The complex of Bis(2,4 pentanedionato) Cobalt has been synthesized.The structure has been characterized by infrared spectra and element analysis.The catalytic activity of the complex in the cyclohexene allylic oxidation by oxygen molecule has been studied.The influences of reaction temperature,time,solvents and additives on the oxidation have been determined.The results show that when the oxidation is carried out under the reaction conditions of 70～80℃,4～10h and 2.0Mpa/O 2,the main product is cyclohexene 2 one.The conversion of cyclohexene increases with the rise of the reaction temperature,time and polarity of solvent.Some additives,such as imidazole,could improve the selectivity of cyclohexene 2 one.
The Complex of the ligands containing pyridinecarboxamide with Mn2+, Fe3=,Ru3+ had been Synthesized. The composition andstructure of the metal complex had been determined by UV, IR.TG, XPS and elemental analysis .When the oxidation of cyclohexenewas catalyzed by the complexes with oxygen as oxided, the conversion reached 45.7%, the seleCtivity of cyclohexenone is 64.6%.Ruthenium complexes exhibits better selectivity for 1,2-cyclohexene oxide.
Complex Cobalt(III) di[N-(p-methyl)phenyl-2 -pyridinecarboxamide] dihydrate chloride [Co(p-Me-PPA)2(H2O)2] Cl hadbeen synthesised. The single crystal strUcture of the metal complex had been successfully prepared and determined by fourcircle single crystal diffractometer. When the oxidation of cyclohexene was catalyzed by [Co(p-Me-PPA)2(H2O)2]Cl withmolecular oxygen as oxidant, the conversion reached 59% , the selectivity of cyclohexenone being 75%.
利用羟胺酸BPHA(N 苯甲酰基 N 苯基羟胺)钴配合物Co(BPHA)2作催化剂,对对二甲苯液相氧化反应进行了研究.详细考察了反应温度、催化剂浓度、配体浓度、反应时间和轴配体对该催化反应的影响.实验结果表明:当反应温度为125℃、氧气压力为0.5MPa、催化剂浓度为1.0×10-3mol/L、配体与催化剂的摩尔比为2∶1时、添加四甘醇或聚乙二醇作配体,反应2h时对二甲苯转化率可达41～43%、选择性为92%.本研究丰富了二甲苯选择性氧化的内容,并具有一定的工业应用前景.
