Relative Configuration Resolution Restricted Rotation See free rotation, hindered rotation, restricted rotation . Retention of configuration See Walden inversion. Rosanoff Convention See Fischer-Rosanoff convention. Rotamer Rotational Barrier Rotatory Power RS See racemate . Secondary Structure Si See Re, Si.
Sequence Rules See priority .
Skew See torsion angle and chair, boat, twist. Space Formula Spontaneous Resolution See racemic conglomerate . SR See racemate . Stereoconvergence Stereodescriptor Stereoelectronic Stereoelectronic Control Stereoformula See projection formula. Stereoheterotopic Stereoisomerism Stereoisomerism, Planar See planar chirality .