ELECTRONIC SPECTRUM OF HEXAFLUORONICKELATE(4) ANION

被引：26

作者：

ALLEN, GC

WARREN, KD

机构：

[1] Department of Chemistry, University College, Cardiff, Wales

来源：

INORGANIC CHEMISTRY | 1969年 / 8卷 / 04期

关键词：

D O I：

10.1021/ic50074a010

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The electronic spectrum of the hexafluoronickelate(IV) anion has been studied by diffuse reflection in Na2NiF6 and K2NiF6, between 4 and 45 kK. The weak absorptions at 12.9 and 16.0 kK and the stronger bands at 19.0 and 25.3 kK are assigned, respectively, to d-d transitions from a 1A1g(t2g6) ground state to 3T1g, 3T2g, 3T1g, and 1T2g(t2g5eg) states, and the intense bands at 30.8 and 38.9 kK, to π →eg excitations. The broad band at 19.0 kK shows marked vibrational fine structure which is attributed to the superposition of a symmetric α1g progression on the vibronically (t1u) allowed transition. Least-squares fitting of the d-d bands using the full Tanabe and Sugano strong-field matrices yields Dq = 2010 cm-1, B = 515 cm-1, and β = 0.43. The degree of covalency indicated, although exceptionally high for a fluoride complex, is not unexpected in view of the large formal charge on the metal. © 1969, American Chemical Society. All rights reserved.

引用

页码：753 / &

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[2]

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