FTIR study of the 2,2′-biquinoline complex of dichlorodioxochromium(VI): the CrO2 vibrations

Synthesis, Properties, and Structures of Chromium(VI) and Chromium(V) Complexes with Heterocyclic Nitrogen Ligands

“…-1 , and a strong feature at 251 cm -1 tentatively assigned as δ(CrO 2 ). These features are in reasonable agreement with predictions from DFT calculations, [22] if one applies the usual scaling factor of 0.9 to allow for the neglect of anharmonicity. -anion, which are six-coordinate, and show charge-transfer bands at ca.…”

FT-IR and Raman spectroscopic and quantum chemical studies of zinc halide complexes with 2,2′-biquinoline

“…In solid state, 2,2 0 -biquinoline molecule is known to be in trans coplanar configuration [21], however cis form occurs on formation of complexes with metal ions [6,7,11,12]. When no symmetry restrictions were imposed during the geometry optimizations, the minima located at molecular potential energy surface corresponded to C 1 symmetry for both complexes.…”

“…The IR spectroscopic studies on Zn(ClO 4 ) 2 [5], dichlorodioxochromium(VI) [6] and palladium, platinum and rhodium complexes of biq [7] were previously reported. In these studies, however, only some important vibrational modes of the ligand were given.…”

Fourier Transform Infrared Spectrophotometry Studies of Chromium Trioxide-Phthalic Acid Complexes

“…Cr/phthalic acid-TAA (Cr/H 2 pht-TAA) complex (S-2) show bands in the 974 and 1072 cm -1 region that can be assigned to Cr-O vibrations. The difference between the spectra of Cr/phthalic acid-water (Cr/H 2 pht-water) complex (S-1) and Cr/phthalic acid-TAA (Cr/H 2 pht-TAA) complex may be found in the 974-1072 cm -1 where the stretching bands of the Cr-O group are expected to appear [6][7] . Strong and medium bands appear in this region of the spectrum of the Cr/phthalic acid-TAA (Cr/H 2 pht-TAA) complex, whereas only weak bands are present in the same region of the spectrum of the Cr/phthalic acid-water (Cr/H 2 pht-water) complex.…”