NMR and IR Studies of Activation of Small Molecules by Organometallic Complexes
Lead Research Organisation:
University of Nottingham
Department Name: Sch of Chemistry
Abstract
Most chemical reactions proceed through a series of stages, some fast and some slow. En route, there are often highly reactive species that may last a small fraction of a second at room temperature. The nature and reactivity of these species is often key to determining the final outcome of the chemical reaction. Furthermore, these short-lived species are molecules of fundamental interest in their own right which often cannot be studied by conventional techniques. Photochemical reactions can occur at low temperatures and can be initiated by lasers and this provides a very convenient method for generating highly reactive complexes. In this proposal, we will develop a new approach combining advanced spectroscopic techniques. We will irradiate samples with a laser inside the probe of a state-of-the-art nuclear magnetic resonance (NMR) spectrometer at low temperatures, so allowing us to determine the structures of new reactive molecules. In order to achieve this, we require our new complexes to be stable for a few seconds and we will use fast infrared spectroscopic measurements in order to determine the best conditions to allow these measurements. This combination of technologies exploits the latest instrumentation in a way that has never been done before. Our chemical targets will be (a) complexes of metals with carbon dioxide, important intermediates for understanding how to mitigate greenhouse gases, (b) complexes of hydrocarbons with metals, important intermediates for understanding how to convert methane to valuable products catalytically, (c) reactions of simple silicon and nitrogen compounds at transition metals, concentrating on processes in which bonds to hydrogen are broken because of their importance in catalysis; (d) complexes of transition metals with the noble gas, xenon, because of the fundamental importance of this unreactive gas.
Organisations
People |
ORCID iD |
Mike George (Principal Investigator) |
Publications
Calladine J
(2010)
Photoinduced N2 loss as a route to long-lived organometallic alkane complexes: A time-resolved IR and NMR study
in Chemical Science
Calladine J
(2009)
Recent advances in organometallic alkane and noble gas complexes
in Pure and Applied Chemistry
Duckett SB
(2009)
A systematic approach to the generation of long-lived metal alkane complexes: combined IR and NMR study of (Tp)Re(CO)2(cyclopentane).
in Chemical communications (Cambridge, England)
N/a Andreas
(2010)
2,5-Bis(p-R-arylethynyl)rho following photolysis of (eta(5)-C4H4Se)Cr(CO)(3). A picosecond and nanosecond time-resolved infrared, matrix isolation, an
in Angewandte Chemie International Edition
Torres O
(2015)
Detection of s-alkane complexes of manganese by NMR and IR spectroscopy in solution: (?5-C5H5)Mn(CO)2(ethane) and (?5-C5H5)Mn(CO)2(isopentane).
in Chemical science
Description | This grant studied reactive intermediates by a combination of fast IR and NMR spectroscopies and made major academic advances on how we understanding on these important class of molecules. |
Exploitation Route | This grant opened up the area of studying organometallic alkanes by NMR |
Sectors | Chemicals |
Description | These work is being used to guide future academic studies in this area part of which relate to catalysis. |
Sector | Chemicals |
Description | RCUK Research Complex |
Amount | £1,491,903 (GBP) |
Funding ID | EP/I01974X/1 |
Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
Sector | Public |
Country | United Kingdom |
Start | 03/2011 |
End | 02/2016 |