Abstract
AbstractThe CH2 stretching and bending frequencies have been studied with good resolving power in O‐ and S‐ heterocyclic saturated molecules. Sulfur has a marked lowering effect (∼ 40 cm–1) on the bending frequency of neighbour CH2 groups. This vibration is not significantly altered by the vicinity of one oxygen atom; it is shifted towards higher frequencies, however, in the group.The behaviour of the stretching frequencies is not well understood but here also, perturbations by sulfur are observed. Previous work and conclusions of Pozefsky and Coggeshall are briefly discussed.