Journal article


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


Publication Details
Author(s): 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 F
Publisher: Wiley-VCH Verlag
Publication year: 2004
Volume: 10
Journal issue: 8
Pages range: 1899-1905
ISSN: 0947-6539

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.



How to cite
APA: Saalfrank, R., Deutscher, C., Maid, H., Ako, A.M., Sperner, S., Nakajima, T.,... Heinemann, F. (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.

BibTeX: Download
Share link
Last updated on 2017-09-21 at 03:16
PDF downloaded successfully