We have observed a reversible high-spin to low-spin transition around 11 kbar at room temperature for the polymeric spin crossover complex Fe(pyridine) 2 [Ni(CN) 4 ] using high pressure Raman spectroscopy. The pressure dependence of vibrational frequencies in the two spin-states has been studied up to 50 kbar. The results suggest that the vibrational entropy change associated with the spin crossover is independent of pressure in this pressure range.
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Molnár et al. (2004) studied this question.
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