Spin crossover of a Fe(II) mononuclear complex induced by intermolecular factors involving chloride and solvent ordering

Kenneth Zhang; Matthew J Wallis; Alexander R Craze; Shinya Hayami; Hyunsung Min; Daniel J Fanna; Mohan M Bhadbhade; Ruoming Tian; Christopher E Marjo; Leonard F Lindoy; Feng Li

doi:10.1039/d4dt00706a

Spin crossover of a Fe(II) mononuclear complex induced by intermolecular factors involving chloride and solvent ordering

Dalton Trans. 2024 May 9. doi: 10.1039/d4dt00706a. Online ahead of print.

Authors

Affiliations

¹ School of Science, Western Sydney University, Locked Bag 1797, Penrith, NSW, Australia. Feng.Li@westernsydney.edu.au.
² Department of Chemistry, University of Oxford, Oxford OX1 3TA, UK.
³ Department of Chemistry, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Japan.
⁴ Advanced Materials Characterisation Facility, Western Sydney University, Locked Bag 1797, Penrith, NSW, Australia.
⁵ Mark Wainwright Analytical Centre, University of New South Wales, Kensington, NSW, Australia.
⁶ School of Chemistry, The University of Sydney, NSW 2006, Australia.

PMID: 38721861
DOI: 10.1039/d4dt00706a

Abstract

Two new salts of a mononuclear tripodal Fe(II) complex were prepared, using ClO₄^- and Cl^-. The ClO₄^- sample (1) remained HS at low temperatures, similar to the previously reported BF₄^- analogue. Crystallising with the Cl^- anion (2) led to a markedly different crystal packing arrangement, and engendered SCO activity. This has been correlated to the lower crystal packing density in 2 and the coordination complex conformational differences arising due to the packing motifs of 1 and 2. Further, solvent ordering effects have been proposed to facilitate spin transition behaviour in 2.