Stereoisomerism:A form of isomerism where molecules have the same molecular formula and sequence of bonded atoms but differ in the three-dimensional orientations of their atoms in space.
Torsional strain:The resistance to the rotation about a bond due to repulsion between electrons in nonbonded atoms that are close together, affecting the stability and energy of conformations.
Newman projection:A method for visualizing the spatial arrangement of atoms in a molecule by looking straight down the bond connecting two carbon atoms, used to assess different conformational isomers