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A cryptand-encapsulated germanium(II) dication.

Authors
  • Rupar, Paul A
  • Staroverov, Viktor N
  • Baines, Kim M
Type
Published Article
Journal
Science
Publisher
American Association for the Advancement of Science (AAAS)
Publication Date
Nov 28, 2008
Volume
322
Issue
5906
Pages
1360–1363
Identifiers
DOI: 10.1126/science.1163033
PMID: 19039131
Source
Medline
License
Unknown

Abstract

Unlike cations of metals such as sodium or calcium, oxidized silicon and germanium centers generally require strongly bound covalent ligands. We report the synthesis and characterization of a germanium(II) dication in the form of the salt (Ge.cryptand[2.2.2])(O3SCF3)2. The salt is isolated in 88% yield from the reaction of cryptand [2.2.2] and an N-heterocyclic carbene complex of GeCl(O3SCF3) as an air-sensitive, white solid. The crystal structure of the salt shows minimal interaction between the cryptand-encapsulated germanium(II) ion and the two -O3SCF3 counterions. These results suggest a widely expanded role of cryptands and related molecules in stabilizing nonmetallic cations.

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