Effects of Ligand Halogenation on the Electron Localization, Geometry and Spin State of Low-Coordinate (β-Diketiminato)iron Complexes.

ABSTRACT: This contribution explores the influences of incorporating electron-withdrawing CF₃ and halide groups into β-diketiminate iron complexes of tetrazene and isocyanide. The synthesis of a new halogenated β-diketimine (L^CF3,ClH) was accomplished via two different methods, including a novel microwave-assisted synthesis that improves the yield of the difficult condensation. Treatment of an iron(II) complex of this ligand with reductant and azide gives two diiron complexes with novel tetrazenes as bridging ligands. Structural and Mössbauer data show that the bridging tetrazene is a radical anion. The halogenation of the supporting ligand also influences iron(I) complexes of the type LFe(CN^tBu)₂, which are low-spin and square-planar with alkyl substituen

SUBMITTER: Bellows SM 

PROVIDER: S-EPMC5563838 | biostudies-literature | 2016 Jul

REPOSITORIES: biostudies-literature