Isolation of an Imino-N-heterocyclic Carbene/Germanium(0) Adduct: A Mesoionic Germylene Equivalent†
Bochao Su
Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Nanyang Link 21,Singapore 637371 (Singapore)
Search for more papers by this authorDr. Rakesh Ganguly
NTU-CBC Crystallography Facility, Nanyang Technological University (Singapore)
Search for more papers by this authorDr. Yongxin Li
NTU-CBC Crystallography Facility, Nanyang Technological University (Singapore)
Search for more papers by this authorCorresponding Author
Prof. Dr. Rei Kinjo
Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Nanyang Link 21,Singapore 637371 (Singapore)
Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Nanyang Link 21,Singapore 637371 (Singapore)Search for more papers by this authorBochao Su
Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Nanyang Link 21,Singapore 637371 (Singapore)
Search for more papers by this authorDr. Rakesh Ganguly
NTU-CBC Crystallography Facility, Nanyang Technological University (Singapore)
Search for more papers by this authorDr. Yongxin Li
NTU-CBC Crystallography Facility, Nanyang Technological University (Singapore)
Search for more papers by this authorCorresponding Author
Prof. Dr. Rei Kinjo
Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Nanyang Link 21,Singapore 637371 (Singapore)
Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Nanyang Link 21,Singapore 637371 (Singapore)Search for more papers by this authorThe authors gratefully acknowledge financial support from Nanyang Technological University and PSF/A*STAR (SERC 1321202066) of Singapore.
Graphical Abstract
Germanium zero: Reduction of a chlorogermyliumylidene chelated by an imino-N-heterocyclic carbene ligand with potassium graphite produced a novel cyclic germenium species, which can be viewed as both a germanium(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 GeC2N2 five-membered ring.
Abstract
An autoionization of germanium dichloride/dioxane complex with an imino-N-heterocyclic carbene ligand (L) afforded a novel germyliumylidene ion, [(L)GeCl]+[GeCl3]−, 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 Ge0 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 GeC2N2 five-membered ring. It was also confirmed that the nucleophilic behavior of [(L)Ge] as a two lone-pair donor.
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