A. Smetana, J. Haberman, T. Castorina
Apr 1, 1963
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Abstract
Abstract : Carbon-14 labeled tetramethylammonium bromide was prepared via the condensation of C-14 methyl bromide with trimethylamine using high vacuum techniques. Unrecrystallized product yields, in the range of 100% of theory (based on methyl bromide), are independent of variations in excess quantitites of trimethylamine. C-14 methyl bromide is effectively derived from an intermixture of C-14 methyl iodide with methyl bromide in the ratio of 1:350. A series of preparations from aliquots of the stock CH3I/CH3Br mixture result in reproducible yields and specific activities of 1.8% average deviation.