Spin Crossover in a Four-Coordinate Iron(II) Complex
Journal of the American Chemical Society2011Vol. 133(11), pp. 3824–3827
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Jeremiah J. Scepaniak, T. David Harris, Carola S. Vogel, Jörg Sutter, Karsten Meyer, Jeremy M. Smith
Abstract
The four-coordinate iron(II) phosphoraniminato complex PhB(MesIm)(3)Fe-N═PPh(3) undergoes an S = 0 to S = 2 spin transition with T(C) = 81 K, as determined by variable-temperature magnetic measurements and Mössbauer spectroscopy. Variable-temperature single-crystal X-ray diffraction revealed that the S = 0 to S = 2 transition is associated with an increase in the Fe-C and Fe-N bond distances and a decrease in the N-P bond distance. These structural changes have been interpreted in terms of electronic structure theory.
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