boron has been researched along with potassium-hydroxide* in 1 studies
1 other study(ies) available for boron and potassium-hydroxide
Article | Year |
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meso-Hydroxysubporphyrins: A Cyclic Trimeric Assembly and a Stable meso-Oxy Radical.
Treatment of meso-chlorosubporphyrin with potassium hydroxide in DMSO followed by aqueous work up and recrystallization gave a cyclic trimer consisting of meso-hydroxysubporphyrin units linked between the central boron atoms and meso-hydroxy groups. Solutions of this trimer are nonfluorescent, but become fluorescent when exposed to acid or base, since hydrolytic cleavage of the axial B-O bonds generates the meso-hydroxysubporphyrin monomer or its oxyanion. Ring cleavage of the trimer was also effected by reaction with phenylmagnesium bromide to produce meso-hydroxy-B-phenyl subporphyrin, which can be quantitatively oxidized with PbO2 to furnish a subporphyrin meso-oxy radical as a remarkably stable species as a result of spin delocalization over almost the entire molecule. Topics: Boron; Crystallography, X-Ray; Dimethyl Sulfoxide; Free Radicals; Hydroxides; Lead; Molecular Conformation; Oxides; Porphyrins; Potassium Compounds; Spectrophotometry, Ultraviolet | 2015 |