The Preparation and Characterization of Two New Isomorphous Binuclear Heteropolytungstate Anions
The ammonium salts of [NiCoW 11 O 36 FH 2 ] 7- and [CuMnW 11 O 40 H 2 ] 8- have been isolated in the crystalline form. The cubic blue crystals of (NH 4 ) 6 NaNiCoW 11 O3gFH 2 10H 2 O crystalize in the cubic space group Pm3m with a = 11.170 Å. Other evidence from analytical results, FABMS, spectrosco...
Gespeichert in:
| Veröffentlicht in: | Synthesis and reactivity in inorganic and metal-organic chemistry 1993-06, Vol.23 (6), p.991-1010 |
|---|---|
| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| Zusammenfassung: | The ammonium salts of [NiCoW
11
O
36
FH
2
]
7-
and [CuMnW
11
O
40
H
2
]
8-
have been isolated in the crystalline form. The cubic blue crystals of (NH
4
)
6
NaNiCoW
11
O3gFH
2
10H
2
O crystalize in the cubic space group Pm3m with a = 11.170 Å. Other evidence from analytical results, FABMS, spectroscopy (Vis., I.R.), polarography, and X-ray powder patterns have shown that the above two anions are isomorphous. The structure of the anion is a modification of the well known "Keggin" structure. The first transition metal ion in the above formulas is thought to occupy the octahedral site; the second is thought to occupy the inner tetrahedral cavity. The two are bridged by an oxide or fluoride ion. |
|---|---|
| ISSN: | 0094-5714 1532-2440 |
| DOI: | 10.1080/15533179308016877 |