... nZaD 1.4750. (8) Clapp, THIS JOURNAL, TO, 184 (1948). (9) Melting points corrected: analyses by Micro-Tech labora- tories and Mrs. G. Sauvage. (IO) Prepared from both a-bromoisobutyryl chloride and iso- butyronitrile according to the procedures of Stevens (THIS JOURNAL, 70, 165 (1948)). Page 4. 2660 D. STANLEY TARBELL AND PAUL NOBLE, JR. Vol. 72 57%) was obtained with bp 157-163". sample had bp 160.5", n2b 1.4038. ...