New Method for the Synthesis
of trans-Hydroxotetraamminenitrosoruthenium(II) Dichloride
and Its Characterization

M. A. Il’yin^a, V. A. Emel’anov^a, A. V. Belyaev^a, A. N. Makhinya^b,
S. V. Tkachev^a, and N. I. Alferova^a

^a Nikolaev Institute of Inorganic Chemistry, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent’eva 3,
Novosibirsk, 630090 Russia

^b Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090 Russia

e-mail:max_ilyin@ngs.ru

Received June 28, 2007

Abstract—A procedure for the synthesis of -[Ru(NO)(NH₃)₄(OH)]Cl₂ in a nearly quantitative yield
(~95%) comprising treatment of a solution of (NH₄)₂[Ru(NO)Cl₅] with ammonium carbonate at t ~80C was
developed. It was found that [Ru(NO)(NH₃)₄(H₂O)]Cl₃ · H₂O and trans-[Ru(NO)(NH₃)₄Cl]Cl₂ formed in the
reaction of [Ru(NO)(NH₃)₄(OH)]Cl₂ with hydrochloric acid at various temperatures most often contain some
initial hydroxy complex. The former compound is unstable, even at room temperature, it slowly eliminates
water and HCl. A procedure for preparing the latter compound in a pure state in 85–90% yield was proposed.
The acidity constant of the complex trans-[Ru(NO)(NH₃)₄(₂)]³⁺ at room temperature ( = (4 1) 10²)
was estimated by ¹⁴N NMR spectroscopy.

DOI: 10.1134/S0036023608070164

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