THE STRUCTURE OF AG4BR3+ IN MOLTEN ALKALI-METAL NITRATE

被引：1

作者：

BENGTSSON, LA ^{[1
]}

HOLMBERG, B ^{[1
]}

机构：

[1] UNIV LUND,CTR CHEM,POB 124,S-22100 LUND,SWEDEN

来源：

ACTA CHEMICA SCANDINAVICA | 1991年 / 45卷 / 06期

关键词：

D O I：

10.3891/acta.chem.scand.45-0588

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Molten mixtures of AgNO3-(K,Na)NO3 and AgBr-AgNO3-(K,Na)NO3 have been investigated by liquid X-ray scattering and Raman spectroscopic techniques at 280-degrees-C. The coordination of silver(I) by nitrate ions was shown to be asymmetric and bidentate, with the metal ion out of the nitrate plane. The two shortest Ag-O distances are 2.43 and 3.16-angstrom (cf. 2.45 and 3.05-angstrom in Ref. 1). The coordination geometry is less open than that observed in melts more concentrated in Ag(I). The structure of the complex Ag4Br3+ was investigated. Four Ag-Br distances can be identified at 2.62-angstrom, indicating that the bonds are of significant covalency. However, no distinct Ag-Ag separations can be detected. A large freedom of movement of Ag+ is a likely explanation for these results, which are in good agreement with literature data on similar AgX-Ag2O-AgOx (X = Cl, Br, I; Ox = oxoanion) ion-conducting glass systems.

引用

页码：588 / 592

页数：5

共 51 条

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