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The Largest Metalloid Group 14 Cluster, Ge 18 [Si(SiMe 3 ) 3 ] 6 : An Intermediate on the Way to Elemental Germanium
Author(s) -
Kysliak Oleksandr,
Schrenk Claudio,
Schnepf Andreas
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201510831
Subject(s) - germanium , metalloid , cluster (spacecraft) , crystallography , group (periodic table) , quantum chemical , chemistry , germanium compounds , materials science , molecule , metal , silicon , organic chemistry , computer science , programming language
The oxidation of [Ge 9 (Hyp) 3 ] − (Hyp=Si(SiMe 3 ) 3 ) with an Fe II salt leads to Ge 18 (Hyp) 6 ( 1 ), the largest Group 14 metalloid cluster that has been structurally characterized to date. The arrangement of the 18 germanium atoms in 1 shows similarities to that found in the solid‐state structure Ge(cF136). Furthermore, 1 can be described as a macropolyhedral cluster of two Ge 9 units. Quantum‐chemical calculations further hint at a strained arrangement so that 1 can be considered as a first trapped intermediate on the way from Ge 9 units to elemental germanium with the clathrate‐II structure (Ge(cF136)).