Heterobinuclear Complexes as Tectons in Designing Coordination Polymers

Four new 1D coordination polymers have been constructed from [LCuIIMII] nodes connected by various spacers—the dianion of pyrazole-3,5-dicarboxylic acid (pzdc2−), the trianion of trimesic acid (trim3−), the tetracyanonickelate(II) anion ([Ni(CN)4]2−), and the dicyanamide anion (dca−) [MII = MnII, CoII, and L2− is the dianion of the Schiff-base resulting from the 2:1 condensation of 3-methoxysalicylaldehyde with 1,3-propanediamine, L2− = N,N′-propylene-bis-(3-methoxysalycilideneiminato)]: [LCuMn(pzdc)(CH3OH)(H2O)]·H2O (1), [LCuMn(trim)2/3(CH3OH)2/3(H2O)1/3]·0.66(H2O)·0.66(CH3OH) (2), [LCuCo(dca)2] (3), and [LCu(CH3OH)(H2O)Mn(NC)2Ni(CN)2]·(H2O)(CH3CN) (4). The fifth compound, [{CuL}K{LCu}{Ag(CN)2}] (5), was obtained by reacting [CuL] with K[Ag(CN)2]. The magnetic investigation of compounds 1, 2, and 4 reveals antiferromagnetic CuII−MnII intranode interactions (1, J = −48.9 cm−1; 2, J = −64.7 cm−1; and 4, J = −60.4 cm−1; H = −JSMnSCu), as well as weak internodes antiferromagnetic interactions (for compounds ...