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Rehman F.,Faiz E Am Degree College | Mairaj S.,Faiz E Am Degree College
Oriental Journal of Chemistry | Year: 2012

2-Hydroxy-4-methoxy acetophenone oxime (HMAO) has been successfully employed as a reagent for spectrophotometric determination for Mn(II) at pH range 8.0 to 11.0 in chloroform medium. The composition of the complex 1:2 (metahligand) has been confirm by job's method for continuous variation, Yoe & jones mole ratio method & slope ratio method. The stability constant of the complex is found to be 5.648×107. The dark brown coloured complex obeys Beer's law over the concentration rangei to 12 ppm for Mn(II) ion. The complex has molar absorptivity 2.40 × 102 mol-1cm-1. While their sensitivity is 0.228 ig Mn/cm2.Limits of interference due to the presence of foreign ions in the spectrophotometric determination has also been determined. The standard free energy of the complex is 1.06 Kcal/mole at 30 °C. The complex is stable for one week, HMAO has also been found to give quite satisfactory results for Mn(II) present in synthetic mixtures. The antimicrobial activity of HMAO and Mn-HMAO complex have also been calculated. Source


Rehman F.,Faiz E Am Degree College | Mairaj S.,Faiz E Am Degree College
Oriental Journal of Chemistry | Year: 2012

The 2, 4 di-hydroxy butyrophenone Oxime (DHBOX) behaved as mono protic acid and proton was replaced by the metal ion during complex formation & two type of complexes viz 1:1 and 1:2 in the system. The stability constant of DHBOX with bivalent metal ion was calculated. The order of stability constant was in the order Cu(il)>Ni(ll)>Mn(ll) which is in the agreement with the Irving Williams order. The values of change in free energy (AG), enthalpy (AH) and entropy (AS) for ligand were calculated at different temperature.The effect of ionic strength and jemperature on stability constant were also studied. The antif ungal activity and antibacterial activity of different concentration of test Compounds were measured by determining the growth of test fungi by dry weight increase method and by agar diffusion method against alternaria alternate & E. coli.The order of antimicrobial effect was observed the following order Cu(li)>Ni(ll)>Mn(ll). Source


Mairaj S.,Faiz E Am Degree College | Fazlur-Rehman,Faiz E Am Degree College
Oriental Journal of Chemistry | Year: 2011

Cu(II), Ni(II), Co(II), Mn (II) & VO (II) complexes of 2-Hydroxy-Methoxy Acetophenone oxime (HMAOX) have been isolated and characterized by elemental anlysis, thermogravimetric analysis, magnetic susceptibility measurements, spectral studies and the biological studies of ligand and their complexes. Source


Rehman F.,Faiz E Am Degree College | Mairaj S.,Faiz E Am Degree College
International Journal of ChemTech Research | Year: 2013

3,5-Dibromo-2,4-Dihydroxy acetophenone oxime (DDAO) has been successfully employed as a reagent for spectrophotometric determination for Mn(II) at pH range 10.3 to 10.8 in chloroform medium. The composition of the complex 1:2 (metal:ligand) has been confirm by job's method for continuous variation, Yoe 7 & jones mole ratio method &slope ratio method. The stability constant of the complex is found to be 5.437×107. The water soluble brown coloured complex obeys Beer's law over the concentration range1 to 10.0 μg for 3 -1 -1 Mn(II) ion. The complex has molar absorptivity 5.2 × 103 mol-1cm-1. While their sensitivity is 0.0105 μg Mn/cm2.Limits of interference due to the presence of foreign ions in the spectrophotometric determination has also been determined. The standard free energy of the complex is 10.57 Kcal/mole at 27°C. The complex is stable for one week DDAO has also been found to give quite satisfactory results for Mn(II) present in synthetic mixtures. The antimicrobial activity of DDAO and Mn-DDAO complex have also been calculated. Source


Rehman F.,Faiz E Am Degree College | Mairaj S.,Faiz E Am Degree College | Bhardwaj M.,Faiz E Am Degree College
Oriental Journal of Chemistry | Year: 2011

5-Chloro-2, 4-Dihydroxy Butyrophenone oxime (CDHBO) has been successfully employed as a reagent for spectrophotometric determination for Mn(II) at pH range 7.0 to 11.0 in chloroform medium. The composition of the complex 1:2 (metal:ligand) has been confirm by job's method for continuous variation, Yoe & jones mole ratio method & slope ratio method. The stability constant of the complex is found to be 3.94107. The dark brown coloured complex obeys Beer's law over the concentration rangei to 10 ppm for Mn(II) ion. The complex has molar absorptivity 6.0 103 mol-1 cm -1.While their sensitivity is 0.009 μg Mn/cm2.Limits of interference due to the presence of foreign ions in the spectrophotometric determination has also been determined. The standard free energy of the complex is 10.442 Kcal/mole at 30°C. The complex is stable for one week, CDHBO has also been found to give quite satisfactory results for Mn(II) present in synthetic mixtures. The antimicrobial activity of CDHBO and Mn-CDHBO complex have also been calculated. Source

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