Reaction of NO with hypochlorous acid

The reaction between NO(g) at concentrations between 0.1 and 1.0 Torr in 1-atm N₂ and aqueous solutions of NaClO has been studied over the pH range of 6–12 and hypochlorite concentrations between 0.01 and 1.0M. A very rapid and efficient reaction occurs leading to the production of about 30%–40% of the NO as NO₂ and with conversions of NO up to 98% at about 1-sec contact time. It is shown that a fast chain reaction initiated by the endothermic step can account for the data. The very exothermic reaction NO + ClO^? → NO₂ + Cl^? is shown to be at least 30-fold slower than i. The overall reaction seems very promising as a method of reducing NO and NO₂ emissions from the exhausts of industrial plants.     

Graphs for cone preserving maps

Let K be a closed, pointed, full cone in a finite dimensional real vector space. We associate with a linear map A for which AK?K four directed graphs. For two of the graphs the vertex set is the collection of all faces of K, and for two the vertices are all the extreme rays of K. We relate the irreducibility and primitivity of A to the strong connectedness of some of these graphs.     

Classical surface scattering computations; Rainbows and energy exchange

Computational techniques (a “response-function” method and a molecular dynamics procedure) for classical calculations of atom-surface scattering are described. The methods are illustrated by calculations for a model of neon scattering from the silver (111) surface. Calculations for clamped and initially stationary lattices show complex classical rainbow effects with multiple rainbows due to scattering from different regions of the crystal surface. These effects are not destroyed by inelasticity or energy exchange with cold crystals. Calculations at higher temperatures show, however, that thermal effects do smear out the rainbow effects and lead to rather featureless angular distributions similar to those observed experimentally for this system.     

The transformation of α-aminoacids into fluoroacids

The reactions of some α-aminoacids with excess sodium nitrite in polyhydrogen fluoride-pyridine are described.