129264-41-1Relevant academic research and scientific papers
Bonding character in tetracoordinate (phthalocyaninato)iron(II) complexes with electron-releasing substituents as studied by M?ssbauer spectroscopy
Ohya, Toshie,Takeda, Jun,Kobayashi, Nagao,Sato, Mitsuo
, p. 3734 - 3737 (2008/10/08)
M?ssbauer spectra of tetracoordinate (phthalocyaninato)iron(II) complexes with electron-releasing substituents were measured. Two kinds of bonding parameters, Σ and Π, that had been introduced by the authors were calculated for substituted phthalocyanines to interpret M?ssbauer parameters in connection with the bonding characteristics of the macrocyclic ligands. The bonding parameters, Σ and Π, represent σ- and π-bonding properties, respectively, and are defined to be larger when more electron density is placed on the iron. Calculated orders of Σ and Π are again in good correlations with the sum of the Hammett σ constants, Σσ, of the substituents: the correlations previously found for electron-withdrawing substituents are revealed to be extended to electron-releasing substituents. The correlations account with reasonable success for a set of M?ssbauer data that are difficult to interpret in the usual way.
