Synthesis and NMR investigation on mer-[ReIIICl3(L)3] and mer-[ReIIICl3(L)2(PPh3)] complexes (L = pyridine-like ligand). X-ray structure of mer-[ReIIICl3(3,5-lut)3]

The co-ordination geometry of the monomeric rhenium complexes mer-[ReIIICl3(L)3] (L = py 1, 3,5-lut 2, 4-pic 3) has been determined in the solid state by single X-ray diffraction of the representative complex 2 and in solution by proton NMR spectroscopy. Only a single stable conformation has been found in the solid state and in solution, under the experimental conditions utilised. The NMR spectra of the related complexes mer-[ReIIICl3(L)2(PPh3)] (L = py 4, 3,5-lut 5, 4-vinpy 6) have also been reported for comparison purposes.