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Citation: CHEN San-Ping, JU Zhan-Feng, GAO Sheng-Li. Synthesis and Properties of Zinc L-Threonate Complex[J]. Chinese Journal of Applied Chemistry, ;2001, 18(9): 761-763. shu

Synthesis and Properties of Zinc L-Threonate Complex

1.
Department of Chemistry, Northwest University, Xi'an 710069

Received Date: 16 November 2000
Available Online: 4 April 2001
Fund Project: 国家自然科学基金(29871023) (29871023)陕西省教育厅专项科研计划项目(00JK131)资助课题 (00JK131)

The solid complex of zinc L-threonate has been prepared from the reaction mixture of L-ascorbic acid, calcium carbonate and hydrogen peroxide in water at 0~3℃.It is purified by methyl alcohol extraction under reduced pressure.The composition of the complex is determined by chemical and elemental analyses and its formula fits Zn(C₄H₇O₅)₂.The purity of the complex is 99.60% by HPLC.The IR spectra indicate that Zn²⁺ in the complex coordinates to oxygen atom of the carbonyl group and oxygen atom of the carboxyl group, while the proton of the carboxyl group is dissociated.It is assumed that the coordination number of Zn²⁺ is 4.The TG DTG results show that the intermediate and final products of the thermal decomposition of the complex are Zn(CH₃COO)₂ and ZnO, respectively.
- L-threonic,
- zinc L-threonate,
- synthesis,
- character
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