Effective conformations have been established for the o,o'- and m,m'-disubstituted diaryl disulfides and diselenides. Angles of aryl group rotation relative to the C-E-E plane have been determined for these compounds. One ...

1. We have made observations on the electron paramagnetic resonance of the free radical triphenylphenoxyl. 2. For di-(2,4,6-triphenyl)phenyl diselenide, synthesized for the first time, no dissociation into free radicals ...

1. The axes of the polarizability ellipoids of the Csp-S and Csp-Se bonds were determined. 2. The steric structure of a number of acetylenic thio- and selenoethers p-XC6H4E-C≡CC6H5 was studied. The benzene ring attached ...

The reaction of selenium with phenylacetylene in the presence of sodium ethoxide in boiling dioxane has given 2, 5-diphenyl-1, 4-diselenacyclohexa-2, 5-diene, whose molecules have the boat conformation. © 1970 The Faraday ...