Structural Investigation of a Fully Ordered closo-Ge(9)(2-) Cluster in the Compound [K(+)(2,2,2-crypt)](2)Ge(9)(2-)
2011 (English)In: European Journal of Inorganic Chemistry, ISSN 1434-1948, E-ISSN 1099-0682, no 26, 3999-4005 p.Article in journal (Refereed) Published
[K(+)(2,2,2-crypt)] (2)Ge(9)(2-) containing the deltahedral Zintl anion Ge(9)(2-) has been isolated from a solution of K(4)Ge(9) 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.
Place, publisher, year, edition, pages
2011. no 26, 3999-4005 p.
Germanium, Zintl anions, Cluster compounds, X-ray diffraction, Cryptands
IdentifiersURN: urn:nbn:se:kth:diva-45286DOI: 10.1002/ejic.201100447ISI: 000295265400025ScopusID: 2-s2.0-80052436785OAI: oai:DiVA.org:kth-45286DiVA: diva2:452251
FunderSwedish Research Council
QC 201110282011-10-282011-10-282012-12-12Bibliographically approved