SEARCH Articles Figures Tables CNDO/S-CI calculation CNDO/S-CI method Ci s-trans-Isomerization Cis- s. Geospecificity Cis- s. Isomers, Rearrangement Hanssen’s Ci»-acid INDO/S-CI method INDO/S-CIS Rearrangement of s-cis-Butadiene to Bicyclobutane S-Cis conformation S-cis configuration S-cis conformers S-cis rotamers S-cis-butadiene S-cis—conformer