Isoprene meaning

ī'sə-prēn'
A colorless volatile liquid, C5 H8 , used chiefly to make synthetic rubber.
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A colorless, volatile liquid, CH2:C(CH3)CH:CH2, prepared by the dry distillation of raw rubber or synthetically: when heated with sodium or certain other substances, it polymerizes to form a substance closely resembling natural rubber.
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A colorless, volatile liquid obtained from petroleum or coal tar and occurring naturally in many plants. It is used chiefly to make synthetic rubber. The isoprene in plants occurs in the chloroplasts and is used to build terpenes and other biologically important chemicals. Chemical formula: C5H8.
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(organic chemistry) An unsaturated hydrocarbon, C5H8, that is readily polymerized; natural rubber (caoutchouc) is cis-1,4-polyisoprene, and trans-1,4-polyisoprene is present in gutta-percha and balata; it is the structural basis for the terpenes.
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Origin of isoprene

Coined (1860) by British chemist C. G. Williams, from iso- (“equal; different, isomeric”) + prop- (“three carbon prefix”) + -ene (“alkene suffix”). A misnomer.