[(1S,2S,3R,4R)-3-Hydroxy-4,7,7-trimethylbicyclo[2.2.1]heptan-2-yl]methyl[(E)-3-(trimethylsilyl)prop-2-enyl]selenonium bromide

Abstract

The title compound, a selenonium bromide, C17H33OSeSi+·Br−, was obtained from the reaction of enantiomerically pure 4,7,7-trimethyl-2-methylselanylbicyclo[2.2.1]heptan-3-ol and (3-bromopropenyl)trimethylsilane in acetone. Due to the chiral bicyclic substituent, the crystal structure is not centrosymmetric and has no symmetry plane, with four chiral C atoms in the cation. The asymmetric unit contains one selenonium cation and one bromide anion. C–H...Br and O–H...Br hydrogen bonds link the ions, forming a one-dimensional R-helical chain-like supramolecular structure.