Metal complexes of sulphur-nitrogen chelating agents. III. 2-aminocyclo-pentene-l-dithiocarboxylic acid complexes of Cr(III), Fe(III), Co(III), Fe(II) and Co(II)

Abstract

With 2-aminocyclopentene-l-dithiocarboxylic acid (ACDA) complexes of the type M(ACDA)₂ · nH₂O (Co(II), N = 3; Fe(II), N = 2), Cr(ACDA)₃ · 4H₂O and M(ACDA)₃ (Fe(III) and Co(III)) have been prepared. The compounds have been characterized from their infrared and electronic spectra, magnetic moment and thermal analysis. The Co(II) complex is of square planar configuration. The i.r. spectra suggest that in the Fe(II) and Fe(III) complexes bonding take place from (N,S^-) donor sites of the ligand and in the Co(II), Co(III) and Cr(III) complexes disulphur chelation occur. The electronic spectra of the latter two complexes support this view. The Fe(II) complex is probably polymeric in nature.