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In aqueous sodium hydroxide [Ru(NH3),N0I3+ was converted to [RUNH,(NH,)~NO]~+ and [RU(NH,)~NO~]+. [RuNH,(NH,)~NO]X, (X = Br or I) was isolated from solutions of [OH-] = 0 . 5 ~ and [RU(NH,)~NO,]X,H,O (X = CI, Br, or I) from solutions of [OH-] = 5 ~. On setting aside or warming, [RuOH(NH,)~NO]X~ (X = Br or I ) were obtained; in solutions of [OH-] = 0.5-1.5~ the product was contaminated with [RU(NH,)~N~]~+. The physical properties of [RuNH,(NH,),NO]X, and [Ru(NH~)~NO,]X,H,O are reported.NITROSYL complexes of ruthenium were for some years considered to be inert to reaction at the nitrosyl group. Recently reactions of a variety of ruthenium-nitrosyl complexes with nucleophiles (ammonia, hydrazines, hydroxylamine, azide, and hydroxide) have been investigated.l-' Of particular relevance to the work here are the reactions of pentacyanonitrosylruthenium( II), [Ru-( CN),N0I2-, anionobis(2,2'-bipyridyl)nitrosylruthenium-(11), [RuX(bipy),N0I2+, and anionobis(0-phenanthro1ine)nitrosylruthenium(II), [RuX(phen),N0I2+ (X = C1, Br, or NO,) with hydroxide ion to form the corresponding nitro-complexes [Ru(CN),NO,]~-,~ [Ru(bipy),NO,X], and [Ru(phen),NO,X] . 2 3 3 For [Ru(bipy),NO,Cl] the reaction was reversible ; , no information on reversibility is available for [Ru(CN),N02]4-. We have shown previously that nitros ylpent a-amunineru thenium( 11) , [ Ru-( NH3),N0l3+, formed (dinitrogen) penta-ammineruthenium(II), [Ru(NH3),NJ2+, with N2H4 or NH, and (dinitrogen oxide) pent a-ammineruthenium, [ Ru(NI3,) 5-N,0I2+, with NH,OH.4 Also, we found [Ru(NH3),N0l4+ and hydroxide ion gave trarts-hydroxytetra-ammine-

). The effect of the excess kinetic energy of O('D) atoms on their reactions with some gaseous compounds was investigated using two different experimental methods. O('D) atoms with maximum excess kinetic energies of 41 + 5 and 31 kcal/mol respectively, were produced by flash photolysis of N 2 0 (1800-2300 A) and by photolysis of N 2 0 at 2139 A, in the presence and absence of He which is a deactivator of kinetic energy. In the first method the competition between N 2 0 and one of CO,, Xe, CO, and N2 for O('D) atoms was measured and it was found that the relative rate constants kco2/kNZo, k~. / k~,~, kco/kNZo, and k N 2 / k~2~ are not affected by the excess kinetic energy of the O('D) atoms.In the second method the competition between neopentane and one of C 0 2 , Xe, CO, and NP for O('D) atoms was measured. The results of the second study were not entirely conclusive. However, they also indicate no effect or at best only a very small effect of excess kinetic energy.

In wäßrigen NaOH‐Lösungen reagiert das [Ru(NH3)5NO]3+ ‐ Komplexion zu den Komplexen (I) und (II), die als Halogenide isoliert wurden.