C5H9N

The molecular formula C₅H₉N (molar mass: 83.1317 g/mol, exact mass: 83.073499) may refer to:

• Pentanenitrile, n-BuCN, i.e. C₄H₉–C≡N
• Pivalonitrile, t-BuCN, i.e. (CH₃)₃C–C≡N
• tert-Butyl isocyanide, t-BuNC, i.e. (CH₃)₃C–N⁺≡C:⁻
• Tetrahydropyridine

This set index page lists chemical structure articles associated with the same molecular formula.
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