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|標題:||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)||作者:||Hsaio, D.Z.
|關鍵字:||X-ray diffraction;Manganese(III) N-confused porphyrin;Palladium(II);N-confused porphyrin;SQUID;epr-spectra;manganese(iii);states||Project:||Polyhedron||期刊/報告no：:||Polyhedron, Volume 31, Issue 1, Page(s) 339-344.||摘要:||
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 center dot C6H5CH3; 3 center dot 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 center dot 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 4K, 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. (C) 2011 Elsevier Ltd. All rights reserved.
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