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Bis[bis(2,6-diisopropylphenyl)phosphato-μ2-1κO:2κO']-bis(2,2'-bipyridine-κ2N,N')-dilithium toluene disolvate and its catalytic activity in ring-opening polymerisation of ε-caprolactone and L-dilactideстатья
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 15 августа 2019 г.
- Авторы: Kalugin Alexey E., Komarov Pavel D., Minyaev Mikhail E., Lyssenko Konstantin A., Roitershtein Dmitrii M., Nifant'ev Ilya E.
- Журнал: Acta Crystallographica Section E Crystallographic Communications
- Том: 75
- Номер: 6
- Год издания: 2019
- Издательство: International Union of Crystallography
- Местоположение издательства: United Kingdom
- Первая страница: 848
- Последняя страница: 853
- DOI: 10.1107/S2056989019006960
- Аннотация: The solvated centrosymmmtric title compound, [Li2(C24H34O4P)2(C10H8N2)2]·2C7H8, was formed in the reaction between {Li[(2,6-iPr2C6H3-O)2POO](MeOH)3}(MeOH) and 2,2′-bipyridine (bipy) in toluene. The structure has monoclinic (P21/n) symmetry at 120 K and the asymmetric unit consists of half a complex molecule and one molecule of toluene solvent. The diaryl phosphate ligand demonstrates a μ-κO:κO′-bridging coordination mode and the 2,2′-bipyridine ligand is chelating to the Li+ cation, generating a distorted tetrahedral LiN2O2 coordination polyhedron. The complex exhibits a unique dimeric Li2O4P2 core. One isopropyl group is disordered over two orientations in a 0.621 (4):0.379 (4) ratio. In the crystal, weak C—H...O and C—H...π interactions help to consolidate the packing. Catalytic systems based on the title complex and on the closely related complex {Li[(2,6-iPr2C6H3-O)2POO](MeOH)3}(MeOH) display activity in the ring-opening polymerization of [epsilon]-caprolactone and L-dilactide.Keywords: lithium; diaryl phosphate; bipyridine; coordination compound; crystal structure; ring-opening polymerization; cyclic esters.
- Добавил в систему: Комаров Павел Денисович