = 12.7360(8) angstrom, c = 19.2780(10) angstrom, alpha = 99.735(5)degrees, beta = 96.003(4)degrees, gamma = 101.221(5)degrees, V = 2867.6(3) angstrom(3), Z = 4), 2 (C25H34Mn2N4O9, triclinic, P1, a = 9.4560(5) angstrom, b = 11.0112(5) angstrom, c = 13.8831(6) angstrom, alpha = 90.821(4)degrees, beta = 92.597(4)degrees, gamma = 93.403(4)degrees, V = 1441.29(12) angstrom(3), Z = 2), and 3 (C23H32Mn2N2O11, triclinic, P1, a = 10.511(5) angstrom, b = 11.713(5) angstrom, c = 13.135(5) angstrom, alpha = 64.401(5)degrees, beta = 74.000(5)degrees, gamma = 66.774(5)degrees, V = 1329.3(10) angstrom(3), 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 approximate to 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).