Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 13, 2017
Previous Article Next Article

Magnetostructural relationship for μ2-phenoxido bridged ferric dimers

Author affiliations

Abstract

Three Fe(III) dimers, [Fe2(L-H)2]·2CH3CN (1), [Fe2(L-OCH3)2] (2) and [Fe2(L-OC2H5)2]·2CH3CN (3), containing the pentadentate O,N,N,O,O-donor Schiff-base ligands with variable size pendants, were synthesized and structurally characterized. The three ligands were generated in situ from 2-(iminomethyl)phenol, 2-methoxy-6-(iminomethyl)phenol and 2-ethoxy-6-(iminomethyl)phenol, respectively. All three crystal structures contain centrosymmetric dimers of edge-sharing octahedra of Fe(III) ions through a pair of μ2-phenoxido bridges. The exchange coupling is ferromagnetic for 1 (J = +0.47(1) cm−1, ∠Fe–O–Fe = 98.02°) and 2 (J = +0.86(1) cm−1, ∠Fe–O–Fe = 97.17°), but antiferromagnetic for 3 (J = −0.72(1) cm−1, ∠Fe–O–Fe = 98.53°), which are correlated by high-field electron paramagnetic resonance revealing moderate magneto-anisotropy of D = −0.24(3) cm−1, E = 0.08(1) cm−1 for 1, D = −0.38(1) cm−1, E = 0.11(1) cm−1 for 2, and D = 0.30(3) cm−1, E = 0.02(1) cm−1 for 3. The exchange couplings were further estimated by DFT calculations, which gave the finest Fe–O–Fe angle of 97.83° for the ferromagnetic–antiferromagnetic crossover.

Graphical abstract: Magnetostructural relationship for μ2-phenoxido bridged ferric dimers

Back to tab navigation

Supplementary files

Article information


Submitted
11 Jan 2017
Accepted
27 Feb 2017
First published
28 Feb 2017

Dalton Trans., 2017,46, 4317-4324
Article type
Paper

Magnetostructural relationship for μ2-phenoxido bridged ferric dimers

F. Yu, Z. Cao, J. Ge, Y. Sun, Z. Ouyang, J. Zuo, Z. Wang and M. Kurmoo, Dalton Trans., 2017, 46, 4317
DOI: 10.1039/C7DT00110J

Social activity

Search articles by author

Spotlight

Advertisements