title: Syntheses and crystal structures of novel manganese(II) or cadmium(II) arsonates with dinuclear clusters or 1D arrays.
abstract: Hydrothermal reactions of cadmium(II) or manganese(II) salts with aryl arsenic acids RAsO(3)H(2) (R = C(6)H(5)-, H(2)L(1); 3-NO(2)-4-OH-C(6)H(3)-, H(3)L(2)) and 1,10-phenanthroline (phen) led to six new cadmium(II) and manganese(II) organo arsonates, namely, Cd(phen)(HL(1))(2)(H(2)O) (1), M(phen)(H(2)L(2))(2) (M = Mn, 2; Cd, 3), [M(phen)(2)(H(2)L(2))](ClO(4)) x (H(2)O) (M = Mn, 4; Cd, 5), and [Mn(phen)(2)(HL(1))](ClO(4)) x (H(2)O) (6). The structures of 1, 4, and 5 contain two types of dinuclear clusters, whereas 2 and 3 exhibit 1D chains based on dinuclear M(2)(mu-O)(2) cluster units further bridged by arsonate ligands. Compound 6 features a 1D helical chain in which neighboring two metal centers are bridged by one arsonate ligand. Magnetic property measurements on compounds 2, 4, and 6 indicate that there exist very weak antiferromagnetic interactions between magnetic centers in all three compounds. Compounds 1-6 display typical ligand-centered fluorescence emission bands.
authors.affiliation: State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, PR China.
authors.forename: Fei-Yan
authors.initials: FY
authors.lastname: Yi
authors.forename: Na
authors.initials: N
authors.lastname: Zhao
authors.forename: Wei
authors.initials: W
authors.lastname: Wu
authors.forename: Jiang-Gao
authors.initials: JG
authors.lastname: Mao