Amino acid Schiff base complex catalyst for effective oxidation of olefins with molecular oxygen

• Published in: Journal of molecular catalysis. A, Chemical Vol. 147; no. 1; pp. 173 - 178
• Main Authors: Wang, Rong-Min, Hao, Cheng-Jun, Wang, Yun-Pu, Li, Shu-Ben
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 17.11.1999; Elsevier
• Subjects: Aerobic oxidation; Amino acid Schiff base manganese complex; Catalysis; Catalysts: preparations and properties; Chemistry; Cyclohexene; Exact sciences and technology; General and physical chemistry; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Aerobic oxidation; Cyclohexene; Amino acid Schiff base manganese complex; Schiff base; Oxygen; Hydrocarbon; Manganese Complexes; Aminoacid; Organic ligand; Temperature effect; Transition metal Complexes; Catalyst; Monocyclic compound; Ethylenic compound
• ISSN: 1381-1169; 1873-314X
• DOI: 10.1016/S1381-1169(99)00143-0

The amino acid Schiff base manganese complex (Sal–Phe–Mn) was prepared with l-phenylalanine, salicylaldehyde and Mn(OAc) 2·4H 2O. The ligand and the complex were characterized by the infrared spectra, small area X-ray photoelectron spectroscopy, and ICP-AES. In the presence of the manganese complex, cyclohexene was effectively oxidized by molecular oxygen without reductant. The major products of the reaction were 2-cyclohexen-1-ol (–OH), 2-cyclohexen-1-one (CO) and 2-cyclohexen-1-hydroperoxide (–OOH), which was different with typical oxidation of cyclohexene. The influence of reaction temperature and additive for oxidation had been studied. The selectivity of 2-cyclohexen-1-hydroperoxide varied with reaction time and different additives. The mechanism of cyclohexene oxidation had also been discussed.