1-amino-2-thiobenzimidazoleimines as novel ambidentate ligand systems
摘要:
Azomethine derivatives of 1-amino-2-thiobenzimidazole (H2L) were synthesized and studied by IR and H-1 NMR spectroscopy. Thiobenzimidazoline tautomeric form of these compounds was found to predominate in a solid state and DMSO solution. Novel mono- and binuclear metal chelates M(HL)(2) and M2L2 (M = Ni(II), Cu(II), Co(II), Zn(II), Cd(II)) were synthesized on the basis of H2L derivatives and their composition and structures were established from IR, H-1 NMR, EXAFS, and magnetochemical data. The composition of coordination sphere was shown to produce no effect on ferromagnetic exchange in binuclear Cu(II) complexes.