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Complex formation of gel-forming β-1,3-d-glucan (‾DPn = 500) with congored in alkaline solution was studied by measurements of visible absorption spectra. Molecular absorption coefficient of the complex at 520 nm was determined to be 2.98×104 per congored and formation constant of the complex, 6.4×105 M−1, in 0.1 N sodium hydroxide solution at 25°C.

By reexamination of the reaction of benzyl hydrodisulfide with potassium hydroxide another mechanism has proved favorable, that involving proton abstraction followed by elimination of the hydrodisulfide ion. When a decreased amount of potassium hydroxide was added to the hydrodisulfide, a mixture of benzyl polysulfides was formed, the formation of which is attributed to hydropolysulfide ion. Nucleophilic attack by cyanide ion appears to proceed competitively with alkaline decomposition in the reaction of benzyl hydrodisulfide with potassium cyanide in aqueous dioxane. The formation of polysulfides in this case is also discussed.

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