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Beilstein Arch. 2023, 202332. https://doi.org/10.3762/bxiv.2023.32.v1
Published 26 Jul 2023
The ruthenium-catalysed ring-closing metathesis of 1,1'-ferrocenylmethylamines provided [8]ferrocenophanes with two nitrogen atoms in the bridge and the (E)‑configuration of the newly formed carbon-carbon double bond. The single-crystal diffraction analyses reveal that these compounds are axially chiral, while the distance between the two nitrogen atoms suggests their potential applications as bidentate ligands. The diaza[8]ferrocenophanes display intriguing solution dynamics that was investigated by means of variable temperature NMR spectroscopy. According to theoretical calculations, the most stable conformer of the ferrocenophane in solution has both N‑substituents occupying the pseudoequatorial positions of the macrocycle.
Keywords: ferrocene; Grubbs’ catalyst; olefin metathesis; single crystal X-ray structure; variable temperature NMR
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Rawiak, K.; Mazur, M.; Enkhbold, T.; Sitek, M.; Kulczyk, S.; Paluch, P.; Guńka, P. A.; Koszytkowska-Stawińska, M.; Buchowicz, W. Beilstein Arch. 2023, 202332. doi:10.3762/bxiv.2023.32.v1
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