1. The problem statement, all variables and given/known data What if we stuck with the IUPAC name and called the isopropyl group a 1-methylethyl group? That would definitely reverse the alphabetical priorities; because the substituents here on the hydrocarbon are on equivalent positions, we must give the lower number to the substituent that comes first in the alphabet. But that's the rub! (No isopropyl alcohol pun!) Isopropyl - "I" comes before "M" as in methyl. But if we name the isopropyl group systematically, Methylethyl comes after just methyl in the alphabet. So could the name of this also be: 1,1-dimethyl-7-(1-methylethyl)bicyclo[3.2.0]heptane?