Solved Problem 4-1:Solution The longest carbon chain contains eight carbon atoms,so this compound is named as an octane.Numbering from left to right gives the first branch on C2;numbering from right to left gives the first branch on C3,so we number from left to right. CH 8 CH-CH, CH,CH, CH,- CH-CH-CH,-CH-CH3 CH CH CH Copyrgnt 2010 4-isopropyl-2,2,3,6-tetramethyloctaneThe longest carbon chain contains eight carbon atoms, so this compound is named as an octane. Numbering from left to right gives the first branch on C2; numbering from right to left gives the first branch on C3, so we number from left to right. Solved Problem 4-1: Solution 4-isopropyl-2,2,3,6-tetramethyloctane