Abstract
A complete assignment of the infrared spectra of the title macrocycles was carried out on the basis of well-documented references and a normal coordinate analysis based on a simplified molecular model. The structure of the complexes has been inferred from IR and UV–VIS data. Infrared reflection–absorption (IRRAS) spectra using a smooth copper surface and surface enhanced Raman spectra of samples dissolved in colloidal silver were registered. The non-planar structure of the coordination site and the sterical hindrance imposed by phenyl substituent fragments avoid any adsorbate–substrate interaction.
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