Pyridazine–derived N5 and N6 ligands as a rigid back bones for Fe (II) Spin Crossover complexes
DOI:
https://doi.org/10.52981/jfst.vi8.1964Keywords:
Spin crossover, Iron complexes, PyridazineAbstract
Novel pyridazine-based tridentate ligands 3-(6-(3-aryl-1H-pyrazol-1-yl) pyridin-2-yl) pyridazines (3) were synthesized, characterized and utilized for the synthesis of iron (II) spin-crossover complexes of the type [Fe (3)2] (ClO4)2. All newly prepared compounds were characterized by 1H, 13C {1H} NMR and UV-Vis spectroscopy, CHN elemental analysis and ESI-TOF mass-spectrometry. Single crystals were grown for X-ray diffraction study using the diffusion strategy.
Some of these complexes show transition from the low-spin state (LS) to high-spin state (HS) at ambient temperature and above (T½ = 311 K), associated with a change in coordination number (CN) from CN 6 to CN 8. This leads to a significant reduction in the equilibrium rate for the SCO equilibrium.
References
F Gärtner., D. Cozzula, S. Losse, A. Boddien, G. Anilkumar, H. Junge, T. Schulz and N. Marquet, Chem. Eur. J., 2011, 6998–7006.
P. Guionneau., M. Marchivie, G. Bravic, J.-F. Létard and D. Chasseau, Top. Curr. Chem., 2004, 234, 97–128.
Holm Petzold, and Silvio Heider, Eur J Inorg Chem, 2011, 1249 – 1254
Holm Petzold, Gerald Hörner, Linda Schnaubelt and Tobias Rüffer, Dalton Trans., 2018 (47), 17257 – 17265.
O Kahn., C. J. Martinez, Science, 1998, 297, 44–48.
F Létard.J., P. Guionneau, O. Nguyen, J. S. Costa, S. Marcén, G. Chastanet, M. Marchivie, L. Goux-Capes, Chem. Eur. J. 2005, 11, 4582–4589.
Philipp Gutlich, Yann Garcia and Harlod A. Goodwin, Chem Soc Rev, 2000, 29, 419 – 427.
J.Real A., A. B. Gaspar, M. C. Munoz, Dalton Trans, 2005, 2062 – 2079
Silvio Heider, Holm Petzold, and Georg Teucher, Eur. J. Inorg. Chem. 2013, 2382–2388
Silvio Heider, Holm Petzold, Guillaume Chastanet, Stephan Schlamp, Tobias Rüffer, Birgit Weberc and Jean-François Létard, Dalton Trans, 2013, 42, 8575 – 8584
B.Weber, Coord. Chem. Rev., 2009, 253, 2432–2449.
