trans-dichloro(η(1)-phenyl)trans-bis(pyridine)(pyrazine)rhodium(III) | 198964-07-7

• 英文名称: trans-dichloro(η(1)-phenyl)trans-bis(pyridine)(pyrazine)rhodium(III)
• CAS: 198964-07-7
• 化学式: C₂₀H₁₉Cl₂N₄Rh
• 分子量: 489.209
• InChiKey: KVZZFSRGWZLTIH-UHFFFAOYSA-L

反应信息

• 作为产物：
  描述：

  吡嗪 、 trans-dichloro(η(1)-phenyl)tris(pyridine)rhodium(III) 以 乙醇 为溶剂， 以40%的产率得到trans-dichloro(η(1)-phenyl)trans-bis(pyridine)(pyrazine)rhodium(III)
  参考文献：
  名称：

  Synthesis and characterization of [RhIIICl2(η1-C6H5)(PYR)2(SbPh3)], [RhIIICl2)(η1-C6H5)(PY)2(THZ)], [RHIIICl2(η1-C6H5(PY)2(PYR)], and [RhIIICl2(η1-C6H5)(CEP)(SbPh3)2] [PYR = pyrazine; PY = pyridine; THZ = thiazole; CEP = N-(2-cyanoethylpyrrole)]. Crystal and molecular structure of [RhIIICl2(η1-C6H5)(PYR)2(SbPh3)] and [RhIIICl2(η1-C6H5)(PY)2(THZ)]

  摘要：

  The mononuclear compounds trans-dichloro(eta(1)-phenyl) cis-bis(pyrazine)(triphenylstibine) rhodium(III) (i), and trans-dichloro(eta(1)-phenyl){N-(2-cyanoethylpyrrole)}trans-bis(triphenylstibine) rhodium (III) (3) were prepared from trans-dichloro(eta(1)-phenyl)tris(triphenylstibine)rhodium (III) in ethanol. The mononuclear compounds trans-dichloro(eta(1)-phenyl)trans-bis(pyridine)(thiazole)rhodium(III) (2) and trans-dichloro (eta(1)-phenyl)trans-bis(pyridine)(pyrazine)rhodium(III) (4) were obtained from-trans-dichloro(eta(1)-phenyl) tris(pyridine)rhodium(III) in methanol. Compounds 1 and 2 were analysed via X-ray diffraction techniques from single crystals. The four compounds were characterized by spectroscopy and elemental analysis. The coordination sphere geometry for all the complexes is octahedral; the trans influence exerted by the phenyl ligand is responsible for a long Rh-N bond distance (2.263(3) Angstrom) and of large downfield shifts for H-1 NMR signals. The pyrazine ligands are monodentate in both 1 and 4. In the solid state the pyrazine ligands do not bridge the metal centres, Compounds 1 and 2 are barely stable in solution at room temperature. The thiazole molecule of 2 binds the metal through the nitrogen atom whereas sulfur does not show any donating ability. An extended-Huckel analysis shows that the pyrazine ligands contribute significantly to the frontier unoccupied molecular orbitals. The atomic charges on the non-metal bound nitrogen atoms of pyrazine ligands is -0.175 e in agreement with a bridging ability between two metal centres for this-ligand. (C) 1997 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0277-5387(97)00154-x