Hydrogen bonding effects on the electronic configuration of five-coordinate high-spin iron(II) porphyrinates.

ABSTRACT: The characterization of a new five-coordinate derivative of (2-methylimidazole)(tetraphenylporphinato)iron(II) provides new and unique information about the effects of forming a hydrogen bond to the coordinated imidazole on the geometric and electronic structure of iron in these species. The complex studied has two crystallographically distinct iron sites; one site has an axial imidazole ligand modified by an external hydrogen bond, and the other site has an axial imidazole ligand with no external interactions. The iron atoms at the two sites have distinct geometric features, as revealed in their molecular structures, and distinct electronic structures, as shown by Mössbauer spectroscopy, although both are high spin (S = 2). The molecule with the external hydrogen bond has longer equatoria

SUBMITTER: Hu C 

PROVIDER: S-EPMC2538548 | biostudies-literature | 2008 Mar

REPOSITORIES: biostudies-literature