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  • Title: An iron(II) complex tripodally chelated with 1,1,1-tris(pyridin-2-yl)ethane showing room-temperature spin-crossover behaviour.
    Author: Ishida T, Kanetomo T, Yamasaki M.
    Journal: Acta Crystallogr C Struct Chem; 2016 Nov 01; 72(Pt 11):797-801. PubMed ID: 27811414.
    Abstract:
    The spin-crossover phenomenon is a reversible low- and high-spin transition caused by external stimuli such as heat. In the novel iron(II) complex salt tetraphenylphosphonium tris(thiocyanato-κN)[1,1,1-tris(pyridin-2-yl)ethane-κ3N,N',N'']ferrate(II), (C24H20P)[Fe(NCS)3(C17H15N3)], the Fe-N bond lengths are in the range 2.027 (2)-2.089 (2) Å, indicating that the specimen consists of comparable molar fractions of the low- and high-spin species at 296 K. A magnetic study confirmed that spin-crossover takes place at around 290 K.
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