Crystal structure and magnetic properties of an octacyanometalate-based three-dimensional tungstate(V)-manganese(II) bimetallic assembly

Citation
Zj. Zhong et al., Crystal structure and magnetic properties of an octacyanometalate-based three-dimensional tungstate(V)-manganese(II) bimetallic assembly, INORG CHEM, 39(22), 2000, pp. 5095-5101
Citations number
26
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
INORGANIC CHEMISTRY
ISSN journal
00201669 → ACNP
Volume
39
Issue
22
Year of publication
2000
Pages
5095 - 5101
Database
ISI
SICI code
0020-1669(20001030)39:22<5095:CSAMPO>2.0.ZU;2-A
Abstract
A single crystal of the title compound [Mn-6(II)(H2O)(9){W-V(CN)(8)}4 . 13H (2)O](n) was synthesized in a hot aqueous solution containing octacyanotung state, Na-3[W(CN)(8)]. 3H(2)O, and Mn(ClO4)(2). 6H(2)O. The compound crysta llized in the monoclinic system, space group P2(1)/c with cell constants a 15.438(2) Angstrom, b= 14.691(2) Angstrom, c = 33.046(2) Angstrom, beta = 9 4.832(9)degrees, and Z = 4. The crystal consists of a W-V-CN-Mn-II linked t hree-dimensional network [{Mn-II-(H2O)}(3){Mn-II(H2O)(2)}(3){W-V(CN)(8)}(4) ](n) and H2O molecules as crystal solvates. There are two kinds of W sites: one is close to a dodecahedron geometry with six bridging and two terminal CN ligands; the other is close to a bicapped trigonal prism with seven bri dging and one terminal CN Iigands. The field-cooled magnetization measureme nt showed that the compound exhibits a spontaneous magnetization below T-c = 54 K. Further magnetization measurements on the field dependence reveal i t to be a ferrimagnet where all of the Mn (II) ions are antiparallel to all the W-V ions.