Generation and NMR studies of stable cations derived from monothia[3.2]- and dithia[3.3]metacyclophanes†
Abstract
Monothia[3.2]- and dithia[3.3]metacyclophanes 1–5 are S-protonated in FSO3H·SbF5 (4 ∶ 1)–SO2 (or SO2ClF) superacids to give their corresponding acidic mono- and bis(sulfonium)