Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 44, 2013
Previous Article Next Article

Effect of the counter-anion on the spin-transition properties of a family of Fe(II) tetrazole complexes, [Fe(i4tz)6]X2 (X = ClO4, PF6, SbF6, BF4)

Author affiliations

Abstract

The monodentate ligand 1-isobutyl-1H-tetrazole (i4tz) was used to synthesize a series of iron(II) spin-crossover (SCO) complexes with the general formula [Fe(i4tz)6]X2, where X = ClO4 (1), PF6 (2), SbF6 (3), or BF4 (4). Upon cooling, magnetic susceptibility measurements of compounds 1, 2 and 3 show a reversible one-step spin crossover (SCO) behaviour between HS (S = 2) and LS (S = 0) states without hysteresis. The ClO4 compound shows a gradual spin transition at T1/2 = 208 K at a considerably higher temperature than the other compounds. The larger anions PF6 (T1/2 = 114 K) and SbF6 (T1/2 = 116 K) show more gradual transitions, and a “frozen-in effect” was observed after fast cooling. The crystal structure of [Fe(i4tz)6](SbF6)2 (3) was determined at 296, 200 and 100 K, revealing a reversible first-order phase transition between 200 and 100 K, accompanied by a triplication of the unit cell volume at 100 K. Temperature-dependent vibration and electronic spectroscopic measurements of compound 1 were compared with the magnetic susceptibility measurements.

Graphical abstract: Effect of the counter-anion on the spin-transition properties of a family of Fe(ii) tetrazole complexes, [Fe(i4tz)6]X2 (X = ClO4−, PF6−, SbF6−, BF4−)

Back to tab navigation

Supplementary files

Publication details

The article was received on 26 Aug 2013, accepted on 31 Aug 2013 and first published on 03 Sep 2013


Article type: Paper
DOI: 10.1039/C3DT52339J
Citation: Dalton Trans., 2013,42, 15796-15804

  •   Request permissions

    Effect of the counter-anion on the spin-transition properties of a family of Fe(II) tetrazole complexes, [Fe(i4tz)6]X2 (X = ClO4, PF6, SbF6, BF4)

    M. Tafili-Kryeziu, M. Weil, T. Muranaka, A. Bousseksou, M. Hasegawa, A. Jun and W. Linert, Dalton Trans., 2013, 42, 15796
    DOI: 10.1039/C3DT52339J

Search articles by author

Spotlight

Advertisements