Extreme differences in oxidation states : Synthesis and structural analysis of the germanide oxometallates A 10[Ge 9] 2[WO 4] as well as A 10+x[Ge 9] 2[W 1-xNb xO 4] with A = K and Rb containing [Ge 9] 4- polyanions
(2012) In Inorganic Chemistry 51(7). p.4058-4065- Abstract
Semitransparent dark-red or ruby-red moisture- and air-sensitive single crystals of A 10+x[Ge 9] 2[W 1-xNb xO 4] (A = K, Rb; x = 0, 0.35) were obtained by high-temperature solid-state reactions. The crystal structure of the compounds was determined by single-crystal X-ray diffraction experiments. They crystallize in a new structure type (P2 1/c, Z = 4) with a = 13.908(1) Å, b = 15.909(1) Å, c = 17.383(1) Å, and α = 90.050(6)° for K 10.35(1)[Ge 9] 2[W 0.65(1)Nb 0.35(1)O 4]; a = 14.361(3) Å, b = 16.356(3) Å, c = 17.839(4) Å, and α = 90.01(3)° for Rb 10.35(1)[Ge 9]... (More)
Semitransparent dark-red or ruby-red moisture- and air-sensitive single crystals of A 10+x[Ge 9] 2[W 1-xNb xO 4] (A = K, Rb; x = 0, 0.35) were obtained by high-temperature solid-state reactions. The crystal structure of the compounds was determined by single-crystal X-ray diffraction experiments. They crystallize in a new structure type (P2 1/c, Z = 4) with a = 13.908(1) Å, b = 15.909(1) Å, c = 17.383(1) Å, and α = 90.050(6)° for K 10.35(1)[Ge 9] 2[W 0.65(1)Nb 0.35(1)O 4]; a = 14.361(3) Å, b = 16.356(3) Å, c = 17.839(4) Å, and α = 90.01(3)° for Rb 10.35(1)[Ge 9] 2[W 0.65(1)Nb 0.35(1)O 4]; a = 13.8979(2) Å, b = 15.5390(3) Å, c = 17.4007(3) Å, and α = 90.188(1)° for K 10[Ge 9] 2WO 4; and a = 14.3230(7) Å, b = 15.9060(9) Å, c = 17.8634(9) Å, and α = 90.078(4)° for Rb 10[Ge 9] 2WO 4. The compounds contain discrete Ge 9 4- Wades nido clusters and WO 4 2- (or NbO 4 3-) anions, which are packed according to a hierarchical atom-to-cluster replacement of the Al 2Cu prototype and are separated by K and Rb cations, respectively. The alkali metal atoms occupy the corresponding tetrahedral sites of the Al 2Cu prototype. The amount of the alkali metal atoms on these diamagnetic compounds corresponds directly to the amount of W substituted by Nb. Thus, the transition metals W and Nb appear with oxidation numbers +6 and +5, respectively, in the vicinity of a [Ge 9] 4- polyanion. The crystals of the mixed salts were further characterized by Raman spectroscopy. The Raman data are in good agreement with the results from the X-ray structural analyses.
(Less)
- author
- Hlukhyy, Viktor ; Fässler, Thomas F. ; Ponou, Siméon LU ; Lidin, Sven LU ; Ivleva, Natalia P. and Niessner, Reinhard
- organization
- publishing date
- 2012-04-02
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Inorganic Chemistry
- volume
- 51
- issue
- 7
- pages
- 8 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:84859256775
- ISSN
- 0020-1669
- DOI
- 10.1021/ic202234b
- language
- English
- LU publication?
- yes
- id
- bf70e10c-7110-40aa-ae5d-c18110e069a6
- date added to LUP
- 2019-04-08 14:56:42
- date last changed
- 2022-01-31 18:46:43
@article{bf70e10c-7110-40aa-ae5d-c18110e069a6,
abstract = {{<p>Semitransparent dark-red or ruby-red moisture- and air-sensitive single crystals of A <sub>10+x</sub>[Ge <sub>9</sub>] <sub>2</sub>[W <sub>1-x</sub>Nb <sub>x</sub>O <sub>4</sub>] (A = K, Rb; x = 0, 0.35) were obtained by high-temperature solid-state reactions. The crystal structure of the compounds was determined by single-crystal X-ray diffraction experiments. They crystallize in a new structure type (P2 <sub>1</sub>/c, Z = 4) with a = 13.908(1) Å, b = 15.909(1) Å, c = 17.383(1) Å, and α = 90.050(6)° for K <sub>10.35(1)</sub>[Ge <sub>9</sub>] <sub>2</sub>[W <sub>0.65(1)</sub>Nb <sub>0.35(1)</sub>O <sub>4</sub>]; a = 14.361(3) Å, b = 16.356(3) Å, c = 17.839(4) Å, and α = 90.01(3)° for Rb <sub>10.35(1)</sub>[Ge <sub>9</sub>] <sub>2</sub>[W <sub>0.65(1)</sub>Nb <sub>0.35(1)</sub>O <sub>4</sub>]; a = 13.8979(2) Å, b = 15.5390(3) Å, c = 17.4007(3) Å, and α = 90.188(1)° for K <sub>10</sub>[Ge <sub>9</sub>] <sub>2</sub>WO <sub>4</sub>; and a = 14.3230(7) Å, b = 15.9060(9) Å, c = 17.8634(9) Å, and α = 90.078(4)° for Rb <sub>10</sub>[Ge <sub>9</sub>] <sub>2</sub>WO <sub>4</sub>. The compounds contain discrete Ge <sub>9</sub> <sup>4-</sup> Wades nido clusters and WO <sub>4</sub> <sup>2-</sup> (or NbO <sub>4</sub> <sup>3-</sup>) anions, which are packed according to a hierarchical atom-to-cluster replacement of the Al <sub>2</sub>Cu prototype and are separated by K and Rb cations, respectively. The alkali metal atoms occupy the corresponding tetrahedral sites of the Al <sub>2</sub>Cu prototype. The amount of the alkali metal atoms on these diamagnetic compounds corresponds directly to the amount of W substituted by Nb. Thus, the transition metals W and Nb appear with oxidation numbers +6 and +5, respectively, in the vicinity of a [Ge <sub>9</sub>] <sup>4-</sup> polyanion. The crystals of the mixed salts were further characterized by Raman spectroscopy. The Raman data are in good agreement with the results from the X-ray structural analyses.</p>}},
author = {{Hlukhyy, Viktor and Fässler, Thomas F. and Ponou, Siméon and Lidin, Sven and Ivleva, Natalia P. and Niessner, Reinhard}},
issn = {{0020-1669}},
language = {{eng}},
month = {{04}},
number = {{7}},
pages = {{4058--4065}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Inorganic Chemistry}},
title = {{Extreme differences in oxidation states : Synthesis and structural analysis of the germanide oxometallates A <sub>10</sub>[Ge <sub>9</sub>] <sub>2</sub>[WO <sub>4</sub>] as well as A <sub>10+x</sub>[Ge <sub>9</sub>] <sub>2</sub>[W <sub>1-x</sub>Nb <sub>x</sub>O <sub>4</sub>] with A = K and Rb containing [Ge <sub>9</sub>] <sup>4-</sup> polyanions}},
url = {{http://dx.doi.org/10.1021/ic202234b}},
doi = {{10.1021/ic202234b}},
volume = {{51}},
year = {{2012}},
}