Document Type : Research Paper

Author

Mosul University - College of Science

Abstract

A number of trinuclear complexes with hexadentate Schiff base ligand H2L= (a condensation product of diacetylbis p-phenylendiamine and salicylaldehyde ) have been prepared . The synthesized complexes having formula [ M2M- (H2L)2 Cl4]Cl2 and [M2M- (L)2]Cl2 ; where M = Co(II) , Ni(II) , Cu(II) and M- = Zn(II) , Cd(II) , Hg(II) . H2L and L the neutral and dibasic forms of Schiff base . The complexes were prepared by the reaction of metal chloride with the ligand in both neutral and basic media . The ligand and its complexes were studies by means of chemical physical and spectral methods. These studies were revealed that the Schiff base act as neutral hexadentate and dibasic hexadentate ligand coordinated through the azomethine nitrogen and phenolic oxygen atoms in neutral and basic media .These studies suggested an octahedral geometry or square planar for two side metal ions in neutral and basic media respectively; The central metal atom is tetra – coordination in all complexes .

Keywords

Main Subjects

References :
1-   M.T. , M.G. , B.Z., and B.N. , (2006) . Synthesis and crystal structure of Schiff based on AMTTO. Naturforsch B61 , pp 1421 – 1428
2-   M.S., S.M.S. , and K.P., (2004) . Structure and conformation of Ni complex : (2- hydroxo – 3 – piperidine 1- yl – methyl – N – N –    ( bis – 5 – bromobenzyl – proplenedimine ) Ni(II) perchlorate ). Cryst . Res . Techonl , Vol. 39 , pp . 185 – 189 .
3-   B.L. , S.H.M. , K.N.Sh. (2011) . Synthesis , spectal characterization and vitro microbiological evaluation of novel glyoxal , biacetyl and benzyl bis – hydrazone macrocyclic Schiff bases and the . Co(II) , Ni(II) and Cu(II) complexes . polyhedron , vol. 30 , pp. 1507 – 15011
4-   O.AL- O. (2012) . Synthesis , characterization and theoretical treatment of sandwich Schiff bases complexes derived from salicylaldehyde with some transition metals and study of its biological activity . Inter . J . of chem.. Res. Vol. 2 , No. 3 pp. 1-5 .
5-   M.J . and J.A. Kh. (2010). Antitumour activities of some Schiff base derived from benzoin , salicylaldehyde , amino phenol and 2 , 4 dinitro phenyl hydrazine Tha. J . Pharm. Sci Vol. 34 , pp. 20-31 .
6-   R.A. , B.S. and G.V. (2008) . Variation in coordinative property of two different N2O2 donor Schiff base ligands with Ni(II) and Co(II) ions characterization.Struct. Chem. , Vol. 3 , pp.459
7-   K.B. , F. D. and  J.T. (2004) . New poly Fe (II) complexes of N4O dinucleating Schiff bases and pseudohalides : syntheses , structures and magnetic properties . Inorg. Chem. Vol. 43 , no. 4 , pp . 1574 – 1586 .
8-   S . Z . and  C. N. K. (2011) . Studies on some trinuclear Schiff base complexes Inter. J. Chem. Tech. Res. Vol. 3 , no. 4 , pp. 1962 – 1968 .
9-   S. Z. and X. M. C. (2004) . Recent advances in luminescent monomeric , multinuclear and polymeric Zn(II) and Cd(II) coordination complexes . Aust. J. Chem. , Vol. 57, pp. 703-712.
10-              M. T. , H. K. and M. D. (1999) Antimicrobal study of mononuclear and binuclear mixed ligand Cu(II) complexes derived from 1 , 10 – phenathroline. Trans. Met. Chem. , Vol. 24 , pp. 13 – 17
11-              R. S. G. and K. E. G. (1993) . study of poly – Schiff bases rubber. Protective agent in natural rubber. Int. J. Polym. Mater. , Vol. 23 , pp. 17 – 26 .
12-              N. S. and A. N. S. (2011) . Physico – Chemical and biological studies of Cu(II) , Co(II) and Ni(II) complexes of an N4 coordinating ligand derived from diacetyl bis – ethylenediamine and benzoic acid . J. Serb. Chem. Soc. , Vol. 67 , pp. 1-11 .
13-              W.J. (1971). The use of conductivity measurements in organic solvents for the characterization of coordination compounds. Coord. Chem. Rev. , Vol. 7 , pp 81 – 122 .
14-              M. S. , T. S. , S. M. , (2012) . some theoretical study on the interaction between of a salen Schiff – base ligand with Zn(II) , Cd(II) , Hg(II) ions. J. Chem. And phar. Res. , Vol. 4 , no. 1 , pp. 27 – 32 .
15-              W.H.H. and A.E.G. (2012) . Synthesis , charact erization and antibacterial activites of new pd(II) ,  pt(IV) complexes of som unsymmetrical tetradentate Schiff basses . Amer. Chem. Sci. j. , Vol. 2 , no. 3 , pp. 86 – 99 .
16-              S.S. and K. D. (2005). Synthesis and spectroscopic characterization of some transition metal complexes of new hexadentate N2S2O2 Schiff base ligand  spectro chimica Acta. Part A62 , pp. 383 – 393 .
17-              G.C.P. , and D. A. Th. (1972) N-aryl salicyladimine complexes : IR. And PMR. Spectra of the ligand and vibrational frequencies of their metal (II) chelates. J. Iorg. Nucl. Chem. , Vol. 34  , pp. 3357 - 3367
18-              S.Ch. , M.T. , K. Sh. (2009) Mn(II) , Co(II)  Ni(II)  and Cu(II) complexes of tetraazamacro cyclic ligand : Synthesis , characterization and biological Screening . J. Iran. Chem. Soc. , Vol. 2 , no. 3 , pp. 310 – 316 .
19-              F. A. C. , G. W. , C. A. M. , and M. B. (1999) " Advanced inorganic chemistry " 6thed. , John – Wiley and Sons , New York , pp. 810 – 842 .
20-              P. , R. K. A. (2008) . Ni(II) complexes of hydrazone of isoniazide and their magneto – spectral – electrochemical , thermal and antimicrobial invistigations. Res. Lett. Inorg. Chem. , ID 35091 , 1 - 4 .
21-              G. w. (1987) " Comprehensive Coordination Chemistry " , Vol. 2 , Pregamon press , London , pp. 316 – 318 .
22-               P. P. S. , U. P. Sh. , R.M. , and R. t. (1975) . Synthesis and structural studies of some Co(II) Cd(II) complexes with Lewis bases. J. Inorg. Nucl. Chem. , Vol. 37 , pp. 679 – 688 .
23-              E. A. A. , K. S. AL – N. and O. M. AL – R. , (2010) . Synthesis and Characterization of dinuclear metal complexes stabilized by tetradentate Schiff base ligands . Amer. J.Appl. Sci. , Vol. 7 , no. 5 , 628 – 633 .
24-              N. S. , N. K. S. and C. K. (1989) . Synthetic and spectroscopic heterobimetallic complexes containing diamagnetic and paramagnetic metal ions . Bull. Soc. Jap. , Vol. 62 , pp. 3328 – 3333 .
25-              N. K. , F. K. , and S. K. (2007) Mono – Di – and Trinuclear Cu(II) complexes of a Schiff base ligand , 2- {( E – 6 – (1 E ) – 2 – hydroxphenyl ) methylen amino pyridine – 2 – yl imino imino methyl } phenol. Tur. K. J. Chem. , Vol. 3 , pp. 271 – 277.