Why Glycine Is Not Optically Active?

Glycine is the only chiral amino acid with a single hydrogen atom as its side chain. The absence of asymmetric carbon atoms makes glycine optically inactive that means glycine does not rotate the plane polarised light.

Is glycine is optically active?

Glycine is the simplest amino acid and is the only amino acid that is not optically active (it has no stereoisomers).

Why does glycine not exhibit optical isomerism?

As it is bonded to 4 different atoms or groups of atoms it shows chirality and has two optical isomers. Glycine is the exception because its R-group is a hydrogen so it is not bonded to 4 different groups of atoms and will not produce isomers that are non-superimposable mirror images so does not demonstrate chirality.

James H. Sterling

James H. Sterling

Environmental Science & Climate Journalist

James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.