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Differential thermal analysis of some divalent metal chelates of 1,5-dialkylpentane-2,4-diones

1973; Pergamon Press; Volume: 35; Issue: 12 Linguagem: Inglês

10.1016/0022-1902(73)80394-x

1878-1225

Isao Yoshida, Hiroshi Kobayashi, Keiji Ueno,

Synthesis and properties of polymers

Abstract To assess the suitability of some chelate compounds to the zone melting process, some β-diketone chelates of copper(II), beryllium(II), palladium(II), nickel(II) and cobalt(II) were prepared in the hope of identifying those of low melting points and of high thermal stabilities. The β-diketones chosen in this study were heptane-3,5-dione, nonane-4,6-dione, 2,6-dimethylheptane-3,5-dione, 2,8-dimethylnonane-4,6-dione, 2,2,6,6-tetramethylheptane-3,5-dione and tridecane-6,8-dione. Thermal properties such as melting points, thermal stabilities and decomposition temperatures, were investigated mainly by means of differential thermal analysis (DTA). The relationships between thermal properties of the chelates and alkyl-substituents on the ligands were discussed in comparison with pentane-2,4-dionates.