International Science Community Association Research Journal of Chemical Sciences 2231 - 606X 5 8 2015 August 18 Study on X-Ray Diffraction and Biological Activity of some Rear Earth Metal Complexes on the Basis of Mixed Ligands 23 27 EN I. Kalim 1 Department of Chemistry, University of Engineering and Technology, Lahore-54890, PAKISTAN N. Zahra 2 Pakistan Council of Scientific and Industrial Research Laboratories Complex, Ferozepur Road, Lahore-54600, PAKISTAN A. Nisa 3 S. Hina. 4 T. Fazeelat 5 Kapse V.D. 1 Department of Physics, Arts, Science and Commerce College, Chikhaldara 444807, Maharashtra State, INDIA Agbaire P.O. 1 Department of Chemistry, Delta State University, Abraka, Delta State, NIGERIA Emonido P.E. 2 Akpoghele O. 3 Panhekar Deepa 1 1 Department of Chemistry, Dr. Ambedkar College, Deeksha Bhoomi, Nagpur, INDIA Belkhode Sheetal 2 Department of Chemistry, Institute of Science, Nagpur, INDIA Kalambe Ashok 3 Dawle Nisha 4 Ingale V.D. 1 Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, 431004, Maharashtra, INDIA Shinde V.G. 2 Rajbhoj A.S. 3 Gaikwad S.T. 4 > Research Paper 2015 7 24 2015 August 18 Studies on the Powder x-ray diffraction parameter of metal complexes such as La(III), Ce(III), Pr(III), Nd(III), Sm(III), Gd(III), Tb(III) and Dy(III) has been synthesized by 4-methoxyplenylmaine and salicylaldehyde, o-vanillin having equiamolar ratio of 1:1:1(metal : ligand : ligand)in the same solvent. The complexes were different physico-chemical properties such as different colour, different melting points and different crystal systems. The x-ray diffraction studies are orthorhombic, monoclinic, tetragonal crystal structure has been proposed for the mixed (Land L) ligands and their lanthanide (III) complexes. The x-ray diffraction data suggest that monoclinic crystal system for La(III), Ce(III) complexes and orthorhombic crystal system for Pr(III), Nd(III), Gd(III), Dy(III) and Tb(III) complexes and other were tetrahedral crystal system for Sm(III) complex. The x-ray diffraction data were also being used for the determination of various parameter, unit cell volume and miller indices values (h k l). The screened for their antibacterial activity against bacterium of Staphylococcus aurious, B.subtilis (Gram-positive) and Aspergillus Niger and Fusarium oxysporum(Gram- negative). The result indicated that the complexes exhibited good antibacterial, antifungal active than that of free ligands. Copyright@ International Science Community Association