Stereoisomerism Flashcards
Can double bonds rotate?
No
What is the shape of a molecule containing a carbon=carbon double bond?
Trigonal planar
What is the bond angle of a trigonal planar molecule?
120
Can atoms rotate around single bonds?
Yes.
What are stereoisomers?
These have the same structural formula but a different arrangement in space.
Why can some alkanes have stereoisomers?
There is a lack of rotation around their double bonds.
When do stereoisomers occur?
When the two double-bonded carbon atoms each have two different atoms or groups attached to them.
What is a Z isomer?
This is where the same groups are either below or above the double bond.
What is an E isomer?
This is where the same groups are positioned across the double bond.
What should you put at the beginning of an E or Z isomer?
“E” or”Z”
Do the groups have to be the same for stereoisomerism?
No
What gets a higher priority?
A large atomic number.
