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Noncovalent secondary interactions in Co(II)Salen complexes: O2 binding and catalytic activity in cyclohexene
Roberto Fiammengo1, Christiaan M Bruinink, Mercedes Crego-Calama
1Laboratory of Supramolecular Chemistry and Technology, MESA(+) Research Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
The Journal of Organic Chemistry
|November 26, 2002
Abstract:
The O2 affinity of Co(II)Salen complexes 1-4 and their reactivity in cyclohexene oxygenation reactions of Co(II)Salen complexes 1-4 are modulated by noncovalent interactions such as hydrogen bonding and steric hindrance using a functionalized diamino bridge. Higher O2 affinity is observed in the case of efficient hydrogen-bonding interactions (complex 1), while increased steric hindrance (cis vs trans diamino bridge) around the Co-coordinated O2 is influencing the reactivity of the complexes.