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2008年 第2卷 第1期

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《化学科学与工程前沿（英文）》 >> 2008年 第2卷 第1期 doi: 10.1007/s11705-008-0008-1

Kinetics of halogen-exchange fluorination of 2,6-dichlorobenzaldehyde

College of Chemical Engineering, Nanjing University of Science & Technology;

发布日期： 2008-03-05
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Under the conditions of phase transfer catalysis and nitrobenzene as the solvent, the halogen-exchange fluorination of 2,6-dichlorobenzaldehyde using KF as fluorinating agent was studied. The kinetics was investigated and the reaction rate constants were obtained under the optimum conditions of (KF):(2,6-dichlorobenzaldehyde):(PhPBr):n(acetone-furan crown ether) = 4:1:0.1:0.05 and temperatures of 433 K, 443 K, 453 K and 463 K. The results illustrated the activation energy of the first and the second step is 4.57 × 10 J·mol and 3.53 × 10 J·mol, respectively. The pre-exponential factor is 4.50 × 10 h and 1.08 × 10 h, respectively. Thus a reliable kinetics data could be obtained for further research.

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