77Se n.m.r. studies of organoselenium compounds: III—substituent effects in 4,4′-disubstituted diphenyl selenides and 4,4′-disubstituted diphenylmethanes studied by 1H, 13C and 77Se spectroscopy

✍ Scribed by S. Gronowitz; A. Konar; A.-B. Hörnfeldt

• Publisher: John Wiley and Sons
• Year: 1977
• Tongue: English
• Weight: 460 KB
• Volume: 9
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.1270090408

✦ Synopsis

Abstract

^77^Se N.m.r. spectra of 4,4′‐disubstituted diphenyl selenides have been obtained. The chemical shifts could be correlated with substituent constants of the Hammett type or with Swain and Lupton two‐parameter equations. No correlations were observed between these ^77^Se shifts and the ^13^C shifts of the CH~2~ group of 4,4′‐disubstituted diphenylmethanes, the latter shifts showing no correlation with substituent constants. On the other hand linear correlation was observed between the ^77^Se shifts of the 4,4′‐disubstituted diphenyl selenides and the ^1^H shifts of the CH~2~ group of the diphenylmethanes, the ^13^C shifts of their 1‐carbons and the ^19^F shifts of 4‐substituted fluorobenzenes.