cyclo‐C₃I₄—The First Saltlike Halocarbon

Abstract

The energy-rich perhalogenocyclopropenes cyclo-C3X4 ( X = F , CI, Br), which are widely used synthetic building blocks, are volatile, thermally relatively stable, covalent compounds."] During our investigations of iodocarbenium ions"." we have now been able to synthesize the last missing member of this class of substances, namely cyclo-C,I, 1; compound 1 differs dramatically in its structure and reactivity from its lighter homologues. 0 VCH Verlagsgesellschaft mhH. 0-6940 Weinheim. 1986

Cyclopropenylium Cations, Cyclopropenones, and HeteroanaloguesRecent Advances

“…In sharp contrast to the tetrahalocyclopropenes 42 (X = F, Cl, Br), which are covalent compounds, the tetraiodo derivative 44 is already ionized by itself into the salt, triiodocyclopropenylium iodide ( 45 ) (eq 18) triiodo compound 45 underwent substitution, as shown in eqs 19 and 20, to give cations 46 and 47 .…”