The magnetic circular dichroism spectrum of acetylene

✍ Scribed by A. Gedanken; O. Schnepp

• Publisher: Elsevier Science
• Year: 1976
• Tongue: English
• Weight: 413 KB
• Volume: 37
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(76)80236-9

✦ Synopsis

The mngne:ic circular dichroism WCD) spectrum of _gs phase acetylene has been studied in the spectral region 220-140 m-11. No MCD signal was detected in the region of the first transition. The observation of irregular r(lcD bands beginning at 185 nm confirm assigment of this latter band as the O-O band of the second transition. The discrete and relatively narrow bands in the regon i55-140 nm exhibit pure /l-term character, lending unambiguous confirmation to the assignment of 'nu for the state. The observed absorption spectrum in this rqion is interpreted as consisting of two non-interacting systems, one involving Lhe 'llu Rydbcrp state and the other, a broad continuous back-ground, cannot be assigned. It is however sug=Tsted that it may be due to the 'Xi state of the 7 -. IT* excited contiguration.