Interaction between iodonium and silver cation was demonstrated for the first time
It is well known and intuitive that iodide (I–) has a strong affinity for Ag+. For instance, AgI is one of the most insoluble inorganic salts due to the strength of their attractive electrostatic force. In fact, it is used to generate artificial rain (cloud seeding) because the crystalline structure of AgI is similar to that of ice (ideal nucleation agent).
However, the strong and counter-intuitive affinity of iodonium (I+) for Ag+ was not known until now. An international research group have succeeded in preparing and characterising a supramolecular complex where I+ and Ag+ are in close contact, thus overcoming the intrinsic electrostatic repulsion of their positive charges. Remarkably, the I+···´¡²µ+ interaction was demonstrated both in the solid state and in solution.
"The explanation provided is that the iodine atom, even as a positively charged cation, is able to generously donate electrons from its free electron lone pairs to the Ag+. Therefore, no matter the electronic nature of iodine, rich or poor, it seems its generosity toward the Ag+ is boundless", says Professor Kari Rissanen from Ä¢¹½Ö±²¥.
The research group included Dr. Shilin Yu, M.Sc. Parveen Kumar, Dr. Jas S. Ward and Professor Kari Rissanen from Ä¢¹½Ö±²¥ and Prof. Antonio Frontera from at the University of the Balearic Islands.
Link to publication in Chem-journal:
For further information:
Professor Kari Rissanen, Ä¢¹½Ö±²¥, tel. +358 50 5623 721, kari.t.rissanen@jyu.fi
Professor Antonio Frontera, University of the Balearic Islands, tel. +34 971 173262, toni.frontera@uib.es
The Faculty of Mathematics and Science
Communications Specialist Tanja Heikkinen, tanja.s.heikkinen@jyu.fi, +358 50 472 1162
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