What is "cycloheptatriene"

n. (context organic compound English) A cycloalkene having a seven-membered ring and three double bonds; removal of a hydride ion produces the aromatic tropylium ion

Cycloheptatriene (CHT) is an organic compound with the formula CH. This colourless liquid has been of recurring theoretical interest in organic chemistry. It is a ligand in organometallic chemistry and as a building block in organic synthesis. Cycloheptatriene is not aromatic, as reflected by the nonplanarity of the methylene bridge (-CH-) with respect to the other atoms.