Extended Born-Green equation: A new approach for determining pair potentials in disordered systems

The Born-Green equation was tested using molecular dynamics data for liquid rubidium at 319 K. The unsatisfactory results of this equation for the pair potential are caused by the insufficient precision of the Kirkwood approximation for describing the triplet correlation function g₃(r,s,t). A more realistic ansatz for g₃(r,s,t) was employed in the formulation of an extended Born-Green equation. This new approach gives much better results for the potential than the simple Born-Green equation.     

Inversion and prochirality in bis-thio-and-selenoether complexes of trimethylplatinum(IV) halides

The¹H NMR spectra of the complexes [PtXMe₃(Me₂E)₂], X - Cl and Br, E - S and Se, show a non-equivalence of the Me₂E methyl groups at low temperatures arising from a lack of symmetry at the metal centre. Inversion at the E atoms equalises the environments, and activation energies for the process have been computed for three complexes.     

Notiz zur chemischen Reaktionskinetik

Ohne Zusammenfassung     

Emissionsspektrographische bestimmung von Stickstoffspuren über die Cyanbandenemission in AIIIBV-Halbleitern

Traces of nitrogen in GaP and GaAs are determined by an emission spectrographic method. The nitrogen, which is bound in the powder samples as nitride, reacts with the carbon of the powder mixture at the temperatures of the a.c. arc to form the CN-radical. The CN-band at 388.4 nm (head of the band) and the Sc I atomic line at 390.7 nm (standard) are used for the analysis. The detection limit (3s-criterion) is 100 ppm nitrogen (500 ng) in 5 mg of A^IIIB^V-semiconductor sample.     

Zur Bewertung von Rohbenzol mit Hilfe der Gaschromatographie

Ohne Zusammenfassung