Mass spectrometry of π-complexes of transition metals : XXIV. The cyclopentadienyltricarbonylrhenium (CTR) derivatives

Abstract

Mass spectra of η 5-RC 5H 4Re(CO) 3, where R  H, CH 3, I, CH 2OH, CHO, COOH, CN, COCH 3, COOCH 3, CH 2Cl, CHNC 6H 5, C(OH)(CH 3) 2 or C(OH)-(C 6H 5) 2, have been studied. The routes of fragmentation of the complexes under electron impact have been established. Dehydrogenation of decarbonylated ions follows the “intramolecular catalysis” mechanism and yields cluster ions with non-classical bonds. The main process of successive decarbonylation competes only with those decomposition reactions of the molecular ions which give stable 18-electron cations.