The CNDO/2 studies on the electronic spectra of the isomiric thienothiophenes

✍ Scribed by A. Tajiri; T. Asano; T. Nakajima

• Book ID: 104238791
• Publisher: Elsevier Science
• Year: 1971
• Tongue: French
• Weight: 191 KB
• Volume: 12
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(01)87461-x

✦ Synopsis

Only recently has been completed the synthesis of the series of the three possible isomeric thienothiophenes, thieno[4,5_b]thiophene II, thieno[2,3-b]thiophene III and thieno[3,4_b]thiophene IV (Fig.l), with an appearance of the report on the isolation of the most unstable isomer of the above three, IV, by