Perbrominated Sulfonium-Substituted closo-Decaborates with exo-Polyhedral Amino Groups [2-B10Br9S((CH2)nNH2)2]– (n = 1–3)

Abstract

A method for preparing fully brominated sulfonium derivatives of the closo-decaborate anion with functional amino groups (n-Bu4N)[2-B10Br9S((CH2)nNH2)2]– (n = 1–3) has been developed. The method is based on the interaction between sulfonium derivatives of the closo-decaborate anion with phthalimide groups (n-Bu4N)[2-B10Br9S((CH2)npht)2]– (n = 1–3) and elemental bromine in acetonitrile in an inert atmosphere, followed by removal of the phthalimide protection using methylamine.