Attempt Towards the Synthesis and Characterization of Som Mixed Ligands Complexes of Ni, Cu, And Cd with Bipyridine Phenanthroline Malonamide and Urea
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Date
1985-09
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Publisher
Addis Ababa Universty
Abstract
Visible spectra for solutions of Ni:bipy, Ni:bipy
area, Ni: bipy :lVU, , Ni: phen:, Ni; phen: urea, Ni :phen:
Mil, Cu:bipy, Cu:bipy:urea Rnd Cu:bipy:MA ~Iere recorded.
For the Ni complexes the ii max clid not shift with increRse
in pH but the intensity decreased. For the
copper complexes increase in pH shifted the "t.m ax to
shorter wave length in the basic medium.
The synthesis WRS carried out in acidic medium.
The complex formed between Ni and bipy '. in the
molar ratio 1: 1 c0\11d not be isohlted, but when the
cOllcentratiCln of bipy increased two times pink colored
crystals of the formula Ni(bipy) 3C12' 6H20 were isolated.
Jm attempt to synthesise a nickel mixed ligand
complex \'lith bipY:\l,rea and billY: malonamide was done,
lJut in both cases Ni(bipY)3012.6H20 waS isolRted.
The binary complex Ni(phen)C12 .6H20 was synthesised
by the reaction of phen'and Ni012 .6H20. The
synthesis of the mixed ligand complex with phen :urea
and phen:malonamide was then tried but in both cases
Ni(phen)C1
2
.6H20 Vias the product.
When CuC1
2
,2H
2
0 and bipy reacted in the molar
ratio 1: 1 at pH 11·,5 Cu(lJipy)Cl" I'/as isolated but c.
when the pH was adjusted to 7.0 a complex ?lith a probale formula Cu(bipy) (OH)Ul. 3H20 I/LlS isolate(\.
Jm attempt Ims mmie to synthesise the mixed ligand
complex of copp~r' \'lith bipy: urea Hnd bipy: malonamicle.
In both casos Cu(biI)y)Ol; was formed.
The binary complexes of urea Hnd malonamide with
copper were syn'chesiseCi to gi vo Cu( urea)C12 ,H20 anCi
CU(MA)2C12·2H20.
Phenanthroline re8cted with CuC12 ,2H20 in aqueous
medium at pH 3.8 to form Cu(phen)C12 ,
Cadmium chloride gave white crystals with both
bipyridine and phenthroline, The complexes were obtained
as precipito.tes vlhen the cadmium was added to the
ligand solution \,ithout heating. These complexes were
insoluble in water and other common solvents. Simi-'
lar results Iwre cbt8ined also in the presence of urea
and malonamide.
In methanol:othanol solvent system the binary
complexes Ni(M.A)2C12 and CU(MA)C12 .H20 were synthesised
by refluxins the stiochiometric quantities for
eight hours, Cd(MA)C12 ,H20 \Vas also synthesised in
the same manner. The reaction of copper chloride with
urea gave a complex of the formula Cu(urea)4C12 . From
cadmium chloride and urea the complex ecl( urea)C12 .H20
was isolated,
In an attempt to synthesise complexes of Ni:bipy:MA and Hi:phen:lVlJ.., Ni(MA)C12 was reacted with both bases
separatly and it; was found thst both bases substitute
the malonamide.. I,hen OU(M,l)012,H20 reacted with bipyridine
a compl()x of the formula Ou(bipY)20l2,H20 was
isolated
Description
Keywords
of Ni, Cu, And Cd