Rhodium complex encapsulated functionalized hexagonal mesoporous silica for heterogeneous hydroaminomethylation

Authors: N. Sudheesh, Ram S. Shukla

Abstract: 
HRh(CO)(PPh₃)₃ complex was encapsulated into the pores of amino functionalized hexagonal mesoporous silica. The catalyst was characterized by physico-chemical techniques like P-XRD, 31P-CPMAS NMR, FT-IR, SEM, ICP and N₂ adsorption analysis. The catalyst was active for hydroaminomethylation and a variety of alkenes and amines were used as reactants for hydroaminomethylation. The catalyst afforded to achieve 100% conversion with high (>95%) selectivity to corresponding amines. Parametric variations were performed by taking 1-hexene and morpholine as representative reactants for the study of catalyst amount, temperature, pressure and 1-hexene:morpholine ratio. Significant amounts of aldehydes and enamines were observed during the course of the reaction indicating that there could be two possible rate determining steps. The catalyst was effectively recycled up to five times without much loss in its activity and selectivity.

Keywords:
Hexagonal mesoporous silica
Rhodium complex
Hydroaminomethylation
Heterogeneous catalyst

Published in: Applied catalysis A: General  (Volume 453, Pages 1-402, 26 February 2013)

Publisher: Elsevier

ISSN Information: 0926-860X

Rhodium complex encapsulated functionalized hexagonal mesoporous silica for heterogeneous hydroaminomethylation

Bình luận của bạn

*

*

*

*

 Captcha

Gửi bình luận nhập lại