Which compound had the smallest Rf in a solution of ethyl acetate/hexanes? With reference to the structures, explain this result in terms of intermolecular forces.
a) (CH₃)₂CHCH(CH₃)₂
b) BrCHâ‚‚CHâ‚‚CHâ‚‚Cl
c) BrCHâ‚‚CHâ‚‚CHâ‚‚Br
d) CH₃CH₂CH₂CH₃
