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2005
Vanadium
I 5000
24- 029
Cyclic Polyvanadates Incorporating Template Transition Metal Cationic Species:
Synthesis and Structures of Hexavanadate [PdV6O18 ]4-, Octavanadate
[Cu2V8O24]4-, and Decavanadate [Ni4V10O30(OH)2(H2O) 6]4-. — The structures of (III)
(orthorhombic, space group Pca21, Z = 4), (VI) (monoclinic, P21/n, Z = 4), and (VIII)
(triclinic, P1, Z = 1) are determined by single crystal XRD. The results demonstrate that
the M2+ (M: Pd, Cu, Ni) ions induce [VO3 ]nn - (n = 6, 8, 10) ring formation. The cyclic
vanadate is composed of corner-sharing VO4 tetrahedra and incorporates the metal
cations in the center. In the case of complex (VIII), the di-µ-hydroxo-bridged Ni2+
dimer with capped Ni2+ aqua ions is formed by hydrolysis to form the decavanadate
ring, in which two of the tetrahedral vanadate units are not directly bound to the Ni core.
— (KURATA, T.; UEHARA, A.; HAYASHI*, Y.; ISOBE, K.; Inorg. Chem. 44 (2005)
7, 2524-2530; Dep. Chem., Fac. Sci., Kanazawa Univ., Ishikawa, Kanazawa 920,
Japan; Eng.) — Schramke
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