Íon tropilium Referências Menu de navegaçãomolecule


Compostos aromáticosÍons


química orgânicainglêsfrancêsespéciearomáticafórmulatropanoatropinaíoncíclicoheptagonalplanarelétronsregra de Hückelaromaticidadeliganteátomosmetálicosressonânciacarbono




Em química orgânica, o íon tropílio (em inglês e francês tropylium) é uma espécie aromática com fórmula [C7H7]+.[1] Seu nome deriva da molécula tropano (nomeada por sua vez em relação à molécula atropina).


É um íon cíclico heptagonal, planar; possui 6 elétrons π (4n+ 2, onde n=1), o que satisfaz a regra de Hückel de aromaticidade. Pode coordenar-se como um ligante a átomos metálicos.














Tropylium-ion-2D-skeletal.png Tropylium-ion-3D-balls.png
Tropylium-ion-3D-vdW.png
fórmula esquelética modelo de bolas e varetas
modelo espacial


A estrutura mostrada é um composto de sete contribuidores de ressonância no qual cada carbono porta parte da carga positiva.



Referências




  1. ↑ International Union of Pure and Applied Chemistry. "molecule". Compendium of Chemical Terminology - "Gold Book" - Edição da internet. (em inglês)







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