An organometallic chimie douce approach to new Re(x)W(1-x)O3 phases

Re(x)W(1-x)O3.H2O and Re(x)W(1-x)O3 phases are prepared by a new organometallic chimie douce concept employing the organometallic precursor methyltrioxorhenium.     

Mechanisms of radiation-induced viscous flow: role of point defects

Mechanisms of radiation-induced flow in amorphous solids have been investigated using molecular dynamics computer simulations. It is shown for a model glass system, CuTi, that the radiation-induced flow is independent of recoil energy between 100 eV and 10 keV when compared on the basis of defect production and that there is a threshold energy for flow of approximately 10 eV. Injection of interstitial- and vacancylike defects induces the same amount of flow as the recoil events, indicating that point-defect-like entities mediate the flow process, even at 10 K. Comparisons of these results with experiments and thermal spike models are made.     

Synthesen von Heterocyclen, 30. Mitt.: Über Flaven- und Flavon-carbonsäuren

Zusammenfassung Benzpyrano-cumarine lassen sich durch alkohol. Lauge am Lactonring zu Flaven-carbonsäuren-(3) aufspalten. Sie können ferner in Eisessig mit Hilfe von Chromsäure zu Benzpyronocumarinen oxydiert und diese dann zu Flavon-carbonsäuren-(3) hydrolysiert werden.