Title

Homogeneous Hydrogenation of Norbornadiene with Parahydrogen and Phosphonic Ester Phosphine Rhodium Complexes Studied by in situ NMR Spectroscopy

Abstract

Homogeneous hydrogenation of norbornadiene with enriched parahydrogen (p-H2) and phosphonic ester phosphine rhodium complexes is detected using in situ NMR spectroscopy The obtained polarization spectra remain unchanged during the catalysis in thf-d8 as a solvent but change with time when the hydrogenation is executed in acetone-d6. The observed phenomenon is attributed to a change of the phase correlation of the transferred parahydrogen nuclei via nuclear singlet-triplet (S/T0) mixing during the reaction. Simultaneously, 31P NMR spectra change indicating a change in the nature of the original rhodium complex when the hydrogenation is carried out in acetone-d6.

Department(s)

Chemistry

International Standard Serial Number (ISSN)

00404020

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1995 Elsevier, All rights reserved.


Share

 
COinS