Highly twisted substituted arenes: X-ray structure and dynamic 1H NMR spectra of 1,4-dialkyl-2,3,5,6-tetrakis(alkylsulfonyl)benzenes
Abstract
The sulfonyl groups around 1,4-disubstituted-2,3,5,6-tetrakis(alkylsulfonyl)benzenes adopt an alternating orientation and the ring is highly twisted, with external torsion angles (S–Car–Car–S) of 46° and internal torsion angles (Car–Car–Car–Car) Of 23°.