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Structural Investigation of a Fully Ordered closo-Ge-9(2-) Cluster in the Compound [K+(2,2,2-crypt)](2)Ge-9(2-)

Akerstedt, Josefin; Ponou, Simeon LU ; Kloo, Lars and Lidin, Sven LU (2011) In European Journal of Inorganic Chemistry p.3999-4005
Abstract
[K+(2,2,2-crypt)] Ge-2(9)2- containing the deltahedral Zintl anion Ge-9(2-) has been isolated from a solution of K4Ge9 in ethylenediamine in the presence of 2,2,2-crypt, intended as an intermediate in mixed-cluster synthesis. The subsequent crystallographic characterisation shows the closo-Ge-9(2-) cluster unit to be tricapped trigonal-prismatic with a symmetry very close to D-3h. Each Ge-9(2-) unit is surrounded by two 2,2,2-crypt units, each with a chelated K+ cation, viz. [K+(2,2,2-crypt)]. The structure characterisation of this ordered Ge-9(2-) cluster is surprisingly enough the first one reported. A chemical bonding analysis reveals two local minima of D-3h symmetry, with that of lowest energy being highly similar to that resulting... (More)
[K+(2,2,2-crypt)] Ge-2(9)2- containing the deltahedral Zintl anion Ge-9(2-) has been isolated from a solution of K4Ge9 in ethylenediamine in the presence of 2,2,2-crypt, intended as an intermediate in mixed-cluster synthesis. The subsequent crystallographic characterisation shows the closo-Ge-9(2-) cluster unit to be tricapped trigonal-prismatic with a symmetry very close to D-3h. Each Ge-9(2-) unit is surrounded by two 2,2,2-crypt units, each with a chelated K+ cation, viz. [K+(2,2,2-crypt)]. The structure characterisation of this ordered Ge-9(2-) cluster is surprisingly enough the first one reported. A chemical bonding analysis reveals two local minima of D-3h symmetry, with that of lowest energy being highly similar to that resulting from the crystallographic analysis of low-temperature data. The cluster interaction scheme is based on highly delocalised bonding. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Germanium, Zintl anions, Cluster compounds, X-ray diffraction, Cryptands
in
European Journal of Inorganic Chemistry
issue
26
pages
3999 - 4005
publisher
John Wiley & Sons
external identifiers
  • wos:000295265400025
  • scopus:80052436785
ISSN
1099-0682
DOI
10.1002/ejic.201100447
language
English
LU publication?
yes
id
60a3df32-74c5-4037-bc34-0940e44e6332 (old id 2179481)
date added to LUP
2011-10-25 11:06:31
date last changed
2017-07-23 03:25:45
@article{60a3df32-74c5-4037-bc34-0940e44e6332,
  abstract     = {[K+(2,2,2-crypt)] Ge-2(9)2- containing the deltahedral Zintl anion Ge-9(2-) has been isolated from a solution of K4Ge9 in ethylenediamine in the presence of 2,2,2-crypt, intended as an intermediate in mixed-cluster synthesis. The subsequent crystallographic characterisation shows the closo-Ge-9(2-) cluster unit to be tricapped trigonal-prismatic with a symmetry very close to D-3h. Each Ge-9(2-) unit is surrounded by two 2,2,2-crypt units, each with a chelated K+ cation, viz. [K+(2,2,2-crypt)]. The structure characterisation of this ordered Ge-9(2-) cluster is surprisingly enough the first one reported. A chemical bonding analysis reveals two local minima of D-3h symmetry, with that of lowest energy being highly similar to that resulting from the crystallographic analysis of low-temperature data. The cluster interaction scheme is based on highly delocalised bonding.},
  author       = {Akerstedt, Josefin and Ponou, Simeon and Kloo, Lars and Lidin, Sven},
  issn         = {1099-0682},
  keyword      = {Germanium,Zintl anions,Cluster compounds,X-ray diffraction,Cryptands},
  language     = {eng},
  number       = {26},
  pages        = {3999--4005},
  publisher    = {John Wiley & Sons},
  series       = {European Journal of Inorganic Chemistry},
  title        = {Structural Investigation of a Fully Ordered closo-Ge-9(2-) Cluster in the Compound [K+(2,2,2-crypt)](2)Ge-9(2-)},
  url          = {http://dx.doi.org/10.1002/ejic.201100447},
  year         = {2011},
}