Untersuchungen an molekülkomplexen von n-σ-TYP MITT. I. über freie enthalpie—kraftkonstantenkorrelationen von molekülkomplexen des jods m

Abstract

Linear correlations have been found between the ΔG 0 values of the molecular complexes R 1R 2R 3PO/I 2, R 1R 2SO/I 2 and R 1R 2SeO/I 2 and the PO, SO and SeO valence force constants, respectively. The nature of the correlation is determined by the ZO donor bond and not by the donor atom, where Z is P, S or Se. The change on ΔG 0 values for an equal change in the ZO valence force constants increases in the order R 1R 2SO/I 2⪡R 1R 2R 3PO/I 2 < R 1 R 2SeO/I 2. Seleninyl complexes with I 2 are more stable than the analogous thionyl complexes. From ΔG 0— f zo correlation deductions can be made about the nature of the ZO donor bond and ΔG 0 values can be evaluated from vibrational spectra. A linear correlation exists between the ΔG 0 values of corresponding thionyl and seleninyl complexes which is of the same form as the correlation between the valence force constants of analogous thionyl and seleninyl compounds.