Microwave spectrum of 3-nitrothiophene

✍ Scribed by M.K. Isvén; W.M. Ralowski; S.O. Liunggren

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 468 KB
• Volume: 47
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(77)80022-5

✦ Synopsis

The microwave spectrum of 3-nitrothiophene has been studied in the frequency region 26.5-40.0 GHz. The rotational transitions of the ground state and the fist sb. torsionally excited states have been assigned. The ground state rotational constants have been determined to be Ao =4622.61 -F 0.07 MHr,Bo = 1231.751 r 0.001 MHz and CO = 973.062 2 0.001 MHz. 7Tre planarity of the molecule has been demonstrated. The fist torsional frequency and the barrier to internal rotation of the nitro group have been estimated as 60 ti' and 3.8 kcal/mole, respectively.