In:
Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 57, No. 12 ( 2002-12-1), p. 1375-1381
Abstract:
From a solution of Ni(CH 3 COO) 2 ∙ 4 H 2 O and acetylenedicarboxylic acid in deionized water single crystals of Ni(C 2 (COO) 2 )(H 2 O) 4 ∙ 2 H 2 O(P2 1 /a, Z = 2, isotypic to Co(C 2 (COO) 2 )(H 2 O) 4 ∙ 2 H 2 O) were obtained by slow evaporation of the solvent. In the solid state structure nickel is octahedrally surrounded by four water molecules and two oxygen atoms of the carboxylate anions. These octahedra are connected to chains by the dicarboxylates. Heating the hexahydrate to 100 °C in a stream of argon leads to Ni(C 2 (COO) 2 )(H 2 O) 2 (C2/c, Z = 4, isotypic to Mn[C 2 (COO) 2 ] ∙ 2 H 2 O). Here, the NiO 6 octahedron is built by two water molecules and four oxygen atoms of the dicarboxylate ligands, which connect the Ni octahedra to a three-dimensional network. Thermoanalytical investigations show another mass loss at about 200 °C, which leads to non-crystalline products. Finally, at about 400 °C NiO is formed. Measurements of the magnetic susceptibilities result in the expected behaviour for Ni 2+ in an octahedral co-ordination ( 3 A 2 ground state). The effective magnetic moment at room temperature is μ eff = 3.20 μ B .
Type of Medium:
Online Resource
ISSN:
1865-7117
,
0932-0776
DOI:
10.1515/znb-2002-1206
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2002
detail.hit.zdb_id:
2078109-X
detail.hit.zdb_id:
124635-5
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