NMR Studies of the Hexaaquoruthenium(III) Ion in Aqueous Solutions

Zvi Harzion; Gil Navon

doi:10.1021/ic00137a015

NMR Studies of the Hexaaquoruthenium(III) Ion in Aqueous Solutions

Zvi Harzion, Gil Navon^*

^*Corresponding author for this work

School of Chemistry

Tel Aviv University

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Aqueous solutions containing the Ru(H₂O)₆³⁺ ion were studied by proton NMR. The magnetic moments of this ion are in the range μ_eff = 2.02−2.055 μ_B at temperatures between 278 and 329 K, respectively, corresponding to low-spin d⁵ configuration with some orbital contribution according to Kotani's expression. From the chemical shifts of the water protons, a value of the proton hyperfine coupling constant of A = 3.3 ± 0.3 MHz was calculated with the assumption of a spin-orbit coupling constant of 1200 ± 200 cm⁻¹. This value of A which is the largest found yet for a hexaaquo ion corresponds to a covalency parameter of λ = 0.27. From the water proton relaxation times, values of electron spin relaxation times of 2 and 6 ps were estimated at temperatures of 278 and 327 K, respectively.

Original language	English
Pages (from-to)	2606-2608
Number of pages	3
Journal	Inorganic Chemistry
Volume	21
Issue number	7
DOIs	https://doi.org/10.1021/ic00137a015
State	Published - 1982

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title = "NMR Studies of the Hexaaquoruthenium(III) Ion in Aqueous Solutions",

abstract = "Aqueous solutions containing the Ru(H2O)63+ ion were studied by proton NMR. The magnetic moments of this ion are in the range μeff = 2.02−2.055 μB at temperatures between 278 and 329 K, respectively, corresponding to low-spin d5 configuration with some orbital contribution according to Kotani's expression. From the chemical shifts of the water protons, a value of the proton hyperfine coupling constant of A = 3.3 ± 0.3 MHz was calculated with the assumption of a spin-orbit coupling constant of 1200 ± 200 cm−1. This value of A which is the largest found yet for a hexaaquo ion corresponds to a covalency parameter of λ = 0.27. From the water proton relaxation times, values of electron spin relaxation times of 2 and 6 ps were estimated at temperatures of 278 and 327 K, respectively.",

author = "Zvi Harzion and Gil Navon",

year = "1982",

doi = "10.1021/ic00137a015",

language = "אנגלית",

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journal = "Inorganic Chemistry",

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T1 - NMR Studies of the Hexaaquoruthenium(III) Ion in Aqueous Solutions

AU - Harzion, Zvi

AU - Navon, Gil

PY - 1982

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N2 - Aqueous solutions containing the Ru(H2O)63+ ion were studied by proton NMR. The magnetic moments of this ion are in the range μeff = 2.02−2.055 μB at temperatures between 278 and 329 K, respectively, corresponding to low-spin d5 configuration with some orbital contribution according to Kotani's expression. From the chemical shifts of the water protons, a value of the proton hyperfine coupling constant of A = 3.3 ± 0.3 MHz was calculated with the assumption of a spin-orbit coupling constant of 1200 ± 200 cm−1. This value of A which is the largest found yet for a hexaaquo ion corresponds to a covalency parameter of λ = 0.27. From the water proton relaxation times, values of electron spin relaxation times of 2 and 6 ps were estimated at temperatures of 278 and 327 K, respectively.

AB - Aqueous solutions containing the Ru(H2O)63+ ion were studied by proton NMR. The magnetic moments of this ion are in the range μeff = 2.02−2.055 μB at temperatures between 278 and 329 K, respectively, corresponding to low-spin d5 configuration with some orbital contribution according to Kotani's expression. From the chemical shifts of the water protons, a value of the proton hyperfine coupling constant of A = 3.3 ± 0.3 MHz was calculated with the assumption of a spin-orbit coupling constant of 1200 ± 200 cm−1. This value of A which is the largest found yet for a hexaaquo ion corresponds to a covalency parameter of λ = 0.27. From the water proton relaxation times, values of electron spin relaxation times of 2 and 6 ps were estimated at temperatures of 278 and 327 K, respectively.

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NMR Studies of the Hexaaquoruthenium(III) Ion in Aqueous Solutions

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