Definition of pentamethylene in English:

pentamethylene

noun

Chemistry
  • 1The cyclic hydrocarbon cyclopentane, C₅H₁₀ (now rare).

  • 2The divalent straight-chain radical —(CH₂)₅—, present in pentamethylenediamine.

Origin

Late 19th century; earliest use found in Journal of the Chemical Society.