KEY STRUCTURAL FEATURES IN ELECTROCHEMISTRY OF Cr(0) AND Fe(0) AMINOCARBENE COMPLEXES

0361580 - ÚFCH JH 2012 RIV SK eng C - Konferenční příspěvek (zahraniční konf.)
Hoskovcová, I. - Dvořák, D. - Tobrman, T. - Záliš, Stanislav - Ludvík, Jiří
KEY STRUCTURAL FEATURES IN ELECTROCHEMISTRY OF Cr(0) AND Fe(0) AMINOCARBENE COMPLEXES.
New Trends in Coordination, Bioinorganic and Applied Inorganic Chemistry. Bratislava: Slovak University of Technology, 2011 - (Melník, M.; Segĺa, P.; Tatarko, M.), s. 155-169. ISBN 978-80-227-3509-4.
[International Conference on Coordination and Bioinorganic Chemistry /23./. Smolenice (SK), 05.06.2011-10.06.2011]
Grant CEP: GA AV ČR IAA400400813
Výzkumný záměr: CEZ:AV0Z40400503
Klíčová slova: electrochemistry * aminocarbene complexes
Kód oboru RIV: CG - Elektrochemie

In our study, we have electrochemically investigated oxidation and reduction of about 40 chelated and non-chelated aminocarbene complexes of chromium (n=5) and iron (n=4) where R stands for p-substituted benzene ring or a heterocycle. Eox and Ered values were treated by the Linear Free Energy Relationship (LFER) approach to find the type of structural modifications responsible for their changes. Potential of oxidation depends on the nature of the central metal atom and on the presence of pi-accepting ligands. Eox of the Cr complexes reflects only the number of CO ligands. Behaviour of the Fe compounds, with lower coordination number and shorter M – L bonds, shows that the eta2-bonded allyl group and the carbene double bond also act as important pi-acceptors. Ered is governed mainly by substitution of the carbene carbon atom and it is sensitive to the presence of a pi-conjugated electron system.
Trvalý link: http://hdl.handle.net/11104/0198866