Question

Draw a dash-wedge structure for the following?
(a) (1R)-1-bromo-1,3,3trimethylcyclohexane

(b) (2S, 4S)- 2-bromo-4-methylhexane

provide r and s please

Answer 1

(a) So, the structure of the molecule from IUPAC name with their numbering of the carbon including their stereochemistry followed by the direction is given as below:-

Since, for writing the structure of the molecule from IUPAC name, first we should find the longest hydrocarbon chain which is called as the parent hydrocarbon chain. After that find the functional group and substituent attached to the parent carbon chain as well the position of both. As we know that, substituent attached to the carbon first then the name of the parent chain followed by the functional group with their position including their stereochemistry. For the confirmation of the configurations R and S there is arrow in the structures which tells the clock wise and anti-clock wise direction.

(1)|(R) (6) (5) (R)-1-bromo-1,3,3-trimethylcyclohexane

(b) So, the structure of the molecule from IUPAC name with their numbering of the carbon including their stereochemistry followed by the direction is given as below:-

Br (2S,4S)-2-bromo-4-methylhexane