Unsaturated Vinyl-Type Carbocation [(CH₃)₂C=CH]⁺ in Its Carborane Salts.

ABSTRACT: The isobutylene carbocation (CH₃)₂C=CH⁺ was obtained in amorphous and crystalline salts with the carborane anion CHB₁₁Cl₁₁ ^-. The cation was characterized by X-ray crystallography and IR spectroscopy. Its crystal structure shows a relatively uniform ionic interaction of the cation with the surrounding anions, with a slightly shortened distance between the C atom of the =CH group and the Cl atom of the anion, pointing to a higher positive charge on this group. In the amorphous phase, the asymmetric interaction of the cation with the anion increases, approaching ion pairing. This gives rise to a strong hyperconjugation between the two CH₃ groups and the 2p_z orbital of the central carbon sp² ato

SUBMITTER: Stoyanov ES 

PROVIDER: S-EPMC8223440 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature