Synthesis and spectroscopic studies of the complexes of tumor cell differentiating agent hexamethylene bisacetamide with manganese and cobalt halides

The syntheses of the complexes of tumor cell differentiating agent hexameth ylene bisacetamide (HMBA) with manganese (II) and cobalt(II) halides which include M-2(HMBA)(3)X-4 (M = Mn and Co; X = Cl cut Br) have been reported. The complexes have been characterized by elemental analysis and their struc tures have been established on the basis of their electronic spectra, e.s.r . spectra and magnetic susceptibilities. All these complexes have been assi gned the mixed octahedral-tetrahedral structures and similar to the corresp onding nickel complexes [1], can correctly be formulated as [M(HMBA)(3)][MX 4].