The mass spectrometry of substituted benzenesulfonylhydrazides (X.C6H4.SO2NHNH2) has been studied, with X = p‐CH3, H, p‐CH3O and p‐Br. The intensities of [XC6H4SO2]+ and [XC6H4]+ follow the Hammett relationship [In(Z/Z0) =ρδp+] with ρ of 0.375 and 2.37, respectively.
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Balza et al. (1974) studied this question.