Journal
INORGANIC CHEMISTRY
Volume 60, Issue 7, Pages 4717-4722Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.0c03655
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The synthesis of a Fe-Ag Hofmann-type complex with unique Ag-N interactions and absence of Ag-Ag interactions is described, contrasting it with a previously synthesized Au complex with Au-Au interactions. Magnetic measurements show a scan-rate-dependent hysteresis, indicating a relatively slow spin transition.
The spin-crossover (SCO) phenomenon is an active area of research. This paper describes the synthesis of an Fe-Ag Hofmann-type complex, {Fe(4-methylpyrimidine)(2)[Ag(CN)(2)](2)}, which demonstrates a one-step SCO and single-layer Hofmann-type structure with Ag-N interactions and no Ag-Ag interactions, which is strikingly different from the previously synthesized complex {Fe(4-methylpyrimidine)(2)[Au(CN)(2)](2)} that contains Au-Au interactions and no Au-N interactions. This difference can be explained in terms of the lack of relativistic effect in the Ag atoms and the different cooperative effects caused by their different structures. A scan-rate-dependent hysteresis is observed using magnetic measurement whereas not using Fe-57 Mossbauer spectroscopy, suggesting that the spin transition is relatively slow.
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