Tertiary phosphines containing ortho-carborane as backbone. Some palladium(II) complexes |
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| Affiliation: | 1. Division of Nutritional Sciences, Cornell University, Ithaca, NY 14853, USA;2. Dell Pediatric Research Institute and Dept. of Pediatrics, Dell Medical School, The University of Texas at Austin, 1400 Barbara Jordan Blvd, Austin, TX 78723, USA;3. Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA 02118, USA;4. Cayuga Medical Center, 101 Dates Drive, Ithaca, NY 14850, USA;5. Department of Chemistry, The University of Texas at Austin, 1400 Barbara Jordan Blvd, Austin, TX 78723, USA |
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| Abstract: | Coordination compounds of the type Pd(HPC)2- X2, Pd(DPC)X2 and Pd(NPC)X2, where X Cl or Br and HPC = 1-diphenylphosphino-o-carborane; DPC = 1,2-bis(diphenylphoshino)-o-carborane; and NPC= 1-bis(dimethylamminophosphino, 2-diphenylphosphino) -o-carborane, have been prepared and characterized by IR, Raman and electronic spectroscopy, magnetic and conductivity measurements, and elemental analyses. The compounds containing the monodentate HPC ligand possess a trans-planar structure, whereas for those containing the bidentate DPC and NPC ligands a cis-planar configuration was found. In all cases, the phosphorus atoms of the tertiary phosphine (HPC) and the ditertiary phosphines (DPC and NPC) are bonded to the palladium atom. The complex [Pd(HPC)Cl2]2 has also been prepared, and a halogen bridge dimeric structure is proposed on the basis of the IR and Raman spectra. |
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