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  • Optical rotations of some compounds along with their structures are given below which of them have D configuration.

Optical rotations of some compounds along with their structures are given below which of them have D configuration.

(i) I, II, III

(ii) II, III

(iii) I, II

(iv) III

Answers (1)

The answer is the option (i). All of the given compounds have D-configuration due to the presence of the -OH group of asymmetric carbon on the right side. So, Option (i) I, II, III is the answer.

The D- and L- configuration is a system used to describe the stereochemistry of chiral carbons in naturally occurring compounds, such as amino acids and sugars:

  • D-configuration: The hydroxyl group is on the right side of the Fischer projection.
  • L-configuration: The hydroxyl group is on the left side of the Fischer projection. 

The D- and L- configuration is a shorthand way to describe enantiomers or non-superimposable mirror images. For example, D-glucose and L-glucose are enantiomers.

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