Epr evidence for the formation of the six-coordinate pentafluoronitridotechnetate(VI) anion in solution

被引：4

作者：

Baldas, J ^{[1
]}

Boas, JF ^{[1
]}

Ivanov, Z ^{[1
]}

James, BD ^{[1
]}

机构：

[1] LA TROBE UNIV,SCH CHEM,BUNDOORA,VIC 3083,AUSTRALIA

来源：

TRANSITION METAL CHEMISTRY | 1997年 / 22卷 / 01期

关键词：

D O I：

10.1023/A:1018482122708

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The reaction of AsPh(4)[TcNX(4)] (X = Cl or Br) with 'naked' F- in MeCN solution has been shown by e.p.r. spectroscopy to result in the facile substitution of the halo ligands by fluoride. Addition of six equivalents of NBu(4)F . 3H(2)O has provided, for the first time, direct evidence for the formation of the six-coordinate [TcNF5](2-) in solution. An e.p.r. study of ligand exchange of Cs-2[TcNCl5] (4 x 10(-2) - 5 x 10(-4) mol dm(-3)) in 28.6 mol dm(-3) aqueous HF has shown that the distribution of the five [TcNF(n)Cl4(4-n)](-) (n = 0-4) species is concentration dependent, with the formation of [TcNF4](-) being favoured by dilution.

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页码：74 / 78

页数：5

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