2 2 dimethylbutane structure class 10 July 8, 2019 16 32 64 128 2 3 dimethylbutane structure class 10 2 methyl 2 butanol 2 metil 2 butena + h2 2 2-dimethylbutane melting point 2 2-dimethylbutane boiling point 2 2-dimethylbutane