Chromium(II) alkylcyclopentadienyl complexes with carbon or hydride donor ligands

0552142 - FZÚ 2022 RIV US eng J - Článek v odborném periodiku
Smytschkow, I. - Gidt, W. - Sun, Y. - Langer, J. - Böttcher, T. - Kubíčková, Lenka - Kaman, Ondřej - Sitzmann, H.
Chromium(II) alkylcyclopentadienyl complexes with carbon or hydride donor ligands.
Organometallics. Roč. 40, č. 17 (2021), s. 2951-2969. ISSN 0276-7333. E-ISSN 1520-6041
Institucionální podpora: RVO:68378271
Klíčová slova: cyclopentadienyl complexes * mononuclear and dinuclear compexes * chromium complexes * exchange coupling * NMR spectroscopy * alkylcyclopentadienyl ligands
Obor OECD: Organic chemistry
Impakt faktor: 3.837, rok: 2021
Způsob publikování: Omezený přístup
https://doi.org/10.1021/acs.organomet.1c00159

Alkylcyclopentadienylchromium(II) bromide dimers [Cp‴Cr(μ-Br)]2 and [5CpCr(μ-Br)]2 (Cp‴ =tri(tert-butyl)cyclopentadienide, 5Cp = pentaisopropylcyclopentadienide) were used as starting compounds for replacement of bromide with methyl, hydride, phenyl, phenylacetylide, cyanide, or tetrahydroaluminate anions and afforded dinuclear chromium(II) complexes except for cyanide and tetrahydroaluminate, where tetranuclear products were isolated. Mononuclear chromium complexes were synthesized by N-heterocyclic carbene addition to the bromide complex or by bromide substitution with a cyclopentadienyl or another alkylcyclopentadienyl ligand. Strong antiferromagnetic coupling with J1,2 = −206 cm-1 of two high-spin Cr(II) central atoms has been found for the dinuclear hydride [Cp‴Cr(μ-H)]2. Diamagnetic behavior was observed only for the tetranuclear aluminumtetrahydro-tri(tert-butyl)chromate(II).
Trvalý link: http://hdl.handle.net/11104/0327385