Synthesis and Characterization of some New Dinuclear Complexes of Ni(II), Pd(II) and Pt(II) with Bulky Substituted Thioether Ligands

Authors : Am AMEEN, N H BUTTRUS, Omar K HASSAN

Pages : 43-51

View : 16 | Download : 10

Publication Date : 2019-07-25

Article Type : Research Paper

Abstract :A series of new multidentate ligands insert ignore into journalissuearticles values(L1-L4);, 1,1,2,2-tetrakis [2-insert ignore into journalissuearticles values(benzylthio);ethylthio]ethyleneinsert ignore into journalissuearticles values(L1);,1,1,2,2-tetrakis [2-insert ignore into journalissuearticles values(o-tolylthio); ethylthio]);  ethylene insert ignore into journalissuearticles values(L2);  , 1,1,2,2-tetrakis [3-insert ignore into journalissuearticles values(p-chlorophenylthio); ethylthio] ethylene insert ignore into journalissuearticles values(L3);  and 1,1,2,2-tetrakis [2-insert ignore into journalissuearticles values(o-aminophenylthio); ethylthio] ethyene insert ignore into journalissuearticles values(L4);  were prepared from the reaction of equimolamar amount of insert ignore into journalissuearticles values(4-mercapto-2-thia-1-butyl benzene or o-methyl-4-mercapto-1-thia-1-butyl benzene or p-chloro-4-mercapto-1-thia-1-butyl benzene or o-amino-4-mercapto -1-thia-1-butyl benzene and KOH); with tetrachloroethylene in insert ignore into journalissuearticles values(4:4:1); molar ratio . Reaction of the above ligands with nickel insert ignore into journalissuearticles values(II); , palladium insert ignore into journalissuearticles values(II);  and platinum insert ignore into journalissuearticles values(II); chloride salts gave the complexes of the general formulas : [M2insert ignore into journalissuearticles values(L);Cl4] and [Ni2insert ignore into journalissuearticles values(L);Cl2]Cl2 M=Niinsert ignore into journalissuearticles values(II); , Pdinsert ignore into journalissuearticles values(II); and Ptinsert ignore into journalissuearticles values(II); , L=L1-L4 . The synthesized ligands have been characterized on the basis of their elemental analysis , FTIR, 1H ,13C NMR , and their complexes were characterized by elemental analysis metal content, UV-Vis. spectroscopic technique ,conductivity measurements and magnetic measurements. On the basis of these studies, a four coordinate tetrahedral or square planar geometry around the metal ions in the complexes has been proposed.
Keywords : Bulky substituted thioether, Ni II, Pd II, Pt II, complexes, Square planar complexes