Synthesis, characterization and reactivity of boron‐bridged iron(II) dioxime coordination compounds

Abstract

AbstractReaction of iron(II) dioxime compounds with boron trifluoride diethyl etherate gives clathro compounds. When diphenylboron bromide is used as a reagent, boron‐bridged tetragonal dioxime systems can be prepared via a so‐called pre‐clathro intermediate. This intermediate also shows a tendency to rearrange into a clathro compound. The tetragonal boron‐bridged dioxime compounds Fe(DPGBPh2)2(MeIz)2, Fe(DAGBPh2)2(MeIz)2 and Fe(DMGBPh2)2(MeIz)2 have a structure similar to that of the corresponding hydrogen‐bridged compounds, as deduced from their optical spectra — and for the latter compound, as shown by single crystal X‐ray analysis. They are, however, much more stable towards oxidation. The compounds react with both carbon monoxide and benzyl isocyanide. Coordinated carbon monoxide can be removed by irradiation with light.