title: An X-ray powder diffraction study of the spin-crossover transition and structure of bis(2,6-dipyrazol-1-ylpyrazine)iron(II) perchlorate.
abstract: The crystal structure of the iron(II) spin-crossover compound [Fe(C(10)H(8)N(6))(2)](ClO(4))(2) in the high-spin state has been solved from powder X-ray diffraction data using the DASH program and refined using Rietveld refinement. The thermal spin transition has been monitored by following the change in unit-cell parameters with temperature. The title compound has been found to undergo a crystallographic phase change, involving a doubling of the crystallographic a axis, on undergoing the spin transition.
authors.affiliation: Chemistry Department, Durham University, South Road, Durham DH1 3LE, UK.
authors.forename: Victoria A
authors.initials: VA
authors.lastname: Money
authors.forename: Ivana
authors.initials: I
authors.lastname: Radosavljevic Evans
authors.forename: Jerome
authors.initials: J
authors.lastname: Elhaïk
authors.forename: Malcolm A
authors.initials: MA
authors.lastname: Halcrow
authors.forename: Judith A K
authors.initials: JA
authors.lastname: Howard