ISSN:
0044-2313
Keywords:
Copper niobium pyrazine complexes
;
syntheses
;
crystal structures
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Synthesen und Strukturen von zwei neuen Kupfer-Niob-Pyrazin-Komplexen: Dreidimensionales CuNb(pyz)2OF5 · (pyz)(H2O) und zweidimensionales [Cu(pyz)2,5]+ [NbF6]- · (pyz)Kristalle von CuNb(pyz)2OF5 · (pyz)(H2O) (1) und [Cu(pyz)2,5]+ [NbF6]- · (pyz) (2) wurden aus CuO, 1/2(Nb2O5), (HF)x · Pyridin und H2O in einem Überschuß von Pyrazin gezüchtet (150°C und autogener Druck). Die hellblauen Kristalle von (1) sind orthorhombisch, Raumgruppe Cccm (Nr. 66), with a = 14,547(1) Å, b = 16,135(2) Å, c = 13,803(2) Å, und Z = 8. Die Struktur von (1) besteht aus eckenverknüpften [Cu(pyz)4/2F2/2]+-, [Cu(pyz)4/2O2/2]- und [NbF4O1/2F1/2]-0,5-Octaedern. Die orangen Kristalle von (2) sind monoklin, Raumgruppe C2/c (Nr. 15), a = 11,792(8) Å, b = 17,123(3) Å, c = 17,051(5) Å, β = 90,04(4)°, Z = 8. Die Struktur von (2) besteht aus gefalteten Ringen von eckenverknüpften [Cu(pyz)(pyz)3/2]+-Tetraedern und isolierten [NbF6]--Anionen in den Ringen.
Notes:
Crystals of CuNb(pyz)2OF5 · (pyz)(H2O) (1) and [Cu(pyz)2.5]+ [NbF6]- · (pyz) (2) were grown (150°C and autogeneous pressures) from CuO, 1/2(Nb2O5), (HF)x · pyridine, and H2O in excess pyrazine. Light blue single crystals of (1) are orthorhombic, crystallizing in space group Cccm (No. 66), with a = 14.547(1) Å, b = 16.135(2) Å, c = 13.803(2) Å, and Z = 8. The structure of (1) contains corner shared [Cu(pyz)4/2F2/2]+, [Cu(pyz)4/2O2/2], and [NbF4O1/2F1/2]-0.5 octahedra. Orange crystals of (2) are monoclinic, crystallizing in space group C2/c (No. 15), with a = 11.792(8) Å, b = 17.123(3) Å, c = 17.051(5) Å, β = 90.04(4)°, and Z = 8. The structure of (2) contains puckered rings of corner shared [Cu(pyz)(pyz)3/2]+ tetrahedra and isolated [NbF6]- anions within the rings.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19966220316
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