Reactivity and structure of dinitrogen complexes of ruthenium(II)
- 1 January 1970
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 1479-1483
- https://doi.org/10.1039/j19700001479
Abstract
The formation of [Ru(NH3)5(N2)]2+ from ruthenium(III) trichloride and ammonia by zinc reduction is described. That neither the dinitrogen in the above complex, nor that in the dinuclear complexion, [{Ru(NH3)5}2(N2)]4+, can be reduced to ammonia by common reducing agents in aqueous solution is demonstrated by attempts to obtain 15NH3 from the corresponding 15N2 complexes. It had previously been reported that part of the N2 in [Ru(NH3)5(N2)]2+ could be reduced to ammonia by sodium borohydride in water, but we show now that this erroneous result was caused by the presence of a hydrazine impurty, probably [Ru(NH3)5(N2H4)]2+. The contaminant can be removed from [Ru(NH3)5(N2)]2+ by oxidation with mercuric chloride. The Raman spectrum of [{Ru(NH3)5}2(N2)][BF4]4 shows ν(NN) to be as 2100 cm.–1, and the complexion is diamagnetic, consistent with the linear structure [(NH3)5Ru–NN–Ru(NH3)5]4+.Keywords
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