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28 Dec 2009 23:27:07 IST

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Madhusudan Sir, Out of cis-1,2-dichloroethene and cis-1,2-dibromoethene, which one has a higher bo

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Madhusudan Sir, Out of cis-1,2-dichloroethene and cis-1,2-dibromoethene, which one has a higher boiling point?The answer is given to be cis-1,2-dibromoethene and I am having a doubt...

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Madhusudan Chavan

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Joined: 9 Mar 2007

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9 Feb 2010 19:05:14 IST

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For the same alkyl group, the boiling points of alkyl halides decrease in the order RI > RBr > RCl > RF. This is because with the increase in the size and mass of halogen, the magnitude of the van der Waals forces of attraction increases. Thus the dibromoethene will have more b.p than dichloroethene.

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