On the Nuclear Energy Generation Rate in a Simple Analytic Stellar Model

This paper is concerned with the hydrostatic equilibrium of a purely gaseous star generating energy at a rate . By the common technique of integration theory of special functions the total net rate of nuclear energy generation is evaluated analytically for a linear density distribution function assumed for a simple stellar model.     

Über Phosphorstickstoffverbindungen. XXXIII. Reaktionen von Diphenyltrichlorphosphoran mit Hydraziniumsalzen und -derivaten

Hydrazinium monochloride disproportionates on interaction with diphenyl-trichlorophosphorane, giving N₂ and [(C₆H₅)₂P(Cl)? N? PCl(C₆H₅)₂]Cl. The phosphinazine dihydrochloride [(C₆H₅)₂PCl? NH? NH? PCl(C₆H₅)₂]Cl₂ is obtained according to equation (4). The preparation of the P? N five-ring compound X, formulated in ?Inhaltsübersicht”?, is described.     

Diborheterocyclen: Oxadiborolan – Oxadiborinan – Diazadiborinan

Diboron Heterocyclic Compounds: Oxadiborolane – Oxadiborinane – Diazadiborinane The diboryl compounds R(Cl)B(CH₂)_nB(Cl)R (R ? Cl or CH₃; n = 2, 3) and the silylated or stannylated starting materials [(CH₃)₃Y]₂X (Y ? Si or Sn; X ? S, NCH₃, O, NCH₃? NCH₃) were used for (5+1)- and (4+2)-cyclocondensation reactions. Dimethylether was an additional starting molecule. While no thiadiborinanes could be isolated, the nitrogen or oxygen containing heterocycles were formed in varying yields. Synthesis and properties of these compounds are described.