Add time:09/02/2019         Source:sciencedirect.com

Five substituted pyridinium tetrachlorocuprate(II) salts have been prepared and characterized. Infrared studies clearly indicate a substantial interaction between the chloro ligands and the pyridinium hydrogens as well as substituent amine hydrogens. Electronic and electron spin resonance spectra both indicate similar distortion from planar (or tetrahedral) symmetry for all five salts. A fit of D2d energy levels with the three possible d–d absorption bands shows that the angle of distortion is between 65 and 67 degrees.

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