Pyrolysis of I at 250-2iC5O gave only half of the theoretical volume of gas, assuming that one mole of carbon dioxide should be evolved. Neither of the two products isolated were the result of a rearrangement of the Claisen type; one was 3, 5-dichlorothiosalicylic acid (111), and the other, from its composi-(1 j Abbott Laboratories fell on^, 19.51-1932.(2) Recent papers in this series.(a) DS Tarbell and RI. A. hfc-Call, THIS JOURNAL, 74, 49 (19.52);(b) ...