“…Confirmation of structure was obtained from the nmr spectrum (values in ppm, downfield from TMS) in CDCI3, which shows two peaks of equal intensity, at 4.22 ppm (CH2) (calculated for (8) Melting points were observed in open glass capillary tubes in a stirred silicone bath, and the readings are corrected. Elemental analyses were performed at the Department of Chemistry, University of Virginia, Charlottesville, Va., except the analysis of 3,4,5-triiodobenzyl bromide, which was^performed by Galbraith Laboratories, Inc., Knoxville, Tenn.…”