林静 6 Bonds are equatorial Equatorial bonds lie along the equator
6 Bonds are equatorial Equatorial bonds lie along the equator Equatorial bonds lie along the equator
衣林 Conformational Inversion 十十 chair-chair interconversion(ring-flipping) rapid process (activation energy 45 kJ/mol) all axial bonds become equatorial and vice versa
Conformational Inversion chair -chair inter conversion onversion (ring -flipping) flipping) rapid process (activation energy = 45 kJ/mol) rapid process (activation energy = 45 kJ/mol) all axial bonds become equatorial and vice versa all axial bonds become equatorial and vice versa
Boat Conformer a “flagpole"hydrogens H H H H boat conformation symmetrical boat eclipsed H H H CH- H H H HH Newman projection “"twist”boat
Boat Conformer =>
Half- chair Skew boat 扭船式 45 45 kJ/mol kJ/mol 23 kJ/mol
45 kJ/mol 45 kJ/mol 23 kJ/mol Skew boat 扭船式 Halfchair
Conformational Energy half-chair half-chair 10kcal KB.Iou3 (42kJ /5.5 kcal 6.9 kcal twist (23kJ (29kJ 2 chair chair
Conformational Energy =>