The synthesis and characterization of a series of compounds of the type Re(diimine)(CO)(2)(L)Cl (where L = P(OEt)(3), PMe3) is reported. The non-photochemical ligand substitution (non-PLS) utilizes the trans-labilizing effect of phosphorus ligands to facilitate carbonyl replacement. The non-PIS pathway leads to good yields (>60%) of single isomer products, comparing favorably to the lower yield, mixed isomer products of analogous PLS pathways. The substitution of a carbonyl group by a phosphine/phosphite ligands shifts absorption further into the visible region without diminishing molar absorptivity. The synthesis presented provides a general facile ligand substitution pathway for related light-sensitive neutral rhenium/manganese carbonyl halide compounds. (C) 2015 Elsevier B.V. All rights reserved.
- UV/vis spectroscopy
- LIGAND SUBSTITUTION-REACTIONS
- ELECTROCHEMICAL REDUCTION
- CO SUBSTITUTION