A Combined Magnetic and Mossbauer Spectroscopic Study of High-Spin Half-Sandwich Fe(I) Complexes in Monomeric and Polymeric Configurations.

ABSTRACT: The reduction of the iron(II) half-sandwich precursors [Cp'FeN(R)(SiMe₃)] (R = SiMe₃, 2,6-di-iso-propylphenyl (dipp)) with KC₈ yields the one-dimensional polymeric iron(I) complexes {[Cp'Fe(N(SiMe₃)₃)]K}_n (4) and {[Cp'Fe(N(dipp)(SiMe₃))]K}_n (5). Addition of 18-crown-6 breaks up these chains and affords the monomeric salts [Cp'Fe(N(SiMe₃)₂)][K(18-crown-6)(thf)₂] (6) and [Cp'Fe(N(dipp)(SiMe₃))][K(18-crown-6)(thf)₂] (7). All four compounds were structurally characterized by single-crystal X-ray diffraction analysis and adopt an S = 3/2 spin ground state. Zero-field ⁵⁷Fe Mössbauer spectra uncov

SUBMITTER: Munster K 

PROVIDER: S-EPMC12690587 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature