Five synthetically tunable Co(II) salts with the general formula (2-amino-5-iodopyridinium)2[Co(II)Cl4-xBrx] have been prepared: (1, (2-amino-5-iodopyridinium)2[CoCl4]·H2O 2, (2-amino-5-iodopyridinium)2[CoCl4-xBrx]·H2O (x = 0.542) 3, (2-amino-5-iodopyridinium)2[CoCl4-xBrx]·H2O (x = 2.34) 4, (2-amino-5-iodopyridinium)2[CoCl4-xBrx]·H2O (x = 3.47) 5, and (2-amino-5-iodopyridinium)2[CoBr4]·H2O). All compounds crystallize in the space group P21/c. Controlling the amount of each halide ion introduced into the reaction mixture can control the relative amounts of chloride and bromide in the products; variable temperature magnetic susceptibility data indicate the presence of single-ion anisotropy in all compounds. In addition, increasing amounts of bromide ion in the samples lead to measurable antiferromagnetic interactions. Additionally, we find that changing the relative amounts of chloride ion and bromide ion changes the anisotropy of the compound.
Magnetically Tunable Tetrahedral Cobalt(II) Halide Salts
Mukda, B. A.; Giantsidis, J.; Landee, C. P.; Dickie, D. A.; Wikaira, J. L.; Turnbull, M. M. Magnetically Tunable Tetrahedral Cobalt(II) Halide Salts. Journal of Coordination Chemistry 2025.
Last updated on 01/07/2025