A Thallium Mediated Route to σ-Arylalkynyl Complexes of Bipyridyltricarbonylrhenium(I)

A simple, one-pot preparation of rhenium(I) σ-arylalkynyl complexes
is reported using thallium(I) hexafluorophosphate as a halogen
abstraction agent. This new route to rhenium σ-alkynyls enjoys
higher yields compared to analogous preparations using silver salts
by eliminating potential electrochemical degradation pathways.