UNIGE document Scientific Article
previous document  unige:2978  next document
add to browser collection
Title

The [Fe(etz)6](BF4)2 Spin-Crossover System - Part One: HS-LS Transition on Two Lattice Sites

Authors
Gütlich, Philipp
Hinek, Roland
Spiering, Hartmut
Schollmeyer, Dieter
Published in Chemistry. 1996, vol. 2, no. 11, p. 1427-1434
Abstract The [Fe(etz),](BF,), spin-cross-over system (etz = 1-ethyl-1 H-tetrazole) crystallizes in space group P1, with the following lattice constants at 298 K: a 10.419(3), b=15.709(1), c = 18.890(2) Å = = 71.223(9), =77.986(10), and = 84.62(1)° V = 2862.0(9) Å3 and Z = 3. Two nonequivalent lattice sites, one without (site A) and one with (site B) inversion symmetry, are observed. The population of the two sites nA:nB is 2:l. Iron(II) on site A undergoes a thermal low-spin (LS) high-spin (HS) transition with T1/2I, = 105 K. whereas that on site B remains in the high-spin state down to cryogenic temperatures. Application of external pressure of up to 1200 bar between 200 and 60 K does not cause formation of the low-spin state on site B. On site A the high-spin state can be populated as a metastable state at 20 K by irradiating the sample with = 514.5 nm; on site B a light-induced population of the low-spin state can be achieved with = 820 nm.
Keywords Iron complexesLIESSTSpin crossoverTetrazoles
Identifiers
Full text
This document has no fulltext available yet, but you can contact its author by using the form below.
Structures
Research group Groupe Hauser
Citation
(ISO format)
HAUSER, Andreas et al. The [Fe(etz)6](BF4)2 Spin-Crossover System - Part One: HS-LS Transition on Two Lattice Sites. In: Chemistry, 1996, vol. 2, n° 11, p. 1427-1434. doi: 10.1002/chem.19960021115 https://archive-ouverte.unige.ch/unige:2978

444 hits

0 download

Update

Deposited on : 2009-09-21

Export document
Format :
Citation style :