الفهرس 
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Abstract
The complexes of 4,6-bis (4-chlorophenyl)-2-amino-1,2-dihydropyridine-3-carbinitrile (L1) with Cr(III), Mn(II), Fe(III), Co(II), Ni(II), Cu(II), Zn(II), Zr(IV), Ce(IV) and U(VI) were synthesized and separated as solids of a color characteristics of the metal ion. The complexes are characterized through their elemental analysis, IR, UV–Vis., 1H NMR, melting point, molar conductivity, magnetic properties as well as thermogravimetric analyses. The results enable us to characterize the complexes and make an assessment of the bonding and structures inherent in them. The results obtained indicated that all of the isolated complexes are formed in 1:2 molar ratios for all the elements. All of the complexes reported here in are hydrates with various degrees of hydration and air stable at room temperature. The chemical formulas of the complexes suggested from the elemental analysis agree quite well with their proposed formulas. The metal content is in a well agreement with each other and proves the molecular formulas of the prepared complexes. Qualitative reactions revealed the presence of sulphate, acetate, nitrate and chloride ions as counter ions. Solutions of these complexes react with barium chloride, ferric chloride, ferrous sulphate and silver nitrate giving a white precipitate of barium sulphate, silver chloride and a black ring of FeSO4.NO also a red colure of ferric acetate indicating the existence of sulphate, chloride, nitrate and acetate in the ionic form i.e., outside the coordination sphere. Also, the molar conductance values of free ligand (L1) and their complexes (DMSO-d6) with standard reference using 10-3 M solution at room temperature were found in the rang 10.5 to 275 S cm2 mol−1. Conductance data showed that the metal complexes are electrolyte compared with free ligand (L1) alone. The magnetic moments (as B.M.) of the complexes were measured at room temperature where Hg[Co(SCN)4] used as a calibrant. The Zn(II), Zr(IV), U(VI) and Ce(IV) complexes are found in diamagnetic character with molecular geometries octahedral but the Cr(III), Mn(II), Fe(III), Co(II), Ni(II) and Cu(II) complexes found in paramagnetism with measured magnetic moment values at 3.82, 5.93, 5.72, 4.8, 3.7 and 1.73 B.M, respectively. 4,6-bis (4-chlorophenyl)-2-oxo-1,2-dihydropyridine-3-carbinitrile (L2) reacted with Mn(II), Fe(III), Co(II) and Ni(II) in methanol and acetone at room temperature to form a solid complexes with characteristic colure of every metal ion. The molar ratio for all complexes synthesized is (L2):M=2:1 which was established from the result of chemical analysis. Also, all the prepared complexes contain water molecules and the number of bound water molecules in these complexes being different. The thermogravimetric and infrared spectroscopic data also confirmed the presence of water in the composition of the complexes. The molar conductance values of (L2) and their complexes (DMSO-d6) were measured and found in the range 15.9 to 230.6 S cm2 mol-1 at room temperature. The magnetic moments (as B.M.) of the complexes were measured at room temperature and the Mn(II), Fe(III), Co(II) and Ni(II) complexes are found in paramagnetism character and octahedral geometry around the metal ion with measured magnetic moment values at 5.81, 5.62,3.72 and 2.73 B.M., respectively. The metal–ligand binding of their complexes was predicted by using the density function theory (DFT) at the B3LYP-CEP-31G level of theory and total energy, dipole moment estimation of different metal ions (L2) structure. The biological activity of (L2) ligand and their metal chelates are studied against some selected Gram-positive and Gram-negative bacteria and two species of fungi.