Abstract
The tetrabutylammonium salts of sandwich-type tungstophosphates of general formula B-α-[M 4(H 2O) 2(PW 9O 34) 2] n− , M = Co II, Mn II and Fe III, proved to be catalysts or catalyst precursors for the oxidation of cyclohexane and cyclooctane with hydrogen peroxide, affording the corresponding alcohol, ketone and alkyl hydroperoxide in variable proportions. Depending on the tungstophosphate used, the oxidation of cyclooctane could also give 1,2-epoxycyclooctane or a cyclooctanedione. With the Fe sandwich anion, cycloalkyl hydroperoxide was generally the most abundant product. The conversion of cycloalkanes was always higher than 68% after 12 h of reaction. Oxidation of cyclooctane into cyclooctanone could be obtained with high selectivity (83%) and conversion (92%) using B-α-[Co 4(H 2O) 2(PW 9O 34) 2] 10−. The Fe sandwich complex showed to be the most effective catalyst, with turnover numbers of 1333 for cyclohexane and of 1930 for cyclooctane, after 12 h.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.