CHM 2211 Chapter 14 Pretest#1  Name: _______________

 

Chapter 14: Conjugated Dienes

 

Part C: Isomers of Dienes  10 Points

Draw at least 10 different diene isomers of formule  C6H10

 

Label each as:   A. Adjacent    B. Conjugated     C. Isolated   Dienes

 

How many total different dienes have this formula?

(You may do as many as you can)

 

Hint:

Hexadiene   six isomers  two conjugated

 

2methyl pentadiene  five isomers  two conjugated

 

3 methyl pentadiene four isomers  three conjugated

 

2,3-dimethylbutadiene  one isomers one conjugated

 

2,3-dimethylbutadiene  zero isomers

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16 isomers and only eight conjugated

 

Here’s another for Practice:

C8H12 dienes which also  have a point of unsaturation which has to be a cyclohexane (do not make three, four five member rings which are also possible). Some we need help with naming as discussed in class which may be a methenyl or ethenyl radical – if that is the proper way to name a double bound coming from the ring to a branch