Conformational analysis of trans-2,6-dithiabicyclo[5.4.0]undecane-4-spiro-1′-cyclobutane, -cyclopentane, and -cyclohexane by 1H and 13C nuclear molecular resonance spectroscopy
Abstract
The high-field 1H and 13C d.n.m.r. spectra of the title compounds are presented. The coalescence effects in the spectra of spirocyclohexane derivatives are discussed and assigned to the conformational process, namely restricted pseudorotation of the dithiepane ring.