- Conference date: Sep 1993
- Location: Mont Sainte‐Odile, France
Interactions between metal atoms or ions and unsaturated organic molecules in the interstellar or circumstellar media could play an important role in the chemistry of these media.
Ab‐initio calculations were performed to predict bonding energy of the cations [metal‐benzene]+ and [Mg‐pyrene]+. We showed that the higher bonding energy of [metal‐benzene]+ is, the larger is the metal depletion. This result should be extended to bigger PAHs. We conclude that organometallic chemistry can participate to the depletion of metals.
We synthetized grains composed of small cristallized cores of metal (diameter from 20Å to 200Å) embedded in pyrene. The mean diameter of grains depends of the ratio pyrene/metal.
Finally, we showed that organometallic reactions can be catalytic. Large organic molecules could be synthetized faster in the ISM through such this process than through classical collisions. We propose that the first ring of PAH molecules could be synthetised in this way.
- Organometallic compounds
- Polycyclic aromatic hydrocarbons
- Associative substitution
- Interstellar medium
Daniel Baumann, Mark G. Jackson, Peter Adshead, Alexandre Amblard, Amjad Ashoorioon, Nicola Bartolo, Rachel Bean, Maria Beltrán, Francesco de Bernardis, Simeon Bird, Xingang Chen, Daniel J. H. Chung, Loris Colombo, Asantha Cooray, Paolo Creminelli, Scott Dodelson, Joanna Dunkley, Cora Dvorkin, Richard Easther, Fabio Finelli, Raphael Flauger, Mark P. Hertzberg, Katherine Jones‐Smith, Shamit Kachru, Kenji Kadota, Justin Khoury, William H. Kinney, Eiichiro Komatsu, Lawrence M. Krauss, Julien Lesgourgues, Andrew Liddle, Michele Liguori, Eugene Lim, Andrei Linde, Sabino Matarrese, Harsh Mathur, Liam McAllister, Alessandro Melchiorri, Alberto Nicolis, Luca Pagano, Hiranya V. Peiris, Marco Peloso, Levon Pogosian, Elena Pierpaoli, Antonio Riotto, Uroš Seljak, Leonardo Senatore, Sarah Shandera, Eva Silverstein, Tristan Smith, Pascal Vaudrevange, Licia Verde, Ben Wandelt, David Wands, Scott Watson, Mark Wyman, Amit Yadav, Wessel Valkenburg and Matias Zaldarriaga
Data & Media loading...
Article metrics loading...