SEARCH Articles Figures Tables All-trans planar zigzag conformation Circular dichroism planar conformation Conformation and planar chirality Conformation and planar chirality pillar arenes Conformation near-planar Conformations planar trans Planar bridge conformation Planar conformation calculations Planar conformation cyclopropane Planar conformation ground electronic state Planar conformation of cyclopentane Planar zig-zag conformations Planar zigzag conformation Trans-planar zigzag conformation