“…The perchlorate complexes, in addition to the heterocycle peaks, showed additonal peaks due to the perchlorate group. The complex [Co(OClO 3 ) 2 (L) 1 13 The spectral features are characteristic of coordination of one of the perchlorate groups to Cu(II), the other being outside the coordination sphere. 5 The far-IR spectra of the chloro complexes displayed peaks due to terminal M-Cl and M-N (M = Co, Ni or Cu) around 315 and 278 cm -1 respectively.…”