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Isolation of an Imino‐N‐heterocyclic Carbene/Germanium(0) Adduct: A Mesoionic Germylene Equivalent
Author(s) -
Su Bochao,
Ganguly Rakesh,
Li Yongxin,
Kinjo Rei
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201406930
Subject(s) - mesoionic , carbene , chemistry , germanium , lone pair , nucleophile , ligand (biochemistry) , adduct , ring (chemistry) , azepine , crystallography , stereochemistry , medicinal chemistry , molecule , organic chemistry , biochemistry , receptor , silicon , catalysis
An autoionization of germanium dichloride/dioxane complex with an imino‐N‐heterocyclic carbene ligand ( L ) afforded a novel germyliumylidene ion, [( L )GeCl] + [GeCl 3 ] − , which was fully characterized. Reduction of the germyliumylidene ion with potassium graphite produced a cyclic species [( L )Ge], which can be viewed as both a Ge 0 species and a mesoionic germylene. X‐ray diffraction analysis and computational studies revealed one of the lone pairs on the Ge atom is involved in the π system on the GeC 2 N 2 five‐membered ring. It was also confirmed that the nucleophilic behavior of [( L )Ge] as a two lone‐pair donor.