On the electron impact induced hydroxyl loss from o-nitrostyrene

Unimolecular hydroxyl (OD^˙) loss from regio- and stereo-specifically labelled o-nitrostyrenes 1a, 1c and 1d results in the formation of an ion which upon collisional activation gives identical mass spectra. Suggestions are made which aim at explaining: (i) the loss of stereochemical integrity of the diastereotopic methylene hydrogens in the course of hydroxyl elimination; and (ii) to account for the collision induced losses of CO and HNC from the [M—hydroxyl]⁺ ion.     

Retardierte potentiale und Darstellung von Raumzeitfunktionen mit unbeschränktem Definitionsbereich

Ohne Zusammenfassung Vorgelegt von H. Görtler     

Über Polysilane. I. Kristallstruktur von Dodecaphenylcyclohexasilan Heptabenzol

On Polysilanes. I. Crystal Structure of Dodecaphenylcyclohexasilane Heptabenzene The crystal structure of the title compound has been determined and refined to a R of 0.112. The crystal benzenes are slightly disordered. The molecular structure of (Ph₂Si)₆ is a centrosymmetric Si₆-chair with 6 axial and 6 equatorial phenyl substituents respectively. The mean Si–Si distance of 239.4(3) pm is at the upper limit of the range 231–241 pm experimental determined for the Si–Si homo bond.     

The analyzing power Ay(θ) for the 9Be(p, n)9B reaction from 8 TO 15 MeV

The analyzing power A_y(θ) for the ⁹Be(p, n)⁹B reaction was measured at seven energies between 8.1 to 15.0 MeV for reaction angles between 0° and 100° (c.m.). The A_y(θ) values are predominantly negative and exhibit a smooth variation with energy. The significance of these results in Lane optical- model calculations for the ⁹Be + nucleon system and in comparisons between the observables P^y(θ) and A_y(θ) is indicated.