STUDIES ON TAILED METALLOPORPHYRIN COORDINATION-COMPOUNDS .4. THERMODYNAMICS FOR THE AXIAL ADDITION OF NITROGENOUS LIGANDS TO TAILED PORPHYRIN IRON(III) COMPLEXES AND THE NOVEL COORDINATION MODE
Jiao, XD; Huang, JW; Ji, LN
| HERO ID | 4854481 |
|---|---|
| In Press | No |
| Year | 1995 |
| Title | STUDIES ON TAILED METALLOPORPHYRIN COORDINATION-COMPOUNDS .4. THERMODYNAMICS FOR THE AXIAL ADDITION OF NITROGENOUS LIGANDS TO TAILED PORPHYRIN IRON(III) COMPLEXES AND THE NOVEL COORDINATION MODE |
| Authors | Jiao, XD; Huang, JW; Ji, LN |
| Journal | Huaxue Xuebao / Acta Chemica Sinica |
| Volume | 53 |
| Issue | 9 |
| Page Numbers | 861-866 |
| Abstract | Coordination properties between two new tailed porphyrin iron (III) complexes, 5-[o(-)(4-(1-imidazolyl)butoxyl)phenyl]-10, 15, 20-triphenylporphyrinatoiron (III) chloride {[Fe-III(ImTPP)]Cl} and 5-[p-(4-(3-pyridyloxyl)butoxyl]phenyl-10, 15, 20-triphenylporphyrinatoiron (III) chloride {[Fe-III(PyTPP)]Cl}, with nitrogenous ligands and the equilibrium constants for the addition of these ligands to [Fe-III P]Cl in chloroform were studied by spectral technique, Experimental results demonstrated that [Fe-III(PyTPP)]Cl, just similar to [Fe-III(TPP)]Cl, form 1:2 adducts with imidazole or pyridines, respectively, but [Fe-III(ImTPP)]Cl forms only 1:1 adducts with pyridines and form 1: 2 adduct with imidazole. The equilibrium constants for the addition of nitrogenous ligands to [Fe-III(ImTPP)]Cl are 10 similar to 10(3) times as big as those for [Fe-III(TPP)]Cl system. We believe that this result is from the fact that the axial coordination of these ligands to [ Fe-III(ImTPP)]Cl induces the coordination of terminal imidazole group with ferric iron in [Fe-III(ImTPP)]Cl and this kind of coordination mode strengthens the bonding between ferric ion in [Fe-III(ImTPP)]Cl and nitrogen atom in ligand. The novel coordination mode and its structure were identified by the experimental data from UV-vis, H-1 NMR and low-temperature EPR. |
| Wosid | WOS:A1995TD11700006 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |