Crystal structure and Hirshfeld surface analysis of 1-[(benzyl-dimethyl-sil-yl)meth-yl]-1-ethyl-piperidin-1-ium ethane-sulfonate

The title mol-ecular salt, C H NSi ·C H O S , belongs to the class of -amino-silanes and was synthesized by the alkyl-ation of 1-[(benzyl-dimethyl-sil-yl)meth-yl]piperidine using diethyl sulfate. This achiral salt crystallizes in the chiral space group 2 . One of the Si-C bonds in the cation is unusually long [1.9075 (12) Å], which correlates with the adjacent quaternary N atom and was verified by quantum chemical calculations. In the crystal, the components are linked by weak C-H⋯O hydrogen bonds: a Hirshfeld surface analysis was performed to further investigate these inter-molecular inter-actions and their effects on the crystal packing.