2 5 dichloro 2 5 dimethylhexane mw July 8, 2019 16 32 64 128 2 5-dichloro-2 5-dimethylhexane melting point 2 2-dimethyl-5-methylhexane 2 3-dichloro-4-methylhexane 2 5 dimethylcyclohexane 2 2-dichloro-3-methylpentane