The Molecular Zeeman Effect in Selenophene

Abstract

Abstract The molecular Zeeman effect in the rotational spectrum of selenophene has been observed. The molecular g-values and the magnetic susceptibility anisotropics for selenophene 80 Se are: g aa = -0.0849±0.0012, g bb = -0.0428±0.0011, g cc = + 0.365 ±0.0010, 2 X aa -X cc =50.15±0.80, 2 X bb -X cc -Z aa = 51.83 ± 1.3. From the comparison of the value ⊿ X =2 X cc -X aa -X bb in furan, thiophene and selenophene we conclude that the aromaticities of these molecules would be in the order: furan < thiophene ≌ selenophene.