_____________________________________________________________________________________________________ *Corresponding author: Email: melajaily@yahoo.com; International Research Journal of Pure & Applied Chemistry 5(3): 229-237, 2015, Article no.IRJPAC.2015.020 ISSN: 2231-3443 SCIENCEDOMAIN international www.sciencedomain.org Mixed-Ligand Chelate Formation of Co(II), Ni(II), Cu(II) and Zn(II) Ions with Schiff Base as Main Ligand and Amino Acid as Co-Ligand M. M. El-ajaily 1* , F. S. Alassbaly 1 , A. M. Etorki 2 and A. A. Maihub 2* 1 Department of Chemistry, Faculty of Science, Benghazi University, Benghazi, Libya. 2 Department of Chemistry, Faculty of Science, Tripoli University, Tripoli, Libya. Authors’ contributions This work was carried out in collaboration between all authors. Author MMEA supervision the laboratory work and wrote the protocol of the first draft of the manuscript and literature searches. Author AAM managed the data analysis and approved the final manuscript with the assistance of the first author. Author AME managed some laboratory techniques and some laboratory analysis. Author FSA preformed all the laboratory work and she is M. Sc student under the supervision of Prof. Dr. M.M. El-ajaily in collaboration with the other authors. Finally all authors read and approved the final manuscript. Article Information DOI: 10.9734/IRJPAC/2015/11786 Editor(s): (1) Li Cai, Department of Chemistry, University of South Carolina Salkehatchie, USA. Reviewers: (1) S. Theodore David Manickam, Centre for Scientific and Applied Research, School of Basic Engineering and Sciences, PSN College of Engineering and Technol-ogy, Tirunelveli, India. (2) Anonymous, University of Cape Coast, Ghana. Complete Peer review History: http://www.sciencedomain.org/review-history.php?iid=808&id=7&aid=7144 Received 4 th June 2014 Accepted 8 th July 2014 Published 8 th December 2014 ABSTRACT A bidentate NO type Schiff base ligand (L 1 ) has been obtained by the condensation reaction of 4- dimethylaminobenzaldehyde and 2-aminophenol and used as main ligand and l-Alanine as co- ligand (L 2 ), Four novel mixed ligand chelates of composition [M(L 1 L 2 )(H 2 O) 2 ].nH 2 O, where M represents, Co(II), Ni(II), Cu(II) and Zn(II) ions, in which n= 1, 1.7, 5 and 7 as sited later for chelates. The resulting Schiff base and the mixed ligand chelates were characterized by CHN elemental analysis, molar conductivity, magnetic moment, UV/Vis, IR, 1 H-NMR and mass spectra. All the obtained physiochemical data showed an octahedral structures. Original Research Article