The state of Cu2+ ions in concentrated aqueous ammonia solutions of copper nitrate

被引：11

作者：

Anufrienko, V. F. ^{[1
]}

Shutilov, R. A. ^{[1
]}

Zenkovets, G. A. ^{[1
]}

Gavrilov, V. Yu ^{[1
]}

Vasenin, N. T. ^{[1
]}

Shubin, A. A. ^{[1
]}

Larina, T. V. ^{[1
]}

Zhuzhgov, A. V. ^{[1
]}

Ismagilov, Z. R. ^{[1
]}

Parmon, V. N. ^{[1
]}

机构：

[1] Russian Acad Sci, Boreskov Inst Catalysis, Siberian Branch, Novosibirsk 630090, Russia

来源：

RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2012年 / 57卷 / 09期

关键词：

RESONANCE;

D O I：

10.1134/S0036023612090033

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Stabilization of Cu2+ ions in concentrated aqueous ammonia solutions of copper nitrate in a wide range of ammonium ion concentrations has been studied by EPR and electronic absorption spectroscopy. Three types of Cu2+ associates with different types of orbital ordering have been identified. The ammonium ion concentration in a solution has a decisive effect on the type of orbital ordering of Cu2+ ions in associates. In all cases, Cu2+ ordering in associates is caused by the existence of bridging OH groups in the axial and equatorial positions of [Cu(NH3) (n) (H2O)(6 - n) ](2+) complexes (n < 6). At a high concentration of ammonium ions, weakly bound associates of tetramminecopper with the ground state are formed. In solutions with low ammonium concentrations, bulky associates with the and ground states and associates of Cu2+ ions with the ground state with hydroxyl groups in the equatorial plane and axial water molecules are formed.

引用

页码：1285 / 1290

页数：6

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