Liquid phase oxidation of xylenes catalyzed by the tripodal C-scorpionate iron(II) complex [FeCl2{κ3-HC(pz)3}]. (29th March 2017)

• Record Type: Journal Article
• Authors: Mendes, Marta; Ribeiro, Ana Paula C.; Alegria, Elisabete C.B.A.; Martins, Luísa M.D.R.S.; Pombeiro, Armando J.L.
• Is Part Of: Polyhedron. Volume 125(2017)
• Page Start: 151
• Page End: 155
• Publication Date: 2017-03-29
• Subjects: Xylene -- Oxidation -- Scorpionate -- Iron -- Hydrogen peroxide; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2016.10.037
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: Tripodal iron(II) C-scorpionate complex [FeCl2 {η 3 -HC(pz)3 }] (pz = pyrazol-1-yl) acts as homogeneous catalyst for the fast oxidation of xylenes with hydrogen peroxide, under mild conditions, affording the corresponding methylbenzyl l alcohol, tolualdehyde and toluic acid. Abstract: A simple and mild (room temperature) process for oxidation of o -, m - or p -xylene to the corresponding methylbenzyl alcohols, tolualdehydes and toluic acids, using H2 O2 (30% aqueous solution) and the iron(II) C-scorpionate [FeCl2 {κ3 -HC(pz)3 }] (pz = pyrazol-1-yl) catalyst is presented. Remarkably, after 5 min of reaction an overall oxygenates yield of 22% (TOF = 1.3 × 10 2 h −1 ) was obtained. The effects of reaction parameters, such as reaction time, temperature, amount of catalyst, type and amount of oxidant are reported and discussed.