Abstract
Reactions of cyanoacetylhydrazine (CAH = H
2
L) with Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and U(VI)O
2
in ethanolic solution give three types of complexes with the general formulae, [M(H
2
L)
2
X
2
] S(M = Co(II), Ni(II) or Cd(II); X = Cl
−
or Ac
−
; S=EtOH or (H
2
O), [M(HL)
2
]S(M = Co(II), Cu(II), Zn(II) or U(VI)O
2
and S = H
2
O and [Hg(HL)Cl.H
2
O]. On the other hand, the reaction of Fe(III) chloride, Cu(II) chloride or bromide with CAH in aqueous ethanolic solution is accompanied by the reduction to Fe(II) and Cu(I) giving complexes with the formulae [Fe(H
2
L)
2
(H
2
O)
2
]Cl
2
(H
2
L = CAH) and [Cu(H
2
L
−
)X] (H
2
L
−
= malonic acid amido-hydrazide, X = Cl
−
or Br
−
), respectively. The reduction process followed by the addition of H
2
O to the triple bond (C
−
=N), forming malonic acid amido-hydrazid, is only observed in case of Cu(I) complexes. Characterization of the isolated solid complexes have been made on the basis of elemental analyses, spectral (u.v., visible, i.r., n.m.r.) and magnetic measurements.