-CH2CH2CH2CH3 butyl sec-butyl (or) (1-methyl)propyl isobutyl (or) (2-methyl)propyl tert-butyl (or) (1,1-dimethyl)ethyl -X halo- -OR alkoxy- -NO2 -nitro Remember that the alkyl groups along with halo, nitro and alkoxy have the same preference. They have lower pr...