From triplesalen to triplesalacen: Synthesis spectroscopic, redox, and magnetic properties of the trinuclear Cu-3(II) triplesalacen complex

Walleck S, Theil H, Heidemeier M, Heinze-Brückner G, Stammler A, Bögge H, Glaser T (2010)
Inorganica Chimica Acta 363(15): 4287-4294.

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Abstract
The tris(tetradentate) triplesalacen ligand H(6)talacen and its trinuclear copper complex, namely [(talacen) Cu-3(II)], were synthesized and its molecular and electronic structure determined. The ligand is prepared by the triple condensation of 2,4,6-trisacetyl-1,3,5-trihydroxybenzene (1) and excess acacen half-unit (2). The molecular structure of [(talacen)Cu-3(II)] exhibits a strong ligand folding around the central Cu-II-phenolate bonds. This ligand folding is stronger than that observed in the trinuclear copper triplesalen complexes. The electronic absorption spectrum exhibits a prominent intense band at 32 400 cm (1) and d-d transitions around 19 000 cm (1). These spectral features are related to the ligand folding, which opens an O-Ph(p(z))-Cu-II (d(x2-y2)) bonding pathway. Electrochemical studies provide an irreversible oxidation at a relatively low potential of 0.17 V versus Fc(+)/Fc, which is assigned to a ligand-centered oxidation of the central phloroglucinol backbone. A ferromagnetic coupling of J = 1.20 cm (1) (H = Sigma(i
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Walleck S, Theil H, Heidemeier M, et al. From triplesalen to triplesalacen: Synthesis spectroscopic, redox, and magnetic properties of the trinuclear Cu-3(II) triplesalacen complex. Inorganica Chimica Acta. 2010;363(15):4287-4294.
Walleck, S., Theil, H., Heidemeier, M., Heinze-Brückner, G., Stammler, A., Bögge, H., & Glaser, T. (2010). From triplesalen to triplesalacen: Synthesis spectroscopic, redox, and magnetic properties of the trinuclear Cu-3(II) triplesalacen complex. Inorganica Chimica Acta, 363(15), 4287-4294.
Walleck, S., Theil, H., Heidemeier, M., Heinze-Brückner, G., Stammler, A., Bögge, H., and Glaser, T. (2010). From triplesalen to triplesalacen: Synthesis spectroscopic, redox, and magnetic properties of the trinuclear Cu-3(II) triplesalacen complex. Inorganica Chimica Acta 363, 4287-4294.
Walleck, S., et al., 2010. From triplesalen to triplesalacen: Synthesis spectroscopic, redox, and magnetic properties of the trinuclear Cu-3(II) triplesalacen complex. Inorganica Chimica Acta, 363(15), p 4287-4294.
S. Walleck, et al., “From triplesalen to triplesalacen: Synthesis spectroscopic, redox, and magnetic properties of the trinuclear Cu-3(II) triplesalacen complex”, Inorganica Chimica Acta, vol. 363, 2010, pp. 4287-4294.
Walleck, S., Theil, H., Heidemeier, M., Heinze-Brückner, G., Stammler, A., Bögge, H., Glaser, T.: From triplesalen to triplesalacen: Synthesis spectroscopic, redox, and magnetic properties of the trinuclear Cu-3(II) triplesalacen complex. Inorganica Chimica Acta. 363, 4287-4294 (2010).
Walleck, Stephan, Theil, Hubert, Heidemeier, Maik, Heinze-Brückner, Gabriele, Stammler, Anja, Bögge, Hartmut, and Glaser, Thorsten. “From triplesalen to triplesalacen: Synthesis spectroscopic, redox, and magnetic properties of the trinuclear Cu-3(II) triplesalacen complex”. Inorganica Chimica Acta 363.15 (2010): 4287-4294.
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