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Tomoyuki Higami Masato Hashimoto Seichi Okeya 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(10):i144-i146
Polyoxometallates are capable of including transition metals in their crystal structures as either discrete cations or heteroatoms. The title compound crystallizes with triclinic symmetry and consists of a centrosymmetric [V10O28]6? anion, a trimeric {[Na(H2O)3][Ni(H2O)6][Na(H2O)3]}4+ cation, an [Ni(H2O)6]2+ cation and four water molecules of crystallization. The compound possesses two Ni atoms (each on independent inversion centres), one as a discrete cation and one in a disodium–nickel trimeric cation involved in the one‐dimensional polycation–polyanion hybrid polymer. The polymers are bound together via hydrogen bonds to the water molecules and the nickel(II) hexahydrate cation. Several structures of decavanadate compounds having transition metal atoms, monovalent cations and [V10O28]6? anions in the ratio 2:2:1 have been reported previously. However, the present compound differs from these in its arrangement of monovalent cations and transition metal atoms. 相似文献
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Summary The synthesis, properties and X-ray crystal structure of [Ni(Me3[12]N3)(O2N)(H2O)](ClO4)·2H2O, in which Me3[12]N3 is 2,4,4-trimethyl-1,5,9-triazacyclododec-1-ene, are described. The Ni atom is octahedrally coordinated to three N atoms of the macrocycle, two O atoms of the nitrito group and one H2O molecule. Monomeric units are linked by hydrogen bonds through one of the water of crystallization molecules, forming a chain. Magnetic measurements between 290 and 4 K reveal slight antiferromagnetic behaviour. 相似文献
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