Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 132, Issue 47, Pages 16774-16776Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja109351h
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Funding
- NSF Center for Chemical Innovation [CHE-0947829]
- Arnold and Mabel Beckman Foundation
- CCSER (Gordon and Betty Moore Foundation)
- NSF
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0802907] Funding Source: National Science Foundation
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Proton transfer from the triplet excited state of brominated naphthol to a difluoroboryl bridged Co-I-diglyoxime complex, forming (CoH)-H-III, was monitored via transient absorption. The second-order rate constant for (CoH)-H-III formation is in the range (3.5-4.7) x 10(9) M-1 s(-1), with proton transfer coupled to excited-state deactivation of the photoacid. (CoH)-H-III is subsequently reduced by excess Co-I-diglyoxime in solution to produce (CoH)-H-II (k(red) = 9.2 x 10(6) M-1 s(-1)), which is then protonated to yield Co-II-diglyoxime and H-2.
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