Isocyanid- und heteroallen-verbrückte metallkomplexe : V. μ3-CS2-komplexe

Purple IrCl₃(CCl₂)(PPh₃)₂ results from reaction between IrHCl₂(PPh₃)₃ and Hg(CCl₃)₂. X-ray crystal structure determination reveals an octahedral complex with trans-phosphine ligands and a short IrC distance to the CCl₂ ligand of 1.872(7) Å, compatible with an iridiumcarbon double bond. Chloride is easily displaced from the dichlorocarbene ligand and the products which have been derived include IrCl₃(CO)(PPh₃)₂, IrCl₃(CS)(PPh₃)₂, IrCl₃(CNMe)(PPh₃)₂, IrCl₃(CClNMe₂)(PPh₃)₂, IrCl₃(CNHCH₂CH₂NH)(PPh₃)₂ and IrCl(CSCH₂CH₂S)-(PPh₃)₂.     

Function cones and interpolation

We consider interpolation of operators acting on functions that belong to a given cone Q with the so‐called decomposition property. The set of all positive functions whose level sets are the level sets of a given function is the main example, and the cone of all decreasing functions is a particular case. As applications, we obtain conditions for the identity (E₀ ∩ Q,E₁ ∩ Q)_θ,p = (E₀,E₁)_θ,p ∩ Q and interpolation results for operators which are bounded when restricted to a given family of characteristic funcions. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Notiz über den Chloraufschluß niobhaltiger Substanzen

In an investigation on the decomposition of oxide minerals containing Ti, Nb, Fe, U and Y mixtures of TiO₂, Nb₂O₅, Fe₂O₃, U₃O₈ and Y₂O₃ have been heated in streaming Cl₂ containing SOCl₂. In order to avoid the formation of NbOCl₃, which is highly disturbing the distribution pattern of the chlorides, the reaction boat was covered with carbon powder. TiCl₄ was absorbed in sulphuric acid; NbCl₅, FeCl₃ and UCl₄ were condensed in the reaction tube and were separated by usual methods; YCl₃ remained in the reaction boat.     

Eine Vereinfachung des hyperbolischen Parallelenaxioms

Ohne Zusammenfassung     

Reversible phase transitions in emulsified nanostructured lipid systems

Aqueous submicron-sized dispersions of the binary monolinolein/water system, which are stabilized by means of a polymer, internally possess a distinct nanostructure. Taking this as our starting point, we were able to demonstrate for the first time that the internal structure of the dispersed particles can be tuned by temperature in a reversible way. Upon increasing the temperature, the internal structure undergoes a transition from cubic via hexagonal to fluid isotropic, the so-called L2 phase, and vice versa. Intriguingly, in addition to the structural changes in topology, the particles expel (take up) water to (from) the aqueous continuous phase when increasing (decreasing) the temperature in a reversible way. At each temperature, the internal structure of the dispersed particles corresponds very well to the structure observed in nondispersed binary monolinolein with excess water. This agreement is independent of any thermal history (including phase transitions), which proves that the structures in the dispersed particles actually are in thermodynamic equilibrium with the surrounding water phase.     

On the influence of electric currents on plastic deformation

Electromagnetic sheet metal forming (EMF) is a high-speed forming process driven by the dynamics of a coupled electromagneticmechanical system. The purpose of the current work is the investigation of a possible reduction in the yield stress due to electric currents. While thermoelastic and viscoplastic effects are well-understood, the possible influence of electric currents on dislocation motion, generally referred to as the electro-plastic effect [3], is still an unresolved issue. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)