Multiple choice

Which of the following compounds is composed of a benzene ring fused with a cyclopentene ring?

  1. Indole

  2. Isoindole

  3. Isoindene

  4. Indene

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Indene is a flammable polycyclic hydrocarbon. It is composed of a benzene ring fused with a cyclopentene ring. This aromatic liquid is colourless although samples often are pale yellow. The principal industrial use of indene is in the production of indene/coumarone thermoplastic resins.