NH3 and Derivatives

NH3 and Derivatives. As part of a systematic study of properties and functions of catalysts for ammonia synthesis, correlations have been sought between the promoter addition procedure and the physicochemical properties and activity of catalysts obtained by the fusion of natural magnetite. The results show that the manner of addition of the promoter affects, to a large extent, the investigated properties and catalyst activity. 

Two papers have discussed the formation of atmospheric aerosols from the NH3—SO2—HgO— air gas-phase reaction. Previous theories have concentrated on the possibilities of chemical reaction in pre-existing droplets or on 

A steady-state flow apparatus has been used to determine the pressure dependence of the relative quasi-bimolecular rate constants for the reactant pairs NH3 + McgN and Me2HN + McaN in their reaction with BFg. The reactions between NH3 and the amalgams of Mn, U, Ti, and A1 produce MngHgN, UNi.sa, TiN, and AIN, respectively. Orders of reaction were determined for the above cases but for Fe and Or, which have very low solubility in Hg, reaction was so slow that no reaction products could be isolated or identified. An investigation of the photolysis of NH3 and ND3 has revealed an important isotope effect. The ratio of molecular and atomic hydrogen produced by photolysis at 147 and 123.6 nm was h,/ while at 185 nm Th dissociation  

Quantized rotational motion had only been observed previously for HCl, HF, and DCl until a study was made of NH3 dissolved in liquid SF,  

A reinterpretation of molecular beam hyperfine data for NH3 and NHa has led to reassignments for the hyperfine patterns of six NHa inversion doublets. As a result, the sign of the nitrogen-hydrogen spin-spin interaction constant has been altered. Calculation of the potential barrier to inversion of NH3 using the SCF Xa SW method has been reported. The results depend heavily on the choice of sphere radii owing to the way the total energy was computed. 

---

Examples of weak bases are NH3 and derivatives of NH3 called amines. For any conjugate acid-base pair, (Ka for the acid) X (Kb for the base) = Kw. 

---