Question

ball & stick + labels Wame the above compound, identify each substitutent as axial or e table or less stable form. • Omit customary italics from your name. Substitutents R1 and R2 are designated in the order they a increments are available in the table below.

Answer 1

1.

IUPAC name is (1R,3S)-1-chloro-3-methylcyclohexane

CH3 H (1R,3S)-1-chloro-3-methylcyclohexane A = axial

explanation: cyclic structure has six carbon therefore basic name is cyclohexane. The cyclohexane has two substitutent one is chloro and other is methyl. according to alphabetical order chloro will come first and then methyl therefore numbering starts from chloro and then methyl. The chiral carbon attached chloro has R-configuration and chiral carbon attached to methyl has S-configuration. Therefore complete name is (1R,3S)-1-chloro-3-methylcyclohexane

2.

the substitutent R1 = chloro it has axial position

the substitutent R2 = methyl it has axial position

position of R1 = axial

position of R2 = axial

The cyclohexane have six axial position and six equatorial position which is mentioned below

A = axial E = equatorial A E

3. conformation shown is less stable form

explanation: since both chloro and methyl was present in axial position it will have greater 1,3-diaxial interaction, as a result greater steric hinderance and less stable conformation

CH3 (R / (S) more stable less stable