Rates of Claisen rearrangement determined with a flow-type high-temperature and high-pressure NMR probe

Rate constants of Claisen rearrangement of allyl phenyl ether in subcritical water (272–306 °C) at 25.4 MPa were determined. The activation energy in this temperature range was evaluated to be 106 ± 5 kJ mol −1. To study the kinetics of reactions occurring in water at pressures up to 40 MPa and temp...

Full description

Saved in:

Bibliographic Details
Published in:	The Journal of supercritical fluids Vol. 42; no. 1; pp. 104 - 109
Main Authors:	Mukaide, M., Urasaki, Y., Takegoshi, K., Kajimoto, O.
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-08-2007
Subjects:	Activation energy Allyl phenyl ether Binomial pulse sequence Claisen rearrangement Flow mixing Flow-NMR Proton signal suppression Rate constant Subcritical water Supercritical water Allyl phenyl ether Subcritical water Supercritical water Binomial pulse sequence Flow-NMR Claisen rearrangement Rate constant Proton signal suppression Flow mixing Activation energy
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	Rate constants of Claisen rearrangement of allyl phenyl ether in subcritical water (272–306 °C) at 25.4 MPa were determined. The activation energy in this temperature range was evaluated to be 106 ± 5 kJ mol −1. To study the kinetics of reactions occurring in water at pressures up to 40 MPa and temperatures up to 400 °C, we developed a flow-through high-temperature and high-pressure NMR probe equipped with a mixing port above the RF detector. To suppress the large 1H signal of H 2O, the binomial sequence pulse technique was applied.
ISSN:	0896-8446 1872-8162
DOI:	10.1016/j.supflu.2007.01.003