Organometallic Reactions in Supercritical Fluids 


The miscibility of permanent gases with supercritical fluids is a key advantage for organometallic chemistry. It has enabled us to generate a whole series of new dihydrogen and dinitrogen complexes which would be difficult if not impossible to prepare in conventional solvents.

Chemical Scheme

Organometallic Synthesis in a Flow Reactor

The reactions in the scheme were carried out on a small scale in a spectroscopic cell. Supercritical flow reactors have allowed us to scale up some of the reactions to 50 - 100 mg scale. For example, we have been able to isolate the first dihydrogen compound of manganese.

Synthesis in a Flow Reactor

The supercritical fluid plays several roles:

Diagram of Apparatus

Spectroscopic monitoring is a key feature of this reactor. The FT-Raman allows the concentation of H2 to be monitored. While the FT-IR allows the conversion of reactant to product to be maximised by adjustment of the reactor parameters (flow rate etc).

Recently, we have used our flow reactor techniques to generate and characterise several other unstable compounds, such as N2O complexes and propene complexes.

N2O Complexes

Further Information

For further information please contact M. Poliakoff

Key Publications

University of Nottingham Welcome page

Inorganic Chemistry Welcome page

The Clean Technology Research Group Welcome page

Page created by: Simon Poliakoff



Created: July 1997
Last Revised: January 2001