Metal complexes of 2-aza-2-benzyl-5,10,15,20-tetraphenyl-21-carbaporphyrin: M(2-NCH2C6H5NCTPP) (M=Ni2+, Pd2+) and Mn(2-NCH2C6H5NCTPP)Br (NCTPP=N-confused 5,10,15,20-tetraphenyl porphyrinate)
| Autor: | Jyh-Horung Chen, Jo-Yu Tung, De-Zhi Hsaio, Shin-Shin Wang |
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| Rok vydání: | 2012 |
| Předmět: |
Coordination sphere
Inorganic chemistry chemistry.chemical_element Crystal structure Manganese law.invention Inorganic Chemistry Metal chemistry.chemical_compound Nickel Crystallography chemistry law visual_art Materials Chemistry visual_art.visual_art_medium Physical and Theoretical Chemistry Methylene Electron paramagnetic resonance Palladium |
| Zdroj: | Polyhedron. 31:339-344 |
| ISSN: | 0277-5387 |
| DOI: | 10.1016/j.poly.2011.09.034 |
| Popis: | The crystal structures of (2-aza-2-benzyl-5,10,15,20-tetraphenyl-21-carbaporphyrinato-N,N′,N″) nickel(II) methylene chloride solvate [Ni(2-NCH2C6H5NCTPP); 4], (2-aza-2-benzyl-5,10,15,20-tetraphenyl-21-carbaporphyrinato-N,N′,N″) palladium(II) [Pd(2-NCH2C6H5NCTPP); 5] and bromo(2-aza-2-benzyl-5,10,15,20-tetraphenyl-21-carbaporphyrinato-N,N′,N″) manganese(III) toluene solvate [Mn(2-NCH2C6H5NCTPP)Br·C6H5CH3; 3·C6H5CH3] have been established. The coordination sphere around the Ni2+ ion in 4 (or Pd2+ ion in 5) is distorted square planar (DSP), whereas for Mn3+ in 3·C6H5CH3, it is a square-based pyramid with the Br atom lying in the axial site. The g value of 11.34, measured from parallel polarization of the X-band EPR spectra at 4 K, is consistent with a high spin mononuclear manganese(III) centre (S = 2) in 3. The magnitude of the axial (D) zero-field splitting (ZFS) for the mononuclear Mn(III) centre in 3 was determined approximately to be 1.4 cm−1 by paramagnetic susceptibility measurements and conventional EPR spectroscopy. |
| Databáze: | OpenAIRE |
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