Synthesis and NMR investigation on mer-[(ReCl3)-Cl-III(L)(3)] and mer-[(ReCl3)-Cl-III(L)(2)(PPh3)] complexes (L = pyridine-like ligand). X-ray structure of mer-[(ReCl3)-Cl-III(3,5-lut)(3)]

The co-ordination geometry of the monomeric rhenium complexes mer-[(ReCl3)- Cl-III(L)(3)] (L = py 1,3,5-lut 2, 4-pic 3) has been determined in the soli d 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 condi tions utilised. The NMR spectra of the related complexes mer-[(ReCl3)-Cl-II I(L)(2)(PPh3)] (L = py 4, 3,5-lut 5, 4-vinpy 6) have also been reported for comparison purposes. (C) 1998 Elsevier Science Ltd. All rights reserved.