Ligand field strength tuning in the model [Fe(H2Bpz2)2(bipy)] spin crossover complex

Xue, Shufang;Rotaru, Aurelian;Garcia, Yann
(2019) Hyperfine Interactions — Vol. 240, n° 1, p. 91 (2019)

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  • Xue, ShufangUCLouvain
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  • Rotaru, Aurelian
    Author
  • Garcia, Yannorcid-logoUCLouvain
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Abstract
The original magnetism of a model spin crossover complex [Fe(H2Bpz2)2(bipy)] (H2Bpz2 = dihydrobis(1-pyrazolyl)borate, bipy = 2,2′-bipyridine) has been altered from spin state switching to paramagnetic behavior, through grafting a weak electronic-donating group: bromomethyl (in 1) and Br (in 2) onto the bipy ligand at positions C5 and C5´. The introduction of the electron-donating bromo groups into the bipy ligand reduce the π-acceptor character, leading to a weaker ligand field strength, thus stabilizing the high-spin state.
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Xue, S., Rotaru, A., & Garcia, Y. (2019). Ligand field strength tuning in the model [Fe(H2Bpz2)2(bipy)] spin crossover complex. Hyperfine Interactions, 240(1), 91. https://doi.org/10.1007/s10751-019-1638-z (Original work published 2019)