Synthesis of Chromium (III) Phthalate via Chromium (VI) Oxide using Tertiary Amyl Alcohol

Two chromium Complexes [CrO2 (C8H5O4) (H2O) 3] and [CrO2 (C8H5O4) (H2O) 3]. H2O was prepared by reduction of CrO3 at room temperature by ethanol in the presence of phthalic acid (H2pht) yield solution that contains monomeric and dimeric Cr (III) complexes. A solution H2pht/Cr molar ratio of 1:1 and 1:2 is indefinitely stable towards precipitation. Their analysis was done by using elemental (C and H), ICP-OES (for Cr %), UV-Vis, FTIR, 1HNMR, and Fast Atomic Bombardment (FAB) Mass spectrometry, whereas DSC investigated thermal behavior. Results showed that the complexes formed were probably monomeric. It was noted that changing the reaction condition, only slowed down the reaction, and rate of formation of complexes, not the nature of products. The kinetics and the lability of complexes could be predicted from the DSC.