What is the difference between E-Z isomers and optical isomers?

E-Z isomers (aka geometric or cis-trans isomers) and optical isomers are both examples of stereoisomers, two or more compounds with the same structural formula but with bonds that are arranged differently in space. E-Z isomers have different substitutes at each end of their double bond. As the double bond cannot rotate the substituents are locked in place. For example E - 1,2 dibromoethene and Z- 1,2 dibromoethene differ in the placement of the hydrogen and bromine atoms. Optical isomers (aka enantiomers) are molecules that are mirror images of each other that are non identical and cannot be superimposed.

JM
Answered by Jessie M. Chemistry tutor

9574 Views

See similar Chemistry A Level tutors

Related Chemistry A Level answers

All answers ▸

What chemical test can be used to differentiate between alkenes and alkanes. Describe and explain the results.


How do you decide what the sign of the enthalpy change should be?


Cracking of the unbranched compound E, C6H14, produced the saturated compound F and an unsaturated compound G (Mr = 42). Identify these compounds and write an equation for the reaction.


Why do group 3 metals form more acidic aqueous solutions than group 2 metals?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning