Novel Manganese(II) Sulfonate−Phosphonates with Dinuclear, Tetranuclear, and Hexanuclear Clusters

Hydrothermal reactions of manganese(II) salts with m-sulfophenylphosphonic acid (m-HO3S−Ph−PO3H2, H3L) and 1,10-phenanthroline (phen) led to six novel manganese(II) sulfonate−phosphonates, namely, [Mn2(HL)2(phen)4][Mn2(HL)2(phen)4(H2O)]2·6H2O (1), [Mn4(L)2(phen)8(H2O)2][ClO4]2·3H2O (2), [Mn(phen)(H2O)4]2[Mn4(L)4(phen)4]·10H2O (3), [Mn6(L)4(phen)8(H2O)2]·4H2O (4), [Mn6(L)4(phen)8(H2O)2]·24H2O (5), and [Mn6(L)4(phen)6(H2O)4]·5H2O (6). The structure of 1 contains two types of dinuclear manganese(II) clusters, and 2−3 exhibit two types of tetranuclear manganese(II) cluster units. 4−5 feature two different types of isolated hexanuclear manganese(II) clusters, whereas the hexanuclear manganese(II) clusters in 6 are bridged by sulfonate−phosphonate ligands into a 1D chain. Magnetic property measurements indicate that there exist weak antiferromagnetic interactions between magnetic centers in all six compounds.