Fertility inhibitors macrocyclic complexes of bivalent manganese: synthetic, spectroscopic and medicinal approach.

The modern physico-chemical, spectroscopic and biochemical methods have proved an important tool to elucidate the constitution of transition metal complexes. This paper presents a brief account of the synthesis, spectroscopic and medicinal aspects of tetraazamacrocyclic compounds of manganese(II). Sixteen to eighteen membered tetraamide macrocyclic ligands DTTD(1) and DTTD(2) have been synthesized by the condensation of 1,2-diaminoethane and 1,3-diaminopropane with phthalic acid in the presence of condensing reagents dicyclohexylcarbodiimide and 4-dimethylaminopyridine. On reduction these macrocyclic ligands give new tetraazamacrocycles TTD(1) and TTD(2) which form complexes with manganese (II) nitrate and manganese (II) acetate. Based on chemical analyses, molecular weight determinations, conductance measurements, magnetic moment, IR spectra, (1)H NMR, (13)C NMR spectra, electronic spectra, mass spectra and X-ray spectral analysis, an octahedral geometry has been assigned to the newly synthesized products. The formulation of the complexes of the type [Mn(TTD(n))X(2)] [where, n or 2, X (NO(3)) or (CH(3)COO)] has been established on the basis of chemical composition. The possibilities of potential uses of these complexes as fungicides and bactericides, studied in vitro, are also discussed. The testicular sperm density, sperm morphology, sperm mortality, density of cauda epididymis, spermatozoa and fertility in mating trials and biochemical parameters of reproductive organs of rat have been examined and discussed.