Highly efficient divanadium(V) pre-catalyst for mild oxidation of liquid and gaseous alkanes

Authors: Samik Gupta, Marina V. Kirillova, M. Fátima Guedes da Silva, Armando J.L. Pombeiro

Abstract:
A new binuclear oxovanadium(V) complex bearing an NO₂-donor Schiff base ligand, [{VO(EtO)(EtOH)}₂(1K²O,KN:2K²O,N-L)]·2H₂O (H₄L = bis(2-hydroxybenzylidene)oxalohydrazonic acid) was prepared and fully characterized by IR, 1H NMR and electronic spectroscopies, elemental analysis and single crystal X-ray diffraction. In the presence of 2-pyrazinecarboxylic acid (PCA) or another acid promoter, this compound acts as a highly efficient pre-catalyst towards the oxidation of gaseous and liquid alkanes by aqueous H₂O₂ under mild conditions, in aqueous MeCN. Total yields of oxygenates up to 45% and overall turnover numbers up to 7.8 × 103 are achieved.

Keywords:
C^–H activation
Schiff bases
Hydrogen peroxide
Hydroxyl radical
2-Pyrazinecarboxylic acid

Published in: Applied catalysis A: General  (Volumes 460–461, Pages 1-132, 10 June 2013)

Publisher: Elsevier

ISSN Information: 0926-860X

Highly efficient divanadium(V) pre-catalyst for mild oxidation of liquid and gaseous alkanes

Bình luận của bạn

*

*

*

*

 Captcha

Gửi bình luận nhập lại