Maleates of Mn(II), Fe(II), Co(II), and Ni(II) as Precursors
for Synthesis of MetalPolymer Composites

L. I. Yudanova^a, V. A. Logvinenko^a, L. A. Sheludyakova^a, N. F. Yudanov^a, P. P. Semyannikov^a,
S. I. Kozhemyachenko^a, I. V. Korol’kov^a, N. A. Rudina^b, and A. V. Ishchenko^b

^a Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences,
pr. Akademika Lavrent’eva 3, Novosibirsk, 630090 Russia

^b Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences,
pr. Lavrent’eva 5, Novosibirsk, 630090 Russia

e-mail: judanova@niic.nsc.ru

Received September 5, 2013

Abstract—Comparison was made for the structural, IR spectral, and thermoanalytical characteristics of normal
[M₁(H₂O)₂(C₄H₂O₄)](H₂O) (M₁ = Co(II) and Ni(II)) and acid maleates [M₂(H₂O)₄(C₄H₃O₄)₂] (M₂ = Mn(II),
Fe(II), Co(II) and Ni(II)). Only structures of acid maleates contain intramolecular asymmetric hydrogen bond
whose asymmetry increases in the series of transition metal salts. Thermal decomposition of Co(II), Ni(II) nor-
mal maleates, and Mn(II), Fe(II), Co(II), Ni(II) acid maleates proceeds in three stages. Onset decomposition
temperatures for the first and second stages decreases in the series of normal maleates Co(II) Ni(II) and
increases in the series of acid maleates Fe(II) < Co(II) < Ni(II) Mn(II). Onset temperature of the third stage
decreases in the series of both normal maleates Co(II) > Ni(II) and acid maleates Mn(II) > Fe(II) > Co(II) >
Ni(II).

DOI: 10.1134/S0036023614100222

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