The dissociation constants of cyanohydrins of some substituted thian-4-ones and thian-4-one 1,1-dioxides have been determined at 25° in 80% dioxan. The polymethyl thian-4-one cyanohydrins and r-2,t-6-diphenyl-c-3-alkylthian-4-ones show increasing instability owing to the effect of axial crowding.
P. Nanjappan, N. Satyamurthy and K. Ramalingam, J. Chem. Soc., Perkin Trans. 2, 1980, 714 DOI: 10.1039/P29800000714
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