Question

Make a model of each of the chair conformations of cis-1,2-dibromocyclo- hexane, and show that they are nonsuperimpoasble mirror images of each other. Is cis-1,2-dibromocyclohexane isomer optically active? The planar structure has a plane of symmetry, but the chair conformation doesn't! Yes _No Although each conformer is chiral, the rapid interconversion between the two at room temperature means they cannot be separated. The compound is not chiral. Identifying chirality in cyclohexane derivatives can seem daunting. Fortunately we can greatly simplify by making using the following rule: If you can find a plane of symmetry in the flat hexagonal drawing of a substituted cyclohexane ring, the molecule is achiral. If you cannot find a plane of symmetry, it is chiral. h. Using this simplification, determine whether the following substituted cyclo- hexane rings are chiral or achiral. Draw plane of symmetry for any achiral molecules. CH3 "CH CHA н, с ен, Г-он Hoc

Answer 1

Cis – 2,2-dibromocyclohexane Br Br I Br a e Br missor image of Y ea they are non-superimposable each other a Xxx Brax I king part flipping Bo B% Mirror Bi i I Br Br but its mirror image are readily interconvertible by flipping one chair conformation to others. - they give non-resoluable racemic modifica Cis-1,2-dibromo cyclohexane is not optically active to have plane of - yo's Drena: 1,2 - dimethylcyclohexane Chiral - don't Symmetry, ane de const in the latest housing pred emu Symmetry. Trans-1,4-dimethylcyclohexane achisalo - halling plane of my symmetry non . Trens-2-chloro cyclohexanol Chiral. Don't have plane of symmetry.