Reactions of Alkanes

Reactions of alkanes.

opções binárias etoro Alkanes by their very nature tend to be unreactive molecules. They only undergo two reactions

follow link 1. Combustion

vilka länder kan man köpa Viagra utan recept 2. Free radical substitution.

Combustion.

miglior programma trading on line Any alkane will undergo combustion in excess oxygen to form carbon dioxide and water.

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iqoption apri CH4(g) + 2O2(g)    CO2(g)  + 2H2O(l)

Free radical Substitution.

http://bestff.net/faqs/feed/ Overall a halogen atom replaces a hydrogen atom on an alkane.

buy Seroquel no prescription Here are a couple of key terms that you will need:

source url Free radical: Species with an unpaired electron

http://www.techhelpnumbers.com/font/5374 Homolytic fission: The bond splits equally so that each atom receives one electron. In order for homolytic fission to occur UV light is needed.

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The you tube video explains the process of free radical substitution using chlorine and methane. Other halogens can be used like bromine and they could also use other alkanes like ethane.

The problem is that further substitution can occur. Once the Chloromethane is formed it is possible for it to undergo further reactions with chlorine free radicals. Each time this happens one of the hydrogen atoms of methane will be removed and it will be replaced with a chlorine atom. The video below shows how further substitution can occur:

AQA tend to take a slightly different approach. The tend to start by using a halogenated alkane rather than a standard alkane. I have set up a you tube video to show how these types of questions can be dealt with. You will need to be able to write initiation, propagation and termination reactions for halogenated alkanes rather than just standard alkanes.

 

 

 

 

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