C. Hennig et al., INFLUENCE OF SUBSTITUENTS ON THE N K X-RAY-ABSORPTION NEAR-EDGE STRUCTURE OF PYRROLE DERIVATIVES, SPECT ACT A, 52(9), 1996, pp. 1079-1083
The X-ray absorption and electron yield spectra of monomeric pyrrole i
ncluding derivatives with different substituents, thiazole and oxazole
have been investigated. Inductive and mesomeric effects on the spectr
al features are discussed. Inductive effects create energy shifts of t
he pi resonances; mesomeric effects cause a splitting and energy shif
ts of the pi resonances.