N-羟基-N-苯基-2-吡啶甲酰胺钴配合物的合成及均相催化乙苯的氧化反应

近年来，在催化氧化反应领域，人们一直试图用价廉易得的氧作氧化剂，在较温和的条件下催化烃类氧化，以得到价值更高的含氧化合物．研究新的活化分子氧的高活性催化剂成为化学家追求的重要目标之一［１～４］．在各类催化剂中，金属卟啉类［５，６］和金属席夫碱类［...

SYNTHESIS OF N-HYDROXY-N-PHENYL-PYRIDINECARBOXAMIDE AND ITS COBALT COMPLEX AND CATALYTIC BEHAVIORS IN ETHYLBENZENE OXIDATION

New ligand NhydroxyNphenylpyridinecarboxamide (PPHA) and its cobalt complex Cl2 have been synthesized. The yield of PPHA and PHA)2]Cl2 is 49% and 62%, respectively. Their structure has been characterized by UV, MS, IR, NMR and XPS. The catalytic activity of the complex in the ethylbenzene oxidation by oxygen molecule has been studied. The results show that when the oxidation is carried out under the reaction conditions of t=100130, p (O2) =041 MPa and catalyst concentration=0252 mmol/L, the main product is acetophenone. The conversion of ethylbenzene increases with the rise of the reaction temperature or pressure, but changes a little with the increase of catalyst concentration. The conversion and selectivity to form acetophenone are 64% and 81% at 130, 1 MPa O2 and catalyst concentration 1 mmol/L for 6 h, respectively. Reaction time, pressure and catalyst concentration influence less on the selectivity for acetophenone.