A1 Refereed original research article in a scientific journal
Integration of catalyst and nucleophile in oxometal aminobis(phenolate) complexes with ammonium iodide pendant arm groups
Authors: Peuronen Anssi, Salojärvi Esko, Salonen Pasi, Lehtonen Ari
Publisher: Elsevier
Publication year: 2022
Journal: Journal of Molecular Structure
Journal acronym: j mol struct
Article number: 132827
Volume: 1260
DOI: https://doi.org/10.1016/j.molstruc.2022.132827
Publication's open availability at the time of reporting: Open Access
Publication channel's open availability : Partially Open Access publication channel
Web address : https://www.sciencedirect.com/science/article/pii/S0022286022004999
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/174647338
Self-archived copy's licence: CC BY
Self-archived copy's version: Publisher`s PDF
An amine bisphenol ligand with an ammonium iodide group in the pendant arm (H2L) reacts with V, Mo and U oxometal precursors to form oxovanadium(V), dioxomolybdenum(VI) and dioxouranium(VI) species, respectively. In methanol solutions, vanadium(V) and molybdenum(VI) form 1:1 complexes [VO(OMe)(L)]I·2MeOH and [MoO2(L)(H2O)]I·2MeOH, where the cationic charge in the pendant arm is counterbalanced by an iodide anion. Uranium(VI) forms a complex in which the anionic charge of uranate complex unit is compensated by the cationic pendant arm. The complex crystallises as a co-crystal containing a neutral ligand precursor, namely [UO2(L)(OAc)]·[H2L]I·4MeOH. The oxovanadium(V) complex combines a Lewis acid, i.e. a pentacoordinated metal centre with a Lewis basic iodide moiety, which makes it a suitable catalyst for the coupling of CO2 with styrene oxide. The role of the ammonium moiety of the ligand is to carry the iodide nucleophile in the reaction.
Keywords:
chemistry
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