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Topic: chloroarenes have lower boiing points than bromoarenes  (Read 4121 times)

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pixie

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chloroarenes have lower boiing points than bromoarenes
« on: October 10, 2005, 05:53:38 PM »
Can anyone help explain why chloroarenes have lower boiing points than bromoarenes which have lower boiling points than iodoarenes?
« Last Edit: October 27, 2005, 02:03:44 AM by Mitch »
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Re:aryl halides
« Reply #1 on: October 10, 2005, 07:58:32 PM »
Think about the chemical properties that affect boiling point.  How are these different in the three molecules you mentioned?
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pixie

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Re:aryl halides
« Reply #2 on: October 11, 2005, 12:54:50 PM »
Is it the mass of bromine and iodine being heavier?
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Garneck

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Re:aryl halides
« Reply #3 on: October 11, 2005, 02:52:04 PM »
bingo..
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Re:aryl halides
« Reply #4 on: October 11, 2005, 03:49:14 PM »
Yep.  You could also think about the polarizability of Cl vs. Br vs. I.  It is the same argument you would make with dispersion forces of alkanes.
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