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Titolo:
THE ANIONS [(ZROH(CO)(3))(3)](6-) AND [(ZROH(C2O4)(3))(2)](6-) - SINGLE-CRYSTAL X-RAY-DIFFRACTION STUDIES OF THE COMPLEXES GUANIDINIUM ZIRCONIUM CARBONATE [(C(NH2)(3))(3)ZROH(CO3)(3)CENTER-DOT-H2O](2) AND SODIUM ZIRCONIUM OXALATE NA-6(ZROH(C2O4)(3))(2)CENTER-DOT-7H(2)O
Autore:
MORRIS S; ALMOND MJ; CARDIN CJ; DREW MGB; RICE DA; ZUBAVICHUS Y;
Indirizzi:
UNIV READING,DEPT CHEM,POB 224 READING RG6 6AD BERKS ENGLAND UNIV READING,DEPT CHEM READING RG6 6AD BERKS ENGLAND
Titolo Testata:
Polyhedron
fascicolo: 13-14, volume: 17, anno: 1998,
pagine: 2301 - 2307
SICI:
0277-5387(1998)17:13-14<2301:TA[A[->2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
THERMAL-DECOMPOSITION KINETICS;
Keywords:
ANIONS; SINGLE CRYSTAL X-RAY DIFFRACTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
27
Recensione:
Indirizzi per estratti:
Citazione:
S. Morris et al., "THE ANIONS [(ZROH(CO)(3))(3)](6-) AND [(ZROH(C2O4)(3))(2)](6-) - SINGLE-CRYSTAL X-RAY-DIFFRACTION STUDIES OF THE COMPLEXES GUANIDINIUM ZIRCONIUM CARBONATE [(C(NH2)(3))(3)ZROH(CO3)(3)CENTER-DOT-H2O](2) AND SODIUM ZIRCONIUM OXALATE NA-6(ZROH(C2O4)(3))(2)CENTER-DOT-7H(2)O", Polyhedron, 17(13-14), 1998, pp. 2301-2307

Abstract

The complex [(C(NH2)(3))(3)ZrOH(CO3)(3). H2O](2) (A) has been shown by-means of a single crystal X-ray diffraction study to contain [C(NH2)(3)](+) cations and dimeric anions of formulation [(ZrOH(CO3)(3))(2)](6-). The anion is centrosymmetric with each metal being bonded to two bridging OH groups and three chelating CO32- ions.The Zr atoms are thus eight coordinate with a dodecahedral environment. The Zr-O distancesformed by the bridging OH groups are shorter than those formed through zirconium carbonate interactions. The non-bonded Zr Zr distance is 3.47(2) Angstrom. An infrared spectroscopic investigation of A providesdata which support the findings of the crystallographic study. Likewise the complex Na-6(ZrOH(C2O4)(3))(2). 7H(2)O (B) contains the anion [(ZrOH(C2O4)(3))(2)](6-). This anion is structurally related to the anion in A as each Zr atom has an eight-coordinate dodecahedral environment being bonded to two bridging OH groups and three chelating oxalate ligands, but has no imposed crystallographic symmetry. The Zr Zr non-bonded distance is 3.50(1) Angstrom. The O-Zr-O bridge angles are 69.7(4)degrees in A and 67.4(3)degrees in B. (C) 1998 Elsevier Science Ltd. All sights reserved.

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Documento generato il 29/11/20 alle ore 02:03:00