2,2-Dimethylbutane, trivially known as neohexane at William Odling's 1876 suggestion, is an organic compound with formula C6H14 or (H3C-)3-C-CH2-CH3. It is therefore an alkane, indeed the most compact and branched of the hexane isomers — the only one with a quaternary carbon and a butane (C4) backbone.
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