Fyridine

P3nridazines, bis-quatemary salts of, 20 quatemization of, 19, 20 Pyridazine-thione, 51 Fyridines, activation energy of, 11 -alkylation of, 227 alkyl-, reaction with carbenes, 76-78 amino-, 224, 226 aza-effects in, 318 

P. Walden has studied soln. of iodine in acetaldehyde, hydrazine hydrate, and acetonitrile J. H. Mathews, soln. of iodine in fyridine, ethyl, allyl, and phenyl isothiocyanic esters, and phenyl isocyanate while H. A. Allen has studied soln. of bromine and iodine in various oils. 

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