VII. The crystal structures of some heterocydic organic compounds of analogous constitution.—<i>Part II</i>. Phenthiazine, phenoxthionine, phenoxselenine, and phenoxtellurine

Abstract

Summary An account is given of crystallographic, optical, and X-ray measurements on phenthiazine, phenoxthionine, phenoxselenine, and phenoxtellurine, with a preliminary discussion of possible crystal structures. Our thanks are due to Dr. N. M. Cullinane, of the Chemistry Department of this College, for specimens of phenoxthionine and phenthiazine; to Dr. H. D. K. Drew for specimens of phenoxselenine and phenoxtellurine; and to Dr. E. E. Turner for specimens of phenoxtellurine. We are also indebted to Dr. Kathieen Lonsdale for permission to include her measurements of diamagnetic susceptibilities which appear in Table IV.