[(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

[(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

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The title compound, a selenonium bromide, C17H33OSeSi+·Br−, was here 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 animationbengal.com 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.