engleski

The Rare Examples of Thiosemicarbazonato Chromium(III) Complexes : Crystal Structures of [Cr(Hsal 4-Metsc)2]ClxCH3OH and [Cr(Hsal 4-Phtsc)2]Cl

Reactions of salicylaldehyde 4- methylthiosemicarbazone (H2L1) and salicylaldehyde 4- phenylthiosemicarbazone (H2L2) with assorted chromium(III) precusors, [Cr(H2O)6]Cl3, [Cr(H2O)6](NO3)33H2O and [Cr(H2O)6](CH3COO)3, afforded new mononuclear chromium(III) complexes of the general formula [Cr(HL)2]X (X = Cl−, NO3 − and CH3COO−). In all isolated compounds, Cr(III) ion is coordinated by the O, N, S atoms of the two singly deprotonated thiosemicarbazonato ligands, which are present in the thione form. All complexes have been characterized in the solid-state by means of chemical analyses, TG analysis and IR spectroscopy. The crystal and molecular structures of [Cr(Hsal 4- Metsc)2]ClCH3OH and [Cr(Hsal 4-Phtsc)2]Cl have been determined on the basis of single-crystal X- ray diffraction data. In accordance with kinetic inertness of neutral chromium(III) complexes all our attempts to prepare thiosemicarbazonato complexes via ligand-exchange reaction with [Cr(acac)3] have been unsuccessful.

chromium(III) complexes of thiosemicarbazones

nije evidentirano