Preparation and Study of Some Mn(II), Co(II), Ni(II), Cu(II), Cd(II) and Pb(II) Complexes Containing Heterocyclic Nitrogen Donor Ligands
TL;DR: In this paper, a new mixed-ligand complexes with the general formula [M(BT)(BI)2X2] where BT =benzotriazole, BI=benzimidazole.
Abstract: This paper presents a new mixed-ligand complexes with the general formula [M(BT)(BI)2X2] where BT=benzotriazole, BI=benzimidazole, X=SCN and M=Mn(II), Co(II), Ni(II), Cu(II), Cd(II) and Pb(II). The reaction was carried out by using the appropriate molar ratios of metal:ligand (1:1:2:2) (M:BT:BI:X) as required. The resulting products were found to be solids, not soluble in water and in ordinary organic solvents but highly soluble in DMSO. These complexes have been studied by UV-visible, IR and (1H, 13C) NMR spectra, molar conductivity, elemental analysis of C, H, N, determination of metal and magnetic susceptibility. The result suggests that the benzimidazoleas as a monodentate was coordinated with the metal ions through the N atom. Nevertheless, the benzotriazole as bidentate was coordinated with the metal ions through the N2 and N3 atoms. SCN was coordinated with the metal ions through the nitogen atom.
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TL;DR: In this article, the structure of the ligands and their complexes was investigated using elemental analysis, IR, UV-Vis, (1H, 13C) NMR spectroscopy, molar conductivity and magnetic susceptibility measurements.
24 citations
27 Jan 2015
TL;DR: Some Pb(II) complexes of dibasic tridentate Schiff base ligands derived from aldehydes/ketones and benzoylhydrazine have been synthesized and characterized by some physicochemical studies; elemental, spectral (IR, UV, NMR, Mass), magnetic, and conductance analyses as discussed by the authors.
Abstract: Some Pb(II) complexes of dibasic tridentate Schiff base ligands derived from aldehydes/ketones and benzoylhydrazine have been synthesized and characterized by some physico-chemical studies; elemental, spectral (IR, UV, NMR, Mass), magnetic, and conductance analyses. The CHN elemental analysis data showed the formation of 1:1 [M:L] complexes. The obtained molar conductance values revealed non-electrolytic nature. The results of magnetic moment measurements supported diamagnetic phenomenon for the complexes. The infrared spectral data displayed the main coordination sites of ligands towards Pb2+ ions. The electronic spectral results of the complexes showed π→π* (phenyl ring), n→π* (HC=N), CT transition. Based on analytical data trigonal pyramidal geometry for the prepared complexes has been proposed. The antibacterial activity of the prepared complexes was also studied against some gram positive and gram negative bacteria. It is found that some of the complexes are quite effective against tested bacteria.
15 citations
Cites background from "Preparation and Study of Some Mn(II..."
...Shaker [16] presented a mixed-ligand Pb(II) complex with the general formula, [Pb(BT)(BI)2X2], where BT= Benzotriazole, BI= benzimidazole and X=SCN....
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TL;DR: In this paper, the synthesis and structural characterization of Ni(II) complexes derived from dihydroxybenzaldehyde thiosemicarbazones (H 3 L 1, H 3 L 2, h 3 L 3, H3 L 4 ) and 1,2-bis(diphenylphosphino)ethane (dppe) was described.
12 citations
01 Feb 2011
TL;DR: In this paper, some mixed ligand complexes containing 2-methylbenzimidazole and thiocyanate ion were synthesized using elemental analysis, determination of metal, magnetic susceptibility, molar conductivity, infrared, UV-VIS and (1H, 13C) NMR spectra, and X-ray structure analysis.
Abstract: Some mixed ligand complexes containing 2-methylbenzimidazole and thiocyanate ion were synthesized. Free ligands and their metal complexes were characterized using elemental analysis, determination of metal, magnetic susceptibility, molar conductivity, infrared, UV-VIS, and (1H, 13C) NMR spectra, and X-ray structure analysis. The results suggest that the Ag(I) complex has linear geometry, Fe(II), Co(II), Ni(II), Cu(II), Zn(II), and Cd(II) have tetrahedral geometry, Pd(II) complex has square planar geometry, VO(IV) square pyramidal geometry, Pb(II) irregular tetrahedral geometry, and that the Cr(III) and Mn(II) complexes have octahedral geometry. The following general formulae were proposed for the prepared complexes: [AgBX], [CrB3X3], (HB)2[MnB2X4] · 2B and [MB2X2], where B = 2-methylbenzimidazole, HB = 2-methylbenzimidazolium, X = thiocyanate ion, and M = VO(IV), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), Pd(II), Cd(II), and Pb(II). Molar conductance of a 10−3 M solution in N,N-dimethyl formamide (DMF) indicates that all the complexes are non-electrolytes except the Mn(II) complex which is an electrolyte because the molar conductivity of its solution in DMF is high.
