Sb. Erenburg et al., RELATION BETWEEN ELECTRONIC AND SPATIAL STRUCTURE AND SPIN-TRANSITIONPARAMETERS IN CHAIN-LIKE FE(II) COMPOUNDS, Solid state ionics, 101, 1997, pp. 571-577
EXAFS spectroscopy is used to investigate the characteristic features
of the spatial and electronic structure of the polynuclear iron(II) co
mplexes with 1,2,4-triazoles and various anions. The Spin transition h
as been found to be accompanied by drastic changes in spatial structur
e. The increase in spin transition temperature for the complexes with
variable anions ClO4-, I-, Br-, BF4-, NO3- was found to correlate with
changes in the Fe-N distances and changes in bond covalence determine
d from the chemical shifts in Mossbauer spectra.