Synthesis of Rhenium Carbonyl Complexes Bearing Substituted Pyrrolyl Ligands

The formation of rhenium carbonyl complexes incorporating substituted pyrrolyl ligands was studied: the η5 coordination mode of the pyrrolyl motif was not favored, while several bidentate monosubstituted pyrrolyl rhenium complexes were synthesized. It was shown that these species easily lose one carbonyl in refluxing THF or in the presence of triphenylphosphine.