E/z isomers vs cis trans

when do you use cis trans and when do you use e z
for example
if there are 2 same groups but 2 different groups
would you use e z or would you use cis trans
thanks x

^need help with this too acc i thought they were the same thing

when do you use cis trans and when do you use e z
for example
if there are 2 same groups but 2 different groups
would you use e z or would you use cis trans
thanks x

when do you use cis trans and when do you use e z
for example
if there are 2 same groups but 2 different groups
would you use e z or would you use cis trans
thanks x

E-Z naming is the more modern version of trans-cis.

Z comes from the German "zusammen", meaning "together", so Z (or cis) isomers are where the smaller molar mass groups are on the same side across a feature with limited rotation (eg a double bond).

E comes from the German "entgegen", meaning "apart", so E (or trans) isomers are where the groups with smaller molar mass are on opposite sides across a double bond (or other feature with limited rotation).

It may be helpful to look at some images online. Google Images is your friend.