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Magnetochemistry 2016, 2(1), 7; doi:10.3390/magnetochemistry2010007

Structure and Magnetic Properties of the Spin Crossover Linear Trinuclear Complex [Fe3(furtrz)6(ptol)2(MeOH)4]·4(ptol)·4(MeOH) (furtrz: furanylidene-4H-1,2,4-triazol-4-amine ptol: p-tolylsulfonate)

1
Department of Chemistry, University of Basel, Spitalstrasse 51, Basel, CH-4056, Switzerland
2
School of Chemistry, The University of Sydney, New South Wales 2006, Australia
*
Author to whom correspondence should be addressed.
Academic Editors: Guillem Aromí and José Antonio Real
Received: 15 January 2016 / Revised: 31 January 2016 / Accepted: 2 February 2016 / Published: 16 February 2016
(This article belongs to the Special Issue Spin Crossover (SCO) Research)
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Abstract

The furan-functionalised 1,2,4-triazole ligand furanylidene-4H-1,2,4-triazol-4-amine (furtrz) has been incorporated into the trinuclear complex Fe3(furtrz)6(ptol)2(MeOH)4]·4(ptol)·4(MeOH) (ptol = p-tolylsulfonate) composed of μ1,2-triazole bridges between iron(II) sites, as per one-dimensional chain materials, and terminally coordinated ptol anions and methanol molecules. Magnetic susceptibility measurements reveal a gradual single-step spin crossover (SCO) behavior of one third of the iron(II) sites per trinuclear unit. Single-crystal X-ray diffraction below the transition (90 K) shows the central iron(II) sites undergo a HS to LS transition and the peripheral ones remain HS (HS = high spin; LS = low spin). This is a rare example of a cationic trinuclear SCO material where the discrete unit includes bound anions. View Full-Text
Keywords: spin-crossover; iron(II); trinuclear; crystal structure; magnetism; 1,2,4-triazole spin-crossover; iron(II); trinuclear; crystal structure; magnetism; 1,2,4-triazole
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MDPI and ACS Style

Klein, Y.M.; Sciortino, N.F.; Housecroft, C.E.; Kepert, C.J.; Neville, S.M. Structure and Magnetic Properties of the Spin Crossover Linear Trinuclear Complex [Fe3(furtrz)6(ptol)2(MeOH)4]·4(ptol)·4(MeOH) (furtrz: furanylidene-4H-1,2,4-triazol-4-amine ptol: p-tolylsulfonate). Magnetochemistry 2016, 2, 7.

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