Cycles in Newton´s means

In the dynamical system defined by Newton′s means for n complex variables, n≥2 there are invariant, planar curves with (chaotic) dynamics conjugated to the dynamics of z↦z ⁿ on the unit circle in the complex plane. Oblatum 8-III-2000 & 8-XI-2000?Published online: 5 March 2001     

Crystal and molecular structure of tetrapyridyl-copper(II)-bis-nitrato-bis-pyridine

The crystal and molecular structure of a pyridine complex of anhydrous copper(II)nitrate is described. The structure has been solved by vector search methods and refined by least-squares methods to R₁=0.049 [I>2(I)]. The complex lies on a twofold axis parallel toa, and two solvent pyridine molecules lie on twofold axes parallel toc. The copper atom is coordinated by four pyridyl groups and two monodentate NO₃ groups. Crystal data: C₃₀H₃₀N₈O₆Cu, orthorhombic, space group Pnna(52),a=14.446(7),b=12.154(5),c=16.881(4) Å,V=2964(2) ų,Z=4.     

Eisenuntersuchungen

Ohne Zusammenfassung     

Die Flammpunktsbestimmung der Mineralschmier?le

Ohne Zusammenfassung     

Die Unterscheidung von Harz?l und Mineral?l

Ohne Zusammenfassung     

The mechanism of thermal dehydrochlorination. Pyrolysis of 1-Chloro-1-fluoroethane and 1-chloro-1, 1-difluoroethane

The thermal decompositions of 1-chloro-1-fluoroethane and 1-chloro-1,1-difluorethane at atmospheric pressure have been studied in the temperature range 500–600°C in a flow system. The dehydrochlorinations are homogenous in a carbonaceous reactor and unimolecular. The rate constants are given by and The criteria for molecular or chain processes in thermal dehydrochlorinations are discussed.