Please use this identifier to cite or link to this item:
doi:10.22028/D291-40287
Title: | σ,π‐Conjugated Bis(germylene) Adducts with NHC and CAACs |
Author(s): | Thömmes, Anna‐Lena Morgenstern, Bernd Zimmer, Michael Andrada, Diego M. Scheschkewitz, David |
Language: | English |
Title: | Chemistry : A European Journal |
Volume: | 29 |
Issue: | 39 |
Publisher/Platform: | Wiley |
Year of Publication: | 2023 |
Free key words: | carbene homologues conjugation cyclic (alkyl)(amino)carbenes N-heterocyclic carbenes subvalent compounds |
DDC notations: | 500 Science |
Publikation type: | Journal Article |
Abstract: | Heavier tetrylenes attract attention for their potential in synthesis, catalysis and small molecule activation. The coordination by N-heterocyclic carbenes (NHCs) and cyclic (alkyl)(amino)carbenes (CAACs) results in substantial structural and electronic differences although typically only one of these yields stable derivatives for one and the same tetrylene. We now report both NHC- and CAAC-coordination to a bridged bis(germylene) motif. The NHC-coordinated bis(germylene) exhibits pyramidal germanium centers with lone pairs of electrons, while with CAAC an unprecedented stable bis(germene) with two Ge=C bonds is isolated. Spectroscopic and crystallographic evidence as well as DFT calculations confirm the effects of σ,π-conjugation between the two germanium centers in both cases. The coordination of NHC is reversible as the reaction with BPh3 liberates the transient bis(germylene) and thus provides an alternative low-temperature route towards polymers with Ge=Ge bonds. |
DOI of the first publication: | 10.1002/chem.202301273 |
URL of the first publication: | https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/chem.202301273 |
Link to this record: | urn:nbn:de:bsz:291--ds-402875 hdl:20.500.11880/36200 http://dx.doi.org/10.22028/D291-40287 |
ISSN: | 1521-3765 0947-6539 |
Date of registration: | 8-Aug-2023 |
Description of the related object: | Supporting Information |
Related object: | https://chemistry-europe.onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1002%2Fchem.202301273&file=chem202301273-sup-0001-misc_information.pdf |
Faculty: | NT - Naturwissenschaftlich- Technische Fakultät |
Department: | NT - Chemie |
Professorship: | NT - Prof. Dr. Guido Kickelbick NT - Prof. Dr. David Scheschkewitz |
Collections: | SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
Files for this record:
File | Description | Size | Format | |
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Chemistry A European J - 2023 - Th mmes.pdf | 3,65 MB | Adobe PDF | View/Open |
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