A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä

Oxovanadium(V) complexes with tripodal bisphenolate and monophenolate ligands: Syntheses, structures and catalytic activities




TekijätHossain Md Kamal, Haukka Matti, Lisensky George C., Lehtonen Ari, Nordlander Ebbe

KustantajaELSEVIER SCIENCE SA

Julkaisuvuosi2019

JournalInorganica Chimica Acta

Tietokannassa oleva lehden nimiINORGANICA CHIMICA ACTA

Lehden akronyymiINORG CHIM ACTA

Vuosikerta487

Aloitussivu112

Lopetussivu119

Sivujen määrä8

ISSN0020-1693

DOIhttps://doi.org/10.1016/j.ica.2018.11.049


Tiivistelmä
The reactions between [VO(acac)(2)] (acac(-) = acetylacetonate) and the tripodal amino bisphenols 6,6'-(((2-morpholinoethyl)azanediyl)bis(methylene))bis(2,4-di-tert-butylphenol) (H2L1) and 6,6'-(((thiophen-2-ylmethyl) azanediyl)bis(methylene))bis(2,4-di-tert-butylphenol) (H2L2) as well as the tetradentate amino phenol 2,2'-((3,5-di-tert-butyl-2-hydroxybenzyl)azanediyl)bis(ethan-1-ol) (H3L3) afford the complexes [VO(L-1)(OMe)] (1), [VO (L-2)(acac)] (2) and [VO(L-3)] (3), correspondingly. Complexes 1 and 3 can also be prepared using VOSO4 center dot xH(2)O or [VO(OPr)(3)] as vanadium precursors. When [VO(acac)(2)] or VOSO4 center dot xH(2)O is used, mononuclear oxovanadium (V) complexes are formed upon oxidation of the metal precursor. Single crystal X-ray structure analysis show that complexes 1 and 2 have distorted octahedral coordination spheres, in which the amino bisphenolate coordinates in a tetradentate or tridentate manner, respectively, and the coordination spheres are completed by methoxy or acetylacetonato ligands. Complex 3 has a slightly distorted trigonal bipyramidal geometry with an NO4 coordination environment. All three complexes can catalyze epoxidation of cis-cyclooctene at 50 degrees C with tert-butyl hydroperoxide (TBHP) or H2O2 as an oxygen source, and sulfoxidation of thioanisole or methyl-ptolylsulfide proceeds at 25 degrees C using the same oxidants.



Last updated on 2024-26-11 at 20:30