4421. Gibbs Reagent
Nomenclature
CAS number: 101-38-2
2,6-Dichloro-4-(chloroimino)-2,5-cyclohexadien-1-one; 2,6-dichloro-p-benzoquinone-4-chloroimine; N,2,6-trichloro-p-quinoneimine; 2,6-dichloroquinone chloroimide; N,2,6-trichloroquinoneimine; N,2,6-trichlorobenzoquinone imine. C6H2Cl3NO; mol wt 210.45.
C 34.24%, H 0.96%, Cl 50.54%, N 6.66%, O 7.60%.
Description and references
Reagent used to determine the presence of phenols. The reaction with phenols unsubstituted in the para position is called the Gibbs Reaction: H. D. Gibbs, Chem. Rev. 3, 291 (1927). Prepn of the reagent: idem, J. Biol. Chem. 72, 649 (1927); G. I. Mikhailov, Trans. Inst. Pure Chem. Reagents 16, 83 (1939). Analysis of the Gibbs color reaction: J. C. Dacre, Anal. Chem. 43, 589 (1971).
