The complex formation between Cr(III) and morin was carried out in methanol and confirmed by analytical characterization using UV-Vis, IR, (1)H NMR, and TG-DTA. UV-Vis shows significant bathochromic shift in benzoyl upon coordination as well as IR well illustrates the peak shift of C=O group and formation of a O-Cr(III) bond. Likewise, (1)H NMR studies clarify that Cr(III) metal ion replaces th...

We report the generation and spectroscopic characterization of a heterobimetallic [(TMC)Fe(III)-O-Cr(III)(OTf)4] species (1) by bubbling O2 into a mixture of Fe(TMC)(OTf)2 and Cr(OTf)2 in NCCH3. Complex 1 also formed quantitatively by adding Cr(OTf)2 to [Fe(IV)(O)(TMC)(NCCH3)](2+). The proposed O2 activation mechanism involves the trapping of a Cr-O2 adduct by Fe(TMC)(OTf)2.

In the present study, a new complex Cr(III)-quinic was synthesized. The new species was characterized by elemental analysis, spectroscopic, structural, thermal, EPR and magnetic susceptibility studies. Detailed aqueous speciation studies in the Cr(III)-quinic system suggest the presence of a number of species with distinct structural properties related to the ones encountered in the synthetic c...

A simultaneous extraction of Cr3+ and Cr6+ species in aqueous solution was developed. The extraction behaviors of ammonium pyrrolidinedithiocarbamate (APDC) for both Cr6+ and Cr3+ are carefully discussed in this report. X-ray diffraction and spectroscopic studies indicate that Cr6+ reacts with the ammonium pyrrolidinedithiocarbamate ligand to form two products, Cr(PDC)2(OPDC) and Cr(PDC)3, wher...

The title compound, [CrNa(C(16)H(9)ClN(2)O(2))(2)(C(3)H(6)O)(2)](n), is an azo-Cr(III) complex polymer that is used as a charge-control agent in electrophotography. The monomeric unit is composed of octa-hedral Cr(III) and Na(I) units, and is characterized by twofold rotation symmetry. The Cr(III) atom is chelated by two N and four O atoms from two [(5-chloro-2-oxidophen-yl)diazen-yl]-2-naphtho...