Angewandte Chemie - International Edition
Angewandte Chemie - International Edition
5 years ago

Using N-Heterocyclic Vinyl Ligands to Access Stable Divinylgermylenes and a Germylium Cation

Using N-Heterocyclic Vinyl Ligands to Access Stable Divinylgermylenes and a Germylium Cation
Patricia Andreiuk, Michael J. Ferguson, Eric Rivard, Robert McDonald, Christian Hering-Junghans
Two efficient methods are presented to install σ- and π-electron-donating N-heterocyclic vinyl groups onto main-group elements (E): halosilane elimination and base-induced E−C bond formation. Placement of two NHC=CH− ligands (NHC=N-heterocyclic carbene) onto a GeII center affords a two-coordinate germylene, a heavy congener of the elusive divinyl carbenes. The π-donating ability of this vinylic ligand scaffold was further demonstrated by the synthesis of a three-coordinate germylium cation R3Ge+. Germylenes go vinyl: N-heterocyclic vinyl ligands pave the way for the isolation of the first base-free divinylgermylene, a heavy congener of divinyl carbenes. The π-donating ability of this vinylic ligand scaffold was further demonstrated by the synthesis of a three-coordinate germylium cation R3Ge+.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201609100

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