Representing conformations of simple organic molecules, including ethane and butane, by Sawhorse and Newman projections, drawing chair conformations of cyclohexane and substituted cyclohexane, and rel...Representing conformations of simple organic molecules, including ethane and butane, by Sawhorse and Newman projections, drawing chair conformations of cyclohexane and substituted cyclohexane, and relative stability of the conformational isomers are described.