Rodger, Alison2026-01-022026-01-020002-7863ORCID:/0000-0002-7111-3024/work/162949298https://hdl.handle.net/1885/733803234: The circular dichroism (CD) spectra of the first two Rydberg transitions of alkyl-substituted oxiranes are interpreted by an independent systems/perturbation approach. When alkyloxirane compounds are treated as an achiral oxirane ring perturbed by alkyl substituents, quantitative relationships between CD and oxirane structure are obtained. The dipolar coupled-oscillator model of Kirkwood and Kuhn proves to be the only significant mechanism for both the n(0) → 3s and n(0) → 3p transitions. The static coupling model suggested by Gedanken et al. to account for the sign of the n(0) → 3s transition does not account for the variation in CD magnitudes that is observed.5en198810.1021/ja00226a00233746010458