CH3
CH3
CH3
CH3
CH
CH
C
CH
CH
CH
C
CH
CH
CH3
CH3
CH
CH
C
CH
CH
CH
CH
C
CH
CH3 CH3
CH3
CH3
Cis – retinal
Trans – retinal
Example :
CH3 – CH ═ CH – CH3
-------------→
2 - butene
CH2 ═ CH – CH2 – CH3
-------------→
1 - butene
Example :
1,2 – dichloroethene
Cl
Cl
C═C
H
H
Example : 1,2
- dichloroethene
Cl
H
C═C
H
Cl
 All will be given a chance 2 answer
 I will be D’ one flashing instructions on screen
 Then, U will be doing Ur all, to comply with the given
instructions.
U will be doing it first on Ur notebook, then if you are
done U just have 2 “shout out” your name 2 class
and said “I can answer that ma’am espie”
U will be given 20 seconds 2 answer on D’ board.
 3 points will be added on your quizzes or exercises
for every correct answer.
 Good luck everyone!!!
O
Draw the CIS and TRANS isomers of 1,2 – difluoroethene
║
F
F
F
H
C═C
H
C═C
H
H
F
Draw the CIS and TRANS
O isomers of the molecular
formula C6H║
12 or 3 – hexene
CH3 – CH2
CH2 – CH3 H
C═C
H
CH2 – CH3
C═C
H
CH3 – CH2
H
O
║
H
CH3 – CH2
H
C═C
C═C
H
CH2 – CH3
H
O
║
H
H
C═C
Br
C═C
C═C
CH3 – CH2
Cl
Br Cl
CH2 – CH3
Draw the CIS and TRANS
O isomers of the molecular
formula C6H10F2 double
║ bond is located at carbon 3
CH3 – CH2
CH2 – CH3 F
C═C
F
CH2 – CH3
C═C
F
CH3 – CH2
F
O
║
H
H
C═C
3HC
C═C
C═C
Cl
Cl
Cl
Cl
CH2 – CH3