Homo-Diels–Alder addition of hexafluorobut-2-yne to a norbornadiene rhodium(I) complex: the crystal structure of the adduct [RhCl(norbornadiene)(C4F6)]4

Abstract

Acetylacetonato(norbornadiene)rhodium(I) reacts with 2 mol. equiv. of hexafluorobut-2-yne to give a complex in which one molecule of the acetylene links the diene to the rhodium via a rhodiacyclopentene ring; however, hexafluorobut-2-yne and chloro(norbornadiene)rhodium(I) dimer give a tetramer, [RhCl(norbornadiene)(C₄F₆)]₄, which is shown by X-ray studies to contain a novel homo-Diels–Alder adduct of the diene and the acetylene.