IIT JEE , AIEEE Forum - Chemistry , Organic Chemistry

konichiwa2x

Hi,

Can someone explain the answer to this question?

How many geometrical isomers are possible for the compound:

My book says the answer is 3.. But I can only make out 2.. Please tell me how.

Asmita

I hope ths ll help.............. followin r d 3 geometrical isomers possible

roshanprizak

There are two double bonds in the compound. So you get for combinations:

1.) Cis - Trans

2.)Cis - Cis

3.)Trans - Cis

4.)Trans - Trans

Now write down all four.

You will see that the cis - trans isomer and the trans - cis isomer are same.this is because the molecule is symmetric from both sides.

So you get 4-1=3.

Please rate my nswer

chem4884

the three isomers will be.....

2-Z,4-Z

2-E,4-E

2-Z,4-E

plz rate the ans