Ferromagnetic coupling by the spin-polarization mechanism in a trinuclear V-IV triplesalen complex

Theil H, Freiherr C-G, von Richthofen C-GF, Stammler A, Bögge H, Glaser T (2008)
INORGANICA CHIMICA ACTA 361(4): 916-924.

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Abstract
The first trinuclear vanadium complex [(talen(t-Bu2) )V-IV=O)(3) ( 1) of a triple tetradentate triplesalen ligand has been synthesized and characterized. The triplesalen ligand talen(t-Bu2))(6-) provides three salen- like coordination environments bridged in a meta- phenylene arrangement by a phloroglucinol backbone. In the electronic absorption spectrum of 1 all four ligand field transitions are detected below 21400 cm(-1). The region above 23000 cm(-1) is dominated by strong absorption from imine pi ->pi* and ligand-to-ligand CT transitions. The latter may also be described by a combined phenolate-to-vanadium LMCT and vanadium-to-imine MLCT through the empty metal d orbitals in a push-pull type interaction. The temperature-dependent magnetic susceptibility measurements reveal a ferromagnetic coupling of the three V (IV)= O units in the triplesalen complex with J = + 0.44 cm(-1). The correlation of the electronic structure to the weakness of the ferromagnetic coupling by the spin- polarization mechanism in the trinuclear V= O system is discussed. (c) 2007 Elsevier B. V. All rights reserved.
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Theil H, Freiherr C-G, von Richthofen C-GF, Stammler A, Bögge H, Glaser T. Ferromagnetic coupling by the spin-polarization mechanism in a trinuclear V-IV triplesalen complex. INORGANICA CHIMICA ACTA. 2008;361(4):916-924.
Theil, H., Freiherr, C. - G., von Richthofen, C. - G. F., Stammler, A., Bögge, H., & Glaser, T. (2008). Ferromagnetic coupling by the spin-polarization mechanism in a trinuclear V-IV triplesalen complex. INORGANICA CHIMICA ACTA, 361(4), 916-924.
Theil, H., Freiherr, C. - G., von Richthofen, C. - G. F., Stammler, A., Bögge, H., and Glaser, T. (2008). Ferromagnetic coupling by the spin-polarization mechanism in a trinuclear V-IV triplesalen complex. INORGANICA CHIMICA ACTA 361, 916-924.
Theil, H., et al., 2008. Ferromagnetic coupling by the spin-polarization mechanism in a trinuclear V-IV triplesalen complex. INORGANICA CHIMICA ACTA, 361(4), p 916-924.
H. Theil, et al., “Ferromagnetic coupling by the spin-polarization mechanism in a trinuclear V-IV triplesalen complex”, INORGANICA CHIMICA ACTA, vol. 361, 2008, pp. 916-924.
Theil, H., Freiherr, C.-G., von Richthofen, C.-G.F., Stammler, A., Bögge, H., Glaser, T.: Ferromagnetic coupling by the spin-polarization mechanism in a trinuclear V-IV triplesalen complex. INORGANICA CHIMICA ACTA. 361, 916-924 (2008).
Theil, Hubert, Freiherr, Carl-Georg, von Richthofen, Carl-Georg Freiherr, Stammler, Anja, Bögge, Hartmut, and Glaser, Thorsten. “Ferromagnetic coupling by the spin-polarization mechanism in a trinuclear V-IV triplesalen complex”. INORGANICA CHIMICA ACTA 361.4 (2008): 916-924.
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