Complexation of the [Rh(NH3)5H2O]3+ ion in aqueous solutions of H3PO4 based on 31P NMR data

被引：4

作者：

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

Tkachev, S. V. ^{[1
]}

机构：

[1] Russian Acad Sci, Nikolaev Inst Inorgan Chem, Siberian Branch, Novosibirsk 630090, Russia

来源：

RUSSIAN JOURNAL OF COORDINATION CHEMISTRY | 2012年 / 38卷 / 07期

关键词：

NUCLEAR-MAGNETIC-RESONANCE; PHOSPHATE COMPLEXES; RHODIUM(III); PHOSPHORUS; ALUMINUM; ACID;

D O I：

10.1134/S1070328412060024

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The kinetics of the reaction between the [Rh(NH3)(5)H2O](3+) ion and H3PO4 was studied by P-31 NMR at 323-343 K (E (a) = 100.9 +/- 0.3 kJ/mol, lnA = 35.7 +/- 0.1). An empirical dependence of the P-31 chemical shift on the equilibrium pH was found. The acid dissociation constants of the coordinated H2PO (4) (-) (3.9) and H PO (4) (2-) ions (9.1) were estimated. The chemical shifts of the [Rh(NH3)(5)H2PO4](2+), [Rh(NH3)(5)HPO4](+), and [Rh(NH3)(5)PO4](0) complex ions were 8.38 +/- 0.03, 10.76 +/- 0.05, and 13.63 +/- 0.05 ppm, respectively.

引用

页码：445 / 449

页数：5

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