Waiting for answer This question has not been answered yet. You can hire a professional tutor to get the answer.

QUESTION

# How do you name and draw stereoisomers for 2-pentene?

Start by drawing a chain of five carbon atoms.

Draw a double bond between carbons 2 and 3.

Note that there are two ways to insert the double bond.

One has the "H" atoms on opposite sides of the double bond; the other has the "H" atoms on the same side of the double bond.

cis-Pent-2-ene has the "H"-atoms on the same side of the double bond.

trans-Pent-2-ene has the "H"-atoms on opposite sides of the double bond.

You can also use the Cahn-Ingold-Prelog system to name the isomers.

On each end of the double bond, the alkyl groups (ethyl and methyl) have higher priority than the "H" atoms.

The first isomer has the higher-priority groups on opposite sides. This is (E)-pent-2-ene.

The second isomer has the higher-priority groups on the same side. This is (Z)-pent-2-ene.