Novel 3d-metal complexes with 1,2-diamino-3-(2-benzothiazolyl)-4(5H)-ketopyrrole: Synthesis, spectroscopic and structural investigations

The reaction between 1,2-diamino-3-(2-benzothiazolyl)-4(5H)-ketopyrrole (HL) in dmf and the appropriate metal salt M(CH3COO)2 (M = Zn(II), Co(II) and Ni(II)) in methanol affords the coordination compounds [ZnL2]·H2O·dmf (1), [CoL2] H2O (2) and [NiL2] (3). The synthesis, as well as spectroscopic and structural characterization, is reported.