What term describes the structural relationship between (2R,3R,4S) -2,3,4-trichloroheptane and (2S,3S,4R) -2,3,4-trichloroheptane?

A) not isomers
B) constitutional isomers
C) enantiomers
D) diastereomers
E) conformers

Enantiomers

Mirror-image isomers of a molecule that cannot be superimposed on each other, typically affecting the molecule's interaction with biological systems.

Diastereomers

Stereoisomers that are not mirror images of each other and have different physical properties, including different melting points and boiling points.

Trichloroheptane

An organic compound that consists of a heptane backbone with three chlorine atoms attached, which can exist in several isomeric forms.