Journal
ORGANIC LETTERS
Volume 5, Issue 14, Pages 2421-2424Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol034581j
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- NIGMS NIH HHS [GM 47274] Funding Source: Medline
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graphic A library of hanging porphyrin xanthene (HPX) compounds containing pendant groups with various proton-donating abilities (pK(a) ranging from similar to2 to 25) has been synthesized. Their corresponding chloroiron(III) complexes promote the catalase-like disproportionation of hydrogen peroxide. The overall activity and turnover numbers (TONs) are maximal for iron HPX complexes bearing acidic hydrogen-bond pendants. These results establish that careful control of intramolecular proton inventory can dramatically influence the catalytic activation of O-O bonds.
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