Does more branching lead to lower boiling point in alkanes? List the following alkanes in order of increasing boiling point. 
  
  A. $\ce{CH3(CH2)4CH3}$
  B. $\ce{(CH3)2CHCH(CH3)2}$
  C. $\ce{CH3CH2CH(CH3)CH2CH3}$  
  
  Answer: $C&lt;B&lt;A$, low to high.


Why is it that B has not a lower boiling point than C? Is it not more branched? I believe branching decreases surface area, leading to less intermolecular interactions, and to a higher boiling point.
$A$ n-hexane, boiling point 69 degrees C. 

$B$ 2,3 dimethyl butane, boiling point 58 degrees C. 

$C$ 3-methyl pentane, boiling point 63 degrees C.  

$B&lt;C&lt;A$