How do you decided which compound is the most or less reactive towards electrophilic substitution? For example, if the compounds are benzene, ethyl benzene, 2-phenylpropane and 2-methyl-2-phenylpropane?
Most reactive towards electrophilic substitution means that the compound itself needs to be an electrophile (so that they don't combine), this means there needs to be a +I effect, right? But +I effect increases with an increase in the number of alkyl groups, so that would indicate that 2-methyl-2-phenylpropane would be the most reactive, but benzene is the answer for the question. Thanks in advance!