Table 3: Static and frequency-dependent (  a.u.) electronic polarizabilities (a.u.) and first-order hyperpolarizabilities (a.u.) of 2,2′-bithiophene rotamersa.

anti-gauche syn-gauche

( )130.46129.94
( )132.57 (140.15)131.97 (139.14)
( )81.7178.70
( )84.68 (96.33)81.43 (92.48)
( )48.7109.0
( )51.3116.1
( )54.7126.8

The calculations were performed at the HF/POL level on the MP2/6-311G** geometries. The values in parentheses refer to the frequency-dependent polarizabilities at  a.u..