Structural explanation of the spectral features of the nonsymmetrical complex {2,3,7,8,12,13,17,18-octaethyl-5-[(methylimino)methyl]porphyrinato-κ4N21,N22,N23,N24}palladium(II)
| Autor: | Ilya A. Zamilatskov, Gelii V. Ponomarev, Dina R. Erzina, Victor A. Tafeenko, Nadezhda M. Kurochkina |
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| Rok vydání: | 2017 |
| Předmět: |
Steric effects
Absorption spectroscopy 010405 organic chemistry Chemistry chemistry.chemical_element Crystal structure 010402 general chemistry Condensed Matter Physics Mass spectrometry 01 natural sciences Porphyrin Planarity testing 0104 chemical sciences Inorganic Chemistry Crystallography chemistry.chemical_compound Computational chemistry Bathochromic shift Materials Chemistry Physical and Theoretical Chemistry Palladium |
| Zdroj: | Acta Crystallographica Section C Structural Chemistry. 73:68-71 |
| ISSN: | 2053-2296 |
| Popis: | The features of porphyrins defining their functionality are related to their conformational flexibility. The degree of nonplanarity of metalloporphyrins depends directly on the number of substituents, their size and their location. The introduction of substituents in themesopositions of β-substituted porphyrins increases the steric interaction and leads to distortions of the porphyrin core. Increasing the distortion of the porphyrin core would augment the bathochromic (red) shift of the electronic absorption spectra. A new nonsymmetrical 2,3,7,8,12,13,17,18-octaethyl-5-[(methylimino)methyl]porphyrin complex of palladium(II), [Pd(C38H47N5)], was synthesized and characterized by NMR, mass spectrometry and X-ray analysis. The features of the electronic absorption spectrum of the synthesized complex are explained by the planarity of the porphyrin core and the π-system of the imino group orthogonal to it. |
| Databáze: | OpenAIRE |
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