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

Zvi Harzion, Gil Navon*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)2606-2608
Number of pages3
JournalInorganic Chemistry
Issue number7
StatePublished - 1982


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