eins, and Kinetic Measurements of Thiol pKa Values", Shaked, Z., Szajewski, R. P. and Whitesides, G. M., Biochemistry, 1980, 19, 4156-4166. 116. "Trappings of Free Alkyl Radical Intermediates in the Reaction of Alkyl Bromides with Magnesium", Lawrence, L. M. and Whitesides, G. M., J. Am. Chem. Soc., 1980, 102, 2493.2494. 115. "Reactions