Spin crossover (SCO) involves a change of spin state in response to an external perturbation such as change in temperature. A number of iron complexes have been identified that display this behavior in the solid state. However, systematic studies have failed to offer definitive insights into what factors affect this behavior and define the temperature at which SCO occurs. To gain insight into the structural dynamics of these complexes, we have undertaken solution NMR studies of a series of Fe complexes that undergo SCO and their Co Analogs, which do not exhibit SCO. The set of complexes allows us to examine structural dynamics in the presence and absence of the SCO phenomenon. The effect of various ligand substitutions and counterions will be discussed.

Solution NMR studies of iron spin crossover compounds and their cobalt analogs

245th National Meeting (2013)

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