Transannular Ring-Closure Reactions of Octafluorocyclooctatetraene Coordinated to Cobalt and Rhodium Centers. Ligand-Induced Formation of Eta2-Octafluorocycloocta-2,5,7-triene-1,4-diyl and Eta2-Octafluorobicyclo(3.3.0)octa-2,7-die

摘要

Cyclooctatetraene (COT) has a diverse and historically important organometallic chemistry. Recently we have shown that its fluorocarbon analogue octafluorocyclooctatetraene (OFCOT) (1) also possesses a varied coordination chemistry, which in many respects differs significantly from that of COT. Here we describe reactions of OFCOT complexes of cobalt and rhodium with some donor ligands that do not ultimately afford products resulting from nucleophilic attack at OFCOT but rather yield 1:1 adducts arising from ligand incorporation at the metal center with concomitant transformation of coordinated OFCOT to eta octafluorocycloocta-2,5,7-triene-1,4-diyl and eta-octafluorobicyclo-3.3.0octa-2,7-diene-4,6-diyl ligands. Neither type of reaction has precedent in the coordination chemistry of the hydrocarbon analogue COT. Preliminary reports of parts of this work have appeared. Fluorine compounds, Cyclic compounds, Reprints. (mjm)