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Citation: Zhou Zhixian, Du Chenxia, Zhou Zonghua, Yu Kaibei, Zhou Zhongyuan. EXTRACTION OF SCANDIUM PICRATE BY CROWN ETHER AND CRYSTAL STRUCTURE OF BENZO-15-CROWN-5 PICRATE COMPLEX[J]. Chinese Journal of Applied Chemistry, ;1993, 10(6): 31-34. shu

EXTRACTION OF SCANDIUM PICRATE BY CROWN ETHER AND CRYSTAL STRUCTURE OF BENZO-15-CROWN-5 PICRATE COMPLEX

1.
1. Department of Chemistry, Zhengzhou University, 450052 Zhengzhou;
2.
2. Department of Chemistry, Sichuan University, Chengdu;
3.
3. Analysis and Testing Center of Chengdu Branch, Chinese Academy of Sciences, Chengdu

Received Date: 23 February 1993
Available Online: 29 June 1993

The extraction of scandium picrate by benzo-15-crown-5 (B15C5) and dibenzo-18-crown-6(DB18C6) has been studied. The compositions of the extracts have been determined by the slope analysis method as Sc(B15C5)_1.5(OH)(Pi)₂ and Sc(DB18C6)(OH)(Pi)₂(Pi=pi-crate ion) with apparent extraction equilibrium constants logK_ex=5.69 and 3.59 (25℃), respectively. The crystal of the Sc(B15C5)Pi₃·2H₂O·CH₃CN belongs to triclinic system,space group P₁, a=1.2678(2), b=1.3764(3), c=1.9440(4)nm, α=81.03(2)°, β=70.88 (1)°, γ=70.71(2)°, Z=2. The mechanism of the extraction has been elucidated.
- scandium picrate,
- crown ether,
- extraction,
- crystal structure
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