2 3 dimethylpentane bond line structure July 8, 2019 16 32 64 128 3 isopropyl 2 4 dimethylpentane bond line structure 2 methyl 2 butanol 2 3-dimethylpentane structure 2 3-dimethylpentane boiling point 2 3-dimethylpentane 3 methylhexane