Synthesis, structure, and dynamics of six-membered metallacoronands and metallodendrimers of iron and indium

Saalfrank R, Deutscher C, Maid H, Ako AM, Sperner S, Nakajima T, Bauer W, Hampel F, Heß BA, van Eikema Hommes N, Puchta R, Heinemann FW (2004)


Publication Status: Published

Publication Type: Journal article

Publication year: 2004

Journal

Publisher: Wiley-VCH Verlag

Book Volume: 10

Pages Range: 1899-1905

Journal Issue: 8

DOI: 10.1002/chem.200306050

Abstract

In the reaction of the N-substituted diethanolamines (H2L1-3) (1-3) with calcium hydride followed by addition of iron(m) or indium(m) chloride, the iron wheels [Fe6Cl6(L-1)(6)] (4) and [Fe6Cl6(L-2)(6)] (6) or indium wheels [In6Cl6(L-1)(6)] (5), [In6Cl6(L-2)(6)] (8) and [In6Cl6(L-3)(6)] (9) were formed in excellent yields. Exchange of the chloride ions of 6 by thiocyanate ions afforded [Fe-6(SCN)(6)(L-2)(6)] (7). Whereas the structures of 4, 5 and 7 were determined unequivocally by single-crystal X-ray analyses, complexes 8 and 9 were characterised by NMR spectroscopy. Contrary to what is normally presumed, the scaffolds of six-membered metallic wheels are not generally rigid, but rather undergo nondissociative topomerisation processes. This was shown by variable temperature (VT) H-1 NMR spectroscopy for the indium wheel [In6Cl6(L-1)(6)] (5) and is highlighted for the enantiotopomerisation of one indium centre {1/6[S-6-5] reversible arrow 1/6[S-6-5']}. The self-assembly of metallic wheels, starting from diethanolamine dendrons, is an efficient strategy for the convergent synthesis of metallodendrimers.

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How to cite

APA:

Saalfrank, R., Deutscher, C., Maid, H., Ako, A.M., Sperner, S., Nakajima, T.,... Heinemann, F.W. (2004). Synthesis, structure, and dynamics of six-membered metallacoronands and metallodendrimers of iron and indium. Chemistry - A European Journal, 10(8), 1899-1905. https://dx.doi.org/10.1002/chem.200306050

MLA:

Saalfrank, Rolf, et al. "Synthesis, structure, and dynamics of six-membered metallacoronands and metallodendrimers of iron and indium." Chemistry - A European Journal 10.8 (2004): 1899-1905.

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