„Nichtcarbenoide”︁ Zwischenstufen bei der Fragmentierung von α-Cyclopropyltosylhydrazonen

The sodium salts of the tricyclic tosylhydrazones 1, 4 and 5 yield by base-catalyzed fragmentation between 130–160° the monocyclic ring expansion products 2, 3 and 6. IR.-spectrometry suggests a diazoalkane A as the principal intermediate of the fragmentation. Besides the known carbene mechanism the reaction is considered to pass through a noncarbenoid intermediate.     

Synthese „anorganischer”︁ Tintenfisch-Moleküle

Inorganic Pode-Type Molecules The reaction of monosubstituated polyethylenglykoles [m = 0—4, R = Cl, OCH₃, OAs(CH₃)₂, OSi(CH₃)₃] with amino compounds (CH₃)_xE[N(CH₃)₂]_y(E = Si, x = y = 2; E = Si, x = 1, y = 3; E = P, x = 0, y = 3; E = As, y = 0, y = 3) results in the formation of pode-type molecules of the formula . The synthesis and rearrangement of these compounds by heating is described.     

Bilder aus der „verbotenen Welt”︁ der Industrie: Acryl auf Leinwand

The industry painter Alexander Calvelli, born 1963, is known for his seemingly photorealistic portraits of the “forbidden world” of industry. Showing both active and abandoned manufacturing sites with a purely aesthetic eye, free of all ideology and interpretation, he reveals the structures at the very foundation of our industrial society, and also sets monuments to those branches that are now in decline, including mining and steel industry.