Observation of the single-ion magnet behavior of d⁸ ions on two-coordinate Co(i)-NHC complexes.

ABSTRACT: The slow magnetic relaxation typical for single-ion magnets has been known for certain low-coordinate 3d metal complexes with d⁶, d⁷, and d⁹ electronic configurations, but never for d⁸ complexes. Herein, we report a study on two-coordinate d⁸ cobalt(i)-N-heterocyclic carbene complexes, for which slow magnetic relaxation behavior was observed for [Co(IMes)₂][BPh₄] (IMes: 1,3-dimesitylimidazol-2-ylidene) under an applied dc field. The system represents the first d⁸ single-ion magnet, and features a fitted energy barrier of U_eff = 21.3 cm^-1 and pre-exponential factor of τ₀ = 6.6 × 10^-6 s. The analog two-coordinate cobalt(i) complexes with different

SUBMITTER: Meng YS 

PROVIDER: S-EPMC5951210 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature