VII. Compounds with Sulfur–Hydrogen or Selenium–Hydrogen Bonds

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Page ID: 24672

Roger W. Binkley and Edith R. Binkley
Cleveland State University

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The rate constants for hydrogen-atom abstraction from sulfur–hydrogen and selenium–hydrogen bonds are so rapid [k_SH = 1.5 x 10⁸ M^-1s^-1 (from C₆H₅SH) and k_SeH = 2.1 x 10⁹ M^-1s^-1 (from C₆H₅SeH)] that abstraction typically will take place before other radical reactions (e.g., addition, cyclization, and rearrangement) can occur. (Rate constants for hydrogen-atom abstraction from various, hydrogen-atom donors, as well as rate constants for other radical reactions are given in Chapter 8 of Volume I.)

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