Synthesis of imidazolium-based pentacoordinated organofluorosilicate and germanate salts

Jan Gnidovec; Evelin Gruden; Melita Tramšek; Jernej Iskra; Jaroslav Kvíčala; Gašper Tavčar

doi:10.1039/d3dt00421j

Synthesis of imidazolium-based pentacoordinated organofluorosilicate and germanate salts

Dalton Trans. 2023 Apr 25;52(16):5085-5094. doi: 10.1039/d3dt00421j.

Authors

Jan Gnidovec^{1

2}, Evelin Gruden¹, Melita Tramšek¹, Jernej Iskra³, Jaroslav Kvíčala⁴, Gašper Tavčar^{1

2}

Affiliations

¹ Department of Inorganic Chemistry and Technology, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia. gasper.tavcar@ijs.si.
² Jožef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana, Slovenia.
³ Department of Chemistry and Biochemistry, University of Ljubljana, Faculty of Chemistry and Chemical Technology, Večna pot 113, 1000 Ljubljana, Slovenia.
⁴ Department of Organic Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic.

PMID: 36988481
DOI: 10.1039/d3dt00421j

Abstract

The syntheses of a new triphenyldifluorogermanate and various pentacoordinated organofluorosilicates are presented. The fluorogermane and fluorosilane compounds were obtained from the corresponding chlorosilanes and chlorogermane by halogen substitution with KF. Subsequent reaction with the imidazolium-based fluoride reagent [IPrH][F] (1,3-bis(2,6-diisopropylphenyl)imidazolium fluoride) led to the formation of [IPrH][Ph₃SiF₂] (1), [IPrH][Ph₂SiF₃] (3), [IPrH][Et₂SiF₃] (4), [IPrH][PhSiF₄] (5), [IPrH][EtSiF₄] (6) and [IPrH][Ph₃GeF₂] (7). All the products obtained were characterised by NMR, Raman spectroscopy and X-ray diffraction. The results were supported by DFT calculations of the structurally optimised compounds.