Ionization energies of selenophen, tellurophen and some of their derivatives

✍ Scribed by G. Distefano; S. Pignataro; G. Innorta; F. Fringuelli; G. Marino; A. Taticchi

• Publisher: Elsevier Science
• Year: 1973
• Tongue: English
• Weight: 392 KB
• Volume: 22
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(73)80551-2

✦ Synopsis

The ionizaiion energies ofselenophcn.

tcllurophen and a number of derivatives have been determined by the clectron impact tcchniquc. Comp;jrison of the values obtained for tellurophen with those referring to the other 5-membered rings reveals twcj major diffcrcnccs: (1) the IP of the onsubstituted tcllurophcn is significantly Ioaer than thnt of its congencrs; (2) the sensitivity to substitucnt effects is much smaller. The peculiar behaviour of tellurophen with respect to rhc other congcncr systems can be esplaincd by admitting that B different molecular orbital is involved in the first ionization process of this ring. This is confirmed by photoelectron spectroscopy measurements.