Die gasförmigen Komplexe NiAl2Cl8 und NiAl3Cl11

Gaseous Complexes NiAl₂Cl₈ and NiAl₃Cl₁₁ Spectral photometric measurements of equilibria which are established by reaction of solid NiCl₂ with gaseous Al₂Cl₆ have been made. Results see ?Inhaltsübersicht”?.     

Die Reaktion von Quarzglas mit Al2Cl6,g und mit Alrf + Al2Cl6,g

Reaction of Quartz Glass with Al₂Cl_6,g and with Al,_f + Al₂Cl_6,g The attack of quartz glass by Al₂Cl_6,g at temperatures ≧ 300°C results in the formation of SiCl_4,g. At low temperature the oxygen appears as gaseous oxide chloride (e. g. Al₄OCl₁₀…); above 300°C crystalline AlOCl is observed, whereas at more elevated temperatures Al₂O₃ is formed. With Al + Al₂Cl₆ (1 atm, 20°C) at 400/350°C thin silicon foils with metallic luster deposit on the quartz wall. Discussion of the experimental evidence leads to the suggestion that the reduction of SiCl₄ — formed initially by attack of the quartz vessel — proceeds by reaction with Al₂Cl_4,g.     

Die Bildung von Ammoniak bei biochemischen Umsetzungen

Ohne Zusammenfassung     

Die Störung durch kleine Wassergehalte bei der Messung der Dissoziationsenthalpie von Ga2Cl6 = 2 GaCl3

Disturbance by Small Water Contents during the Measurement of the Dissociation Enthalpy of Ga₂Cl₆ = 2 GaCl₃ Small water contents are difficult to exclude before the dissociation of Ga₂Cl₆ is studied. Taking into account the small amount of HCl, which arises from that, the values ΔH°(298) = 22.49 kcal and ΔS°(298) = 35.95 cal/K are obtained using ΔCp = ?4 cal/K we got for Ga₂Cl_6,g = 2 GaCl_3,g.     

Die Bildung von cyclischen Oligomeren bei der Oxetan-Polymerisation

Ohne Zusammenfassung     

Hochdrucksynthesen von Carbonaten. V. Carbonatdarstellungen durch Schmelzreaktionen unter hohen CO2-Drücken

High Pressure Syntheses of Carbonates. V. Syntheses of Carbonates by Melt Reactions under High CO₂ Pressure Binary compounds of transition metals react in melts of Tl₂CO₃ under CO₂ pressure from 1 000 to 5 000 bar by giving ternary carbonates. By this the compounds Tl₂Cu(CO₃)₂, TlCr(CO₃)₂, Tl₃Cr(CO₃)₃, and Tl₃V(CO₂)₃ could be prepared. The structure of Tl₂Cu(CO₃)₂ contains Cu₂ groups (a₀ = 7.583 Å, b₀ = 9.799 Å, c₀ = 9.119 Å, β 111.51°, Z = 4, space group P2₁/c Nr. 14). The space group of TlCr(CO₃)₂ is also P2₁/c Nr. 14 (a₀ = 19.917 Å, b₀ = 8.605 Å, c₀ = 19.138 Å, β = 104.79°, Z = 24). The compounds too were characterized by infrared spectroscopy.     

Die Bildung von Liesegang'schen Ringen durch Azotobakter bei O2-Hemmung

Ohne Zusammenfassung     

Die Netzstruktur von RbNb4Cl11

The Network Structure of RbNb₄Cl₁₁ RbNb₄Cl₁₁ was obtained by solid state reaction of Nb powder, NbCl₅ and RbCl at 575 °C. The structure was examined by powder and single‐crystal X‐ray diffraction. RbNb₄Cl₁₁ crystallizes with the space group Pmma (No. 51), Z = 2 , a = 1621.1(1) pm, b = 690.22(4) pm, c = 657.93(3) pm, R₁ = 0.0257 and wR₂ = 0.0470, being isotypic with CsNb₄Cl₁₁. The structure contains edge bridging and face sharing [NbCl₆] octahedra forming the motif of a wave‐like net. The net‐planes are stacked parallel to the c axis direction. Rubidium ions occupy voids between the net openings of adjacent layers. The electronic properties of Nb₄‐clusters in the structure are being discussed.