Examination of the RatioDv/Hvfor Infrared Bands Assigned to the C-H(D) and Ring Vibrations in Metal Complexes of Quinoline, Pyridine, Aniline and Their Fully-Deuterated Analogues

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Abstract
The infrared spectra of sixteen metal complexes comprising the ligands quinoline, pyridine, aniline and their fully-deuterated analogues have been examined in order to determine the ratio D v/H v for bands assigned to the C-H and ring modes of the heterocyclic or aromatic ring. With very few exceptions, D v/H v falls within the ranges 0.68 to 0.85 for C-H vibrations and 0.85 to 1.00 for ring modes. The ranges are narrower for complexes of a specific amine. The potential usefulness of the results is discussed.