Abstract
Reductive activation of O(2) by H(2) with rhodium terpyridine complexes in H(2)O and CH(3)CN is described and the mechanism is fully elucidated. The rhodium complex extracts electrons from H(2) and reductively activates O(2) to form a peroxo active intermediate. This intermediate is able to oxidise triphenyl phosphine to triphenyl phosphine oxide. A model system constructed in CH(3)CN provides isolable analogues of catalytic intermediates in H(2)O, allowing a detailed look at each step in the catalytic cycle.
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