Citation: Hong Bo Li, Chuan Qin, Wen Bing Yang, Xiao Ping Hu, Sheng Ying Qin. Dioxygen affinities and catalytic oxidation performance of cobalt(Ⅱ) hydroxamates with benzo-15-crown-5 pendants[J]. Chinese Chemical Letters, ;2007, 18(1): 103-106. doi: 10.1016/j.cclet.2006.11.011 shu

Dioxygen affinities and catalytic oxidation performance of cobalt(Ⅱ) hydroxamates with benzo-15-crown-5 pendants

a College of Material Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China;
b Department of Chemistry, Sichuan University, Chengdu 610064, China

Received Date: 18 April 2006

Fund Project: The authors gratefully acknowledge the grants from the National Natural Science Foundation of China (No. 20072025), Education Office Foundation of Sichuan Province (No. 2005C012) and Sichuan Provincial Department of Science & Technology (No. 2006J13-143) in support of this work.

The oxygenation constants (Ko₂) of cobalt(Ⅱ) hydroxamates (CoL₂¹-CoL₂³) with benzo-15-crown-5 (B15C5) pendants were measured over the range of -5 to +20℃, and the values of thermodynamic parameters (△H⁰ and △S⁰) were calculated based on these (Ko₂) values. Meanwhile, these crowned complexes were employed to the oxidation for p-xylene to p-toluic acid with air at 110△ under normal atmospheric pressure. The effects of B15C5 pendant and the length of chain bonded to B15C5 in these complexes on the O₂-binding capabilities and oxidafon for p-xylene were investigated with the comparison of crown-free analogues CoL₂⁴.
- Benzo-15-crown-5,
- Cobalt(Ⅱ) hydroxamates,
- Dioxygen affinity,
- Catalytic oxidation,
- p-Xylene
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