8 citations
Cites background from "Preparation and Study of Some Mn(II..."
...Moreover, the value of µeff of Mn(II) d5 was 4.852 A m2, which is within the expected value for a high spin Mn(II) complex (Shayma, 2010)....
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...852 A m2, which is within the expected value for a high spin Mn(II) complex (Shayma, 2010)....
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Journal Article•
TL;DR: Some Pb(II) complexes of dibasic tridentate Schiff base ligands derived from aldehydes and orthoaminophenol have been synthesized and characterized by some physico-chemical studies; elemental, spectral (IR, UV, NMR, Mass), magnetic, and conductance analyses as mentioned in this paper.
Abstract: Some Pb(II) complexes of dibasic tridentate Schiff base ligands derived from aldehydes and orthoaminophenol have been synthesized and characterized by some physico-chemical studies; elemental, spectral (IR, UV, NMR, Mass), magnetic, and conductance analyses. The CHN elemental analysis data showed the formation of 1:1 [M:L] complexes. The obtained molar conductance values revealed nonelectrolytic nature. The results of magnetic moment measurements supported diamagnetic phenomenon for the complexes. The infrared spectral data displayed the main coordination sites of ligands towards Pb 2+ ions. The electronic spectral results of the complexes showed π→π* (phenyl ring), n→π* (HC=N), CT transition. Based on analytical data Trigonal pyramidal geometry for the prepared complexes has been proposed. The antibacterial activity of the prepared complexes was also studied against some gram positive and gram negative bacteria. It was found that complexes are quite effective against some tested bacteria.
1 citations
Cites background from "Preparation and Study of Some Mn(II..."
...Shaker [16] presented a mixed-ligand Pb (II) complex with the general formula, [Pb(BT)(BI)2X2], where BT= Benzotriazole, BI= benzimidazole and X=SCN....
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References
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Book•
01 Jan 1978TL;DR: In this article, the normal modes of vibration are illustrated and corresponding vibrational frequencies are listed for each type, including diatomic, triatomic, fouratomic, five-atomic, six-atomic and seven-atomic types.
Abstract: Inorganic molecules (ions) and ligands are classified into diatomic, triatomic, four-atomic, five-atomic, six-atomic, and seven-atomic types, and their normal modes of vibration are illustrated and the corresponding vibrational frequencies are listed for each type. Molecules of other types are grouped into compounds of boron, carbon, silicon, nitrogen, phosphorus, and sulfur, and the structures and infrared (IR)/Raman spectra of select examples are shown for each group. Group frequency charts including band assignments are shown for phosphorus and sulfur compounds. Other group frequency charts include hydrogen stretching frequencies, halogen stretching frequencies, oxygen stretching and bending frequencies, inorganic ions, and metal complexes containing simple coordinating ligands.
Keywords:
inorganic compounds;
coordination compounds;
diatomic molecules (ligands);
triatomic molecules (ligands);
four-atomic molecules (ligands);
five-atomic molecules (ligands);
six-atomic molecules (ligands);
seven-atomic molecules (ligands);
boron compounds;
carbon compounds;
silicon compounds;
nitrogen compounds;
phosphorus compounds;
sulfur compounds;
group frequency charts
15,951 citations
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TL;DR: Cotton and Wilkinson's Advanced Inorganic Chemistry (AIC) as discussed by the authors is one of the most widely used inorganic chemistry books and has been used for more than a quarter century.
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TL;DR: In this article, the authors proposed a structure elucidation by joint application of UV and nuclear magnetic resonance spectra (NMRS) for visible and visible spectra, respectively, in the presence of UV.
Abstract: Ultraviolet and Visible Spectra. Infrared Spectra. Nuclear Magnetic Resonance Spectra. Mass Spectra. Structure Elucidation by Joint Application of UV
1,895 citations