Reaction of carbon dioxide with a bimetallic octadienylbridged palladium complex

Reaction of equimolar amounts of μ-1–3-η:6–8-η-octadienatobis(1,1,1,5,5,5-hexafluoroacetylacetonatopalladium) and triisopropylphosphine gives a bimetallic octadienyl-bridged complex, in which one palladium atom is η¹ -bound to the terminal carbon of the octadienyl chain. Insertion of CO₂ into this PdC bond gives a carboxylate complex; acidic decomposition and hydrogenation of the carboxylate complex gives pelargonic acid. The results are discussed in relation to the mechanism of the palladium-catalyzed reaction between butadiene and carbon dioxide.     

Das Vorkommen von Aconits?ure im Zuckerrohrsaft und Colonialzucker

Ohne Zusammenfassung     

Combined Mössbauer and LIII-edge X-ray absorption study of mixed- valent EuPd2Si2 and EuNi2P2

The mean valence of Eu is determined by L_III-edge X-ray absorption (L_III-XA) and ¹⁵¹Eu Mössbauer isomer shift measurementd for the mixed-valent compounds EuPd₂Si₂ and EuNi₂P₂ in the temperature range from 1.7 to 300 K. For EuPd₂Si₂, the behaviour of the satellite line observed in the Mössbauer spectra was investigated in detail. From a comparison of the L_III-Xa and Mössbauer results obtained on identical samples the valence/isomer shift calibration problem as well as possible final-state effects in L_III-XA spectra are discussed.     

Eine verbesserte Schleifvorrichtung zur Herstellung von Kugeln aus harten Materialien

Ohne Zusammenfassung

---

     

Die Elektronenemission bei Röntgenbestrahlten Ferriten

Ohne Zusammenfassung