Fluoro-hydrido-oxo and other fluoro-oxo complexes of rhenium (V) containing a triphosphine ligand |
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| Authors: | Dean E. Rende Rouhyuk Kim Chris M. Beck Andrew Wojcicki |
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| Affiliation: | Department of Chemistry, The Ohio State University, Columbus, OH 43210-1173, USA |
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| Abstract: | The fluoro-hydrido-oxo complex [Re(F)(H)(O)Cyttp]+ (3, Cyttp = PhP(CH2CH2CH2PCy2)2) was prepared in high yield from [Re(H2)H4Cyttp]SbF6 (1(SbF6), NaSbF6 and acetone in toluene at reflux. Reaction chemistry of 3 has been studied and, where appropriate, compared with that of the related dihydrido-oxo complex [ReH2(O)Cyttp]+ (2). Unlike 2, which readily reacts with both CO and SO2, 3 was found to be inert to these reagents under comparable conditions. However, 3(SbF6) reacts with NaSbF6 at elevated temperature to afford the difluoro-oxo complex [ReF2(O)Cyttp]+ (4). 4 undergoes fluoride substitution by Cl− or Br− to yield [Re(X)(F)(O)Cyttp]+ (X = Cl (5, Br (6)). 5 can also be obtained by treatment of 6(BPh4) with LiCl. All of these complexes contain mer-Cyttp, and 3–6 contain trans fluoride and oxide ligands as inferred from spectroscopic data. |
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| Keywords: | Ligand substitution Rhenium complexes Hydrido complexes Fluoro complexes Oxo complexes |
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