Attempt Towards The Synthesis And Characterization Of Som Mixed Ligands Complexes Of Ni Cu And Cd With Bipyridine Phenanthroline Malonamide And Urea

Visible spectra for solutions of Ni:bipy, Ni:bipyrnarea, Ni: bipy :lVU, , Ni: phen:, Ni; phen: urea, Ni :phen:rnMil, Cu:bipy, Cu:bipy:urea Rnd Cu:bipy:MA ~Iere recorded.rnFor the Ni complexes the ii max clid not shift with increRsernin pH but the intensity decreased. For therncopper complexes increase in pH shifted the "t.m ax tornshorter wave length in the basic medium.rnThe synthesis WRS carried out in acidic medium.rnThe complex formed between Ni and bipy '. in thernmolar ratio 1: 1 c011d not be isohlted, but when therncOllcentratiCln of bipy increased two times pink coloredrncrystals of the formula Ni(bipy) 3C12' 6H20 were isolated.rnJm attempt to synthesise a nickel mixed ligandrncomplex 'lith bipY:l,rea and billY: malonamide was done,rnlJut in both cases Ni(bipY)3012.6H20 waS isolRted.rnThe binary complex Ni(phen)C12 .6H20 was synthesisedrnby the reaction of phen'and Ni012 .6H20. Thernsynthesis of the mixed ligand complex with phen :urearnand phen:malonamide was then tried but in both casesrnNi(phen)C1rn2rn.6H20 Vias the product.rnWhen CuC1rn2rn,2Hrn2rn0 and bipy reacted in the molarrnratio 1: 1 at pH 11·,5 Cu(lJipy)Cl" I'/as isolated but c.rnwhen the pH was adjusted to 7.0 a complex ?lith a probale formula Cu(bipy) (OH)Ul. 3H20 I/LlS isolate(.rnJm attempt Ims mmie to synthesise the mixed ligandrncomplex of copp~r' 'lith bipy: urea Hnd bipy: malonamicle.rnIn both casos Cu(biI)y)Ol; was formed.rnThe binary complexes of urea Hnd malonamide withrncopper were syn'chesiseCi to gi vo Cu( urea)C12 ,H20 anCirnCU(MA)2C12·2H20.rnPhenanthroline re8cted with CuC12 ,2H20 in aqueousrnmedium at pH 3.8 to form Cu(phen)C12 ,rnCadmium chloride gave white crystals with bothrnbipyridine and phenthroline, The complexes were obtainedrnas precipito.tes vlhen the cadmium was added to thernligand solution ,ithout heating. These complexes wererninsoluble in water and other common solvents. Simi-'rnlar results Iwre cbt8ined also in the presence of urearnand malonamide.rnIn methanol:othanol solvent system the binaryrncomplexes Ni(M.A)2C12 and CU(MA)C12 .H20 were synthesisedrnby refluxins the stiochiometric quantities forrneight hours, Cd(MA)C12 ,H20 Vas also synthesised inrnthe same manner. The reaction of copper chloride withrnurea gave a complex of the formula Cu(urea)4C12 . Fromrncadmium chloride and urea the complex ecl( urea)C12 .H20rnwas isolated,rnIn an attempt to synthesise complexes of Ni:bipy:MA and Hi:phen:lVlJ.., Ni(MA)C12 was reacted with both basesrnseparatly and it; was found thst both bases substituternthe malonamide.. I,hen OU(M,l)012,H20 reacted with bipyridinerna compl()x of the formula Ou(bipY)20l2,H20 wasrnisolated

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