Mercaptans sulfonamides

Class Ai. Compounds insoluble in water and in dilute sodium bicarbonate, but soluble in dilute sodium hydroxide solution. Weakly acidic compounds belong in this class. Weakly acidic properties are usually exhibited by oximes, imides, amino acids, sulfonamides of primary amines, primary and secondary nitro compounds, enols and phenols. Certain mercaptans also are weak acids. 

Class M. Neutral compounds, insoluble in water, which contain elements other than C, H, O, and the halogens. Nitro compounds, amides, negativeiy substituted amines, nitriles, azo compounds, hydrazo compounds, sulfones, sulfonamides derived from secondary amines, mercaptans, thio ethers, and many less common types of compounds are classified in the miscellaneous group. 

The SO2 and SO groups of sulfur compounds produce sbong infrared bands in the 1400-1000 cm range. The expected S=0 stretching bands for sulfoxides, sulfones, sulfonic acids, sulfonamides, sulfonyl chlorides and sulfonates are given in Table 4.11. The other bonds involving sulfur, such as S-H, S-S and C-S, produce weaker infrared bands. Compounds, such as sulfides and mercaptans. 

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