Studies on Phase Equilibrium of ternary System Zn(ClO4)2-DAPTU(MAPTU)-H2O at 30℃

Abstract

Abstract: The solubilities and the refractive indexes of saturated solutions of the title system at 30℃ were studied and the corresponding solubility diagrams and refractive index diagrams were constructed. All the solubility curves and refractive index curves of the two systems consist of three branches, corresponding to DAPTU(N, N′-diantipyrylthiourea)or MAPTU (N-methyl-N'-antipyrylthourea), ZnL₂(ClO₄)₂·nH₂O(L=DAPTU, n=2;L=MAPTU, n=0) and Zn(ClO₄)₂·6H₂O, respectively. The ternary compounds and binary compound formed in the title systems are new compounds reported for the first time in this paper.They are incongruously soluble in water. They were characterized by chemical analysis and elemental analysis, IRspectra and TG-DTG.In the Zn(DAPTU)₂(ClO₄)₂·2H₂O, DAPTUacts as a neutral bidentate ligand coordinating through carbonyl O, and in the Zn(MAPTU)₂(ClO₄)₂, MAPTUacts as a neutral bidentate ligand coordinating through O, S.The perchlorate ion is not coordinated to the Zn²⁺.The probable coordination number of Zn²⁺ is 4.

Key words: Ternary system, Solubility, N,N′-diantipyrylthiourea, N-methyl-N′-an-tipyrylthiourea, Perchlorate zinc

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WANG Zhi-Yin, TANG Zong-Xun, CHEN Kai-Xun, GUO Zhi-Zhen. Studies on Phase Equilibrium of ternary System Zn(ClO₄)₂-DAPTU(MAPTU)-H₂O at 30℃[J]. Chem. J. Chinese Universities, 1994, 15(8): 1114.

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Studies on Phase Equilibrium of ternary System Zn(ClO₄)₂-DAPTU(MAPTU)-H₂O at 30℃

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