Chemistry 212

1. Preliminary Analysis of the Reaction Type:
 

 

• What factors are common to all of these reactions?

[Note that the Br-Br molecule contains an excellent leaving group, Br-.  So it is a Lewis acid and produces an acidic medium.]

• What is the overall result of these reactions?What bonds must be broken and make to convert the reactants to the products in each reactions?
  

• What bonds must be broken and make to convert the reactants to the products in each reactions?
  

• Propose a Simple Model for the Overall Reaction.

• How many different sequences of bond making and breaking steps (mechanisms) seem likely?

• How do these reactions relate to the reactions that we have considered so far this semester in terms of overall change in the reaction and general reaction conditions?
  

• Where are the highest energy electrons in the reactants (including catalysts) of each reaction? 
  

a. Examples:

(1.)  Set a

 

(2.)  Set b 

 

(3.)  Set c 

 

b.

Questions:

 

	(1.)	Consider the reactions in Sets a -> c.  What are the general reaction conditions in most cases?
	(2.)	Which of the sequences (mechanisms) proposed in Part 1 is (are) consistent with the data in each set of reactions (Sets a -> c)?  Explain how the rate trends in Set a and products formed in each reaction in Sets b & c are explained by your selected mechanism for each Set.
	(3.)	Is it possible to explain the data in all three Sets in terms of one of the mechanisms?  If so, what is it and how are the data explained by it?

Class Group Activity # 26 - Out of Class Application:

Class Group Activity # 26 - Summary of Class Discussion: