| Popis: |
The crystal structures of (2-aza-2-benzyloxycarbonylmethyl-5,10,15,20-tetraphenyl-21-carbaporphyrinato-N,N′,N″)platinum(II) [Pt(2-NCH2COOCH2C6H5NCTPP); 4], (2-aza-2-p-cyanobenzyl-5,10,15,20-tetraphenyl-21-carbaporphyrinato-N,N′,N″)platinum(II) [Pt(2-NCH2-p-C6H4-CNNCTPP); 5] and (2-aza-2-p-trifluoromethylbenzyl-5,10,15,20-tetraphenyl-21-carbaporphyrinato-N,N′,N″)platinum(II) [Pt(2-NCH2-p-C6H4-CF3NCTPP); 6] have been established. The coordination sphere around Pt2+ ion in 4–6 is distorted square planar (DSP). The Pt–C(17) bonds are 1.947(5) A (4), 1.965(6) A (5) and 1.958(5) A (6) and the corresponding one-bond coupling constants 1J[Pt–C(17)] are 990 Hz (4), 980 Hz (5) and 980 Hz (6). The shape of 195Pt satellite lines in 1H spectra of H(19) vary with the magnetic field owing to CSA relaxation of the 195Pt in 4–6. The 13C [C(19)] and 1H [H(19)] chemical shifts of N+ CH(Ar) fragment at 20 °C in CDCl3 are separately located at 156.2 ± 0.7 ppm and 8.01 ± 0.08 ppm for the iminium ion of dipolar form in complexes 4–6. The X-ray diffraction data of N(4)–C(19) = 1.320 ± 0.015 A indicate the existence of dipolar form for 4–6. |
Full Text from ScienceDirect