Tropylium cation

Electron ionization mass spectrum of toluene
. Note parent peak corresponding to molecular mass m = 92
(C7H+8) and highest peak at m − 1 = 91 (C7H+7, stable tropylium cation).

In organic chemistry, the tropylium ion is an aromatic species with a formula of [C₇H₇]. Its name derives from the molecule tropine (itself named for the molecule atropine). Salts of the tropylium cation can be stable, e.g., tropylium tetrafluoroborate. It can be made from cycloheptatriene (tropylidene) and bromine or phosphorus pentachloride.

单词	Tropylium ion
释义	Tropylium ion 英语百科 Tropylium cation In organic chemistry, the tropylium ion is an aromatic species with a formula of [C₇H₇]. Its name derives from the molecule tropine (itself named for the molecule atropine). Salts of the tropylium cation can be stable, e.g., tropylium tetrafluoroborate. It can be made from cycloheptatriene (tropylidene) and bromine or phosphorus pentachloride.
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Tropylium ion

Tropylium cation