The question of cyclic versus acyclic ions: The structure of [C10H12]+˙ gas phase ions

摘要: The extent of isomerization acyclic and cyclic gas phase radical cations composition [C10H12]+˙ has been investigated by using collisionally activated dissociation spectroscopy. Both electron charge exchange ionizaiton were employed to form the ions with various internal energies. consisted ionized phenylbutenes, ring-substituted methyl derivatives allylbenzene phenylpropene, 1-methyl-2-isopropenylbenzene, benzylcyclopropane, phenylcyclobutane, tetralin 1-methylindan. 1-methylindan are most stable C10H12 isomeric ions. formed from olefins having double bond in conjugation aromatic ring retain initial structure a significant extent. However, derived out benzene preferentially cyclize five- six-membered Ring opening small-ring ions, such as benzylcyclopropane occurs, followed closure cation.