The antimony(iii)-bridged heteropolyanion sandwich dimers [SbIII3(A--XW9O34)2]11 (X = SiIV, GeIV) and C-shaped double-sandwich [SbIII6O2(PW6O26)(A--PW9O34)2]15Electronic supplementary information (ESI) available: IR, 31P and 183W NMR spectra, and TGA for K-1, K-2, and KNa-3. CSD 424213 (K-1), 424214 (K-2) and 424215 (KNa-3). For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c2dt30355h
Interaction of potassium antimony( iii ) tartrate hydrate K 2 (SbC 4 H 2 O 6 ) 2 ·3H 2 O with the trilacunary Keggin derivatives [ A- -XW 9 O 34 ] 10 (X = Si IV , Ge IV ) and [ A --PW 9 O 34 ] 9 in aqueous acidic medium (pH 4.8) resulted in three novel polyanions, [Sb 3 ( A- -XW 9 O 34 ) 2 ] 11 (X =...
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| Main Authors | , , , , , |
|---|---|
| Format | Journal Article |
| Language | English |
| Published |
31.07.2012
|
| Online Access | Get full text |
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| Summary: | Interaction of potassium antimony(
iii
) tartrate hydrate K
2
(SbC
4
H
2
O
6
)
2
·3H
2
O with the trilacunary Keggin derivatives [
A-
-XW
9
O
34
]
10
(X = Si
IV
, Ge
IV
) and [
A
--PW
9
O
34
]
9
in aqueous acidic medium (pH 4.8) resulted in three novel polyanions, [Sb
3
(
A-
-XW
9
O
34
)
2
]
11
(X = Si
IV
(
1
), Ge
IV
(
2
)) and [Sb
6
O
2
(
A
-PW
6
O
26
)(
A-
-PW
9
O
34
)
2
]
15
(
3
), which were isolated as the hydrated potassium salts K
11
[Sb
3
(
A-
-XW
9
O
34
)
2
]·31H
2
O (X = Si
IV
(
K-1
), Ge
IV
(
K-2
)) and the mixed potassium-sodium salt K
14
Na[Sb
6
O
2
(
A
-PW
6
O
26
)(
A-
-PW
9
O
34
)
2
]·61H
2
O (
KNa-3
) salts, respectively, and characterized by single-crystal X-ray diffraction, IR spectroscopy, as well as elemental and thermogravimetric analyses. The Sb
III
-containing polyanions
1-3
possess unique structural features, as they represent the first examples of sandwich-type POMs with trigonal-pyramidal Sb
III
O
3
linkers. The stability of
1-3
in aqueous media was investigated by multinuclear (
183
W,
31
P) NMR and UV-Vis spectroscopy.
The polyanions [Sb
3
(
A-
-XW
9
O
34
)
2
]
11
(X = Si
IV
, Ge
IV
) and [{Sb
6
O
2
(
A
-PW
6
O
26
)(
A-
-PW
9
O
34
)
2
}]
15
represent the first examples of sandwich-type polyoxotungstates based on Sb
III
ions. |
|---|---|
| Bibliography: | KNa-3 and 424215 10.1039/c2dt30355h Electronic supplementary information (ESI) available: IR 424214 , 183 K-1 P and K-2 For ESI and crystallographic data in CIF or other electronic format see DOI W NMR spectra, and TGA for and CSD 424213 31 |
| ISSN: | 1477-9226 1477-9234 |
| DOI: | 10.1039/c2dt30355h |