Transient Phosphenium and Arsenium Ions versus Stable Stibenium and Bismuthenium Ions.

ABSTRACT: Fluoride abstraction from bis-m-terphenylelement fluorides (2,6-Mes₂ C₆ H₃ )₂ EF (E=P, As) generated the highly reactive phosphenium ion [(2,6-Mes₂ C₆ H₃ )₂ P]⁺ and the arsenium ion [(2,6-Mes₂ C₆ H₃ )₂ As]⁺ , which immediately underwent intramolecular electrophilic substitution and formation of an 1,2,4-trimethyl-6-mesityl-5-m-terphenyl-benzo[b]phospholium ion and an 1,2,4-trimethyl-6-mesityl-5-m-terphenyl-benzo[b]arsolium ion, respectively. The formation of the latter involved a methyl group migration from the ortho-position of a flanking mesityl group to the meta-position. This reactivity of [(2,6-Mes₂ C₆ H_3</

SUBMITTER: Olaru M 

PROVIDER: S-EPMC6900177 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature