The coordination complexes of Co(II), Ni(II) and Cu(II) derived from 5-bromosalicylidene-3,4-dimethylaniline (BSMA) and 5-bromosalicylidene-3,4-dichloroaniline (BSCA) have been synthesized by conventional as well as microwave methods. These compounds have been characterized by elemental analysis, FT-IR, molar conductance, electronic spectra, 1H-NMR, FAB-mass, ESR, magnetic susceptibility, electrical conductivity and thermal analysis. The complexes are coloured and stable in air. Analytical data revealed that all the complexes exhibited 1:2 (metal: ligand) ratio with coordination number 4 or 6. IR data shows that the ligand coordinates with the metal ions in a bidentate manner through the phenolic oxygen and azomethine nitrogen. FAB-mass and thermal data show degradation pattern of the complexes. Solid state electrical conductivity studies reflect semiconducting nature of the complexes. The Schiff base and metal complexes show a good activity against the Gram-positive bacteria; Staphylococcus aureus and Gram-negative bacteria; Escherichia coli and fungi Aspergillus niger and Candida albicans.

Jain, R & Mishra, A. (2012). Microwave synthesis, spectral, thermal, and antimicrobial activities of some transition metal complexes involving 5-bromosalicylaldehyde moiety.Current Chemistry Letters, 1(4), 163-174.

Shukla, D, Gupta, L. K., and Chandra, S. (2008) Spectroscopic studies on chromium(III), manganese(II), cobalt(II), nickel(II) and copper(II) complexes with hexadentate nitrogen–sulfur donor [N2S4] macrocyclic ligand. Spectrochim. Acta, 71A, 746–750.

Spinu, C., Kriza, A., and Spinu, L. (2001) Studies on N-[2-thienylmethylidene]-2-aminothiazole complexes of Fe(II), Co(II), Ni(II), Cu(II), Zn(II) and Cd(II). Acta Chim. Slov., 48, 257-264.

Chandra, S., and Kumar, U. (2005) Spectral and magnetic studies on manganese(II), cobalt(II) and nickel(II) complexes with Schiff bases. Spectrochim. Acta A, 61A, 219-227.

Iqbal, J., Tirmizi, S. A., and Watto, F. H. (2006) Biological properties of chloro-salicylidene aniline and its complexes with Co(II) and Ni(II). Turk J. Biol., 30, 1-4.

Bagihalli, G. B., Patil, S. A., and Badami, P. S. (2009) Synthesis, physicochemical investigation and biological studies of Zn(II) complexes with 1,2,4-triazole Schiff bases. J. Iran Chem. Soc., 6, 259-270.

Mahajan, K., Fahmi, N., and Singh, R. V. (2007) Synthesis, characterization and antimicrobial studies of Sb(III) complexes of substituted thioimines. Indian J. Chem., 46A, 1221-1225.

Sharma, K., Singh, R., Fahmi, N., and Singh, R.V. (2010) Microwave assisted synthesis, characterization and biological evaluation of palladium and platinum complexes with azomethines. Spectrochim. Acta A, 75, 422-428.

Mohanan, K., Kumari, B. S., and Rijulal, G. (2008) Microwave assisted synthesis, spectroscopic, thermal and antifungal studies of some lanthanide(III) complexes with a heterocyclic bishydrazone. J. Rare Earths, 26, 16-21.

Sun, Y., Machala, M.L., and Castellano, F.N. (2010) Controlled microwave synthesis of RuII synthons and chromophores relevant to solar energy conversion. Inorg. Chim. Acta, 363, 283-287.

Garg, R., Saini, M.K., Fahmi, N., and Singh, R.V. (2006) Spectroscopic and biochemical studies of some manganese(II), oxovanadium(V) and dioxovanadium(VI) complexes S/O and N donor agents synthesized under microwave conditions. Trans. Met. Chem., 31: 362-371.

Mahajan, K., Swami, M., and Singh, R.V. (2009) Microwave synthesis, spectral studies, antimicrobial approach and coordination behavior of antimony(III) and bismuth(III) compounds with benzothiazoline. Russ. J. Coord. Chem., 35, 179-185.

Dubey, R.K., Dubey, U.K., and Mishra, C.M. (2008) Synthesis and physicochemical characterization of some Schiff base complexes of chromium(III). Indian J. Chem., 47, 1208-1212.

Mishra, A.P., Sharma, N., and Jain, R., (2011) Synthesis and structure of some novel Schiff base complexes with Cu(II) and Ni(II). J. Indian. Chem. Soc., 88, 1429-1434.

Ourari, A., Ourari, K., Moumeni, W., and Sibous, L. (2006) Unsymmetrical tetradentate Schiff base complexes derived from 2,3-diphenol and salicylaldehyde or 5-bromosalicylaldehyde. Trans. Met. Chem., 31, 169-175.

Raman, N., Raja, S. J., Joseph, J., and Raja, J.D. (2007) Synthesis, spectral characterization and DNA cleavage study of heterocyclic Schiff base metal complexes. J. Chil. Chem. Soc., 52, 1138-1141.

Nakamoto, K. (1998) Infrared and Raman Spectra of Inorganic and Coordination Compounds, 5th ed. John Wiley and Sons, Part A & B, New York.

Mishra, A.P., Mishra, R.K., and Shrivastava, S.P. (2009) Structural and antimicrobial studies of coordination compounds of Vo(II), Co(II), Ni(II) and Cu(II) with some Schiff bases involving 2-amino-4chlorophenol. J. Serb. Chem. Soc., 74, 523-535.

Abdallah, S.M., Zyed, M.A., and Mohamed, G.G. (2010) Synthesis and spectroscopic characterization of new tetradentate Schiff base and its coordination compounds of NOON donor atoms and their antibacterial and antifungal activity. Arabian J. Chem., 3, 103-113.

Neelakantan, M.A., Marriappan, S.S., Dharmaraja, J., Jeyakumar, T., and Muthukumaran, K. (2008) Spectral, XRD, SEM and biological activities of transition metal complexes of polydentate ligands containing thiazole moiety. Spectrochim. Acta, 71A, 628-635.

Lever, A.B.P. (1984) Inorganic Electronic Spectroscopy, 2nd Ed. Elsevier, New York.

Chandra, S., Jain, D., Sharma, A.K., and Sharma, P. (2009) Coordination modes of a Schiff base pentadentate derivative of 4-aminoantipyrine with cobalt(II), nickel(II) and copper(II) metal ions: synthesis, spectroscopic and antimicrobial studies. Molecules, 14, 174-190.

Mohamed, G.G., Omar, M.M., and Hindy, A.M. (2006) Metal complexes of Schiff bases: preparation, characterization and biological activity. Turk J. Chem., 30, 361-379.

Hathaway, B.J. (1987) Comprehensive Coordination Chemistry, Vol. 5, Pergamon Press U.K.

Sujamol, M.S., Athira, C.J., Sindhu, Y., and Mohanan, K. (2010) Synthesis, spectroscopic characterization, electrochemical behavior and thermal decomposition studies of some transition metal complexes with an azo derivative. Spectrochim. Acta, 75A, 106-112.

Soliman, A.A., and Mohamed, G.G. (2004) Study of the ternary complexes of copper with salicylidene-2-aminothiophenol and some amino acids in the solid state. Thermochim. Acta, 421, 151-159.

Wang, Y.F., Liu, J.F., Xian, H.D., and Zhao, G.L. (2009) Synthesis, crystal structure and kinetics of thermal decomposition of the nickel(II) complex of the Schiff base 2-[(4-methylphenylimino)methyl]-6-methoxyphenol. Molecules, 14, 2582-2593.

Makode, J.T., Yaul, A.R., Bhadange, S.G., and Aswar, A.S. (2009) Physicochemical characterization, thermal and electrical conductivity studies of some transition metal complexes of bis-chelating Schiff base, Russ. J. Inorg. Chem., 54, 1372-1377.

Mishra, A.P., and Pandey, L.R. (2005) Synthesis, characterization and solid state structural studies of oxovanadium(IV)-O,N donor schiff base chelates, Indian J. Chem., 44, 94-97.

Singh, V. P., Katiyar, A., and Singh, S. (2008) Synthesis, characterization of some transition metal(II) complexes of acetone p-amino acetophenone salicyloyl hydrazone and their antimicrobial activity. Bio Metals, 21, 491-498.

Chohan, Z. H. (1999) Ni(II), Cu(II) and Zn(II) metal chelates with some thiazole derived Schiff-bases: their synthesis, characterization and bactericidal properties. Metal Based Drugs, 6, 75-79.

Mohamed, G. G., Omar, M. M., and Ibrahim, A. A. (2009) Biological activity studies on metal complexes of novel tridentate Schiff base ligand. Spectroscopic and thermal characterization. Eur. J. Med. Chem., 44, 4801-4812.

Chohan, Z. H., Munawar, A., and Supuran, C. T. (2001) Transition metal ion complexes of Schiff bases synthesis, characterization and antibacterial properties. Metal Based Drugs, 8, 137-143.