1. Organic and biochemistry
Reaction of the alkane
halogenation.
Combustion.
Assistance Lecturer Amjad Ahmed Jumaa

2. Reactions of alkanes
1- Halogenations. Look at the following general reaction:

3. Example:
Other example :
The reaction of isopantane with chlorine gas ( at C°) will yield a mixture of (2-chloro-2-methyl-butane)
Which is the main product:
(CH3)2CHCH2CH3 + Cl2 / C° (CH3)C(Cl)CH2CH3 + (CH3)2CHCH2CH2Cl

4. Problem: for the following alkanes write their reactions with the chlorine gas? Determine the product of highly percentage?
1- Propane n-Butane
Solution:

5. Follow problem:
Determine the names of mixture of halo alkanes when 2-methyl hexane treatment with chlorine gas under light and 25º?
B) Determine the names of the products of the alkyl bromide when 3-bromo-heptane treatment with chlorine gas at room temperature?

6. 2-combustion. For the following reaction:
Example: the combustion of normal pentane in the excess of the oxygen

7. Follow example: write the balanced equation for the combustion of 2-methyl butane with the oxygen? And predict the sign of the change in the enthalpy?
Write the balanced equation for the combustion of ( 2 mole ) of pentane with the oxygen ? And explain why the sign of the enthalpy is negative ?