Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBroad-Line Proton Magnetic Resonance Spectra of Dichloro (1,2,4-triazole) copper (II) and Bis (1,2,4-triazolato) copper (II)Motomichi Inoue and Masaji KuboCite this: Inorg. Chem. 1966, 5, 1, 70–73Publication Date (Print):January 1, 1966Publication History Published online1 M…
Abstract Summarizing investigations on the solubility, nucleation and growth of NaCl in presence of K 4 Fe(CN) 6 are reported. Raising the contents of K 4 Fe(CN) 6 induces at first the formation of cubes, then skeletal forms and finally suppression of nucleation and growth for the duration of the experiment. Secondary…
Stress corrosion in titanium is caused by complex oxidation reactions. Reaction products were identified by X-ray diffraction, mass spectrometry, and gas chromatography. Chlorine gas was identified as an intermediate and regenerable reaction product that has a strong tendency to crack titanium. No reaction occurs if o…
The thermal behaviour of the two crystalline forms of germanium dioxide has been investigated by differential thermal analysis. Small amounts of lithium increase the rate of transformation. The enthalpy and entropy of transformation have been estimated as 5·05 ± 0·6 kcal. mole–1 and 3·9 ± 0·5 e.u., and the enthalpy of…
The thermal decomposition of iron(II), cobalt(II), and nickel(II) hydroxides has been investigated; kinetic parameters were obtained by isothermal and non-isothermal methods. The activation energies for the decomposition lie within the range 17–26 kcal./mole, in good agreement with values reported for the structurally…
The crystallization of calcium chloro‐ and chloro‐fluoroapatites from calcium halide fluxes was studied as a function of composition and heating schedules. Activation of was investigated by varying phosphor stoichiometry and firing methods. The results indicate that flux‐grown apatites are slightly deficient in and th…
A variety of linear tetrapyrrolic systems is described, all of which fail to yield macrocyclic compounds under conditions in which porphyrins are obtained from the appropriate 1,19-dideoxybiladienes-ac. The tetrapyrrolic compounds prepared include 5,5-bi-(dipyrromethenyls) for which several new synthetical routes are…
Abstract Die folgende Arbeit befaßt sich mit dem Ultrarotspektrum des Ferroelektrikums NaNO 2 , dessen Phasenübergang bei 163°C ein Order‐Disorder Übergang ist. Wir haben das Reflexionsspektrum im Bereich der äußeren UR‐aktiven Gitterschwingungen (30 bis 150 μm,) gemessen, und zwar für Polarisationsrichtungen des elek…
The thermal decomposition of borine carbonyl has been carried out in the presence of triethylamine, a very suitable scavenger of borine (BH3). The bimolecular reaction does not compete with the unimolecular rupture of the B–C bond. At 0°, the pressure-dependence of the unimolecular rupture has been studied, kunimol be…
The characteristics of the residual band at 3650 cm–1 in the infra-red spectrum of deuterated aerosils have been determined. The band corresponds to hydroxyl groups and not to molecular water. It is assigned to interacting hydroxyls sited on neighbouring silicon atoms within the solid lattice of the silica particles.…
Monohydroperoxides were isolated from chlorophyll-photosensitised oxidation of methyl oleate, methyl linoleate, methyl linolenate, and ethyl arachidonate. The positions of the hydroperoxide substituent were determined by two methods of analysis of the saturated hydroxy-esters formed by catalytic hydrogenation. Gas–liq…
Cobalt oxalate dihydrate dehydrated at 150° is porous, and the subsequent isothermal decomposition in a vacuum to cobalt differs considerably from the isothermal decomposition of the anhydrous oxalate prepared at a higher temperature. The characteristic feature of the decomposition of the porous anhydrous cobalt oxala…
Abstract The anisotropic resistivity of dislocations produced by deformation is measured in high purity Au, Ag, and Cu single crystals at liquid helium temperature. Resistivities along the direction perpendicular to the slip plane are found to be greater than those parallel to the slip plane. The ratio Δ ϱ⟂ /Δ ϱ∥ (whe…
Prepolished strips of Ti-8Al-1Mo-1V, stressed to the yield point at 650 F, cracked when exposed to either chloride, iodide, or bromide salts. Cracking was most severe in specimens exposed to pure sodium chloride (NaCl). Chemical analyses of corrosion products formed by NaCl exposures showed that aluminum was preferent…
apparently requires four stages of decomposition to reach . Based on thermogravimetric studies the intermediate products appear to be , , and . Although the first three stages seem irreversible, they too come to a steady state in decomposition, but no recombination takes place. and values have been calculated for the…
The electronic spectra and magnetic susceptibilities of the complexes [UCl6]2–, [UCl4Br2]2–, [UBr6]2–, [UCl4(Ph3PO)2], [UCl4(Et3PO)2], and [UBr4(Ph3PO)2] have been measured. Relative values for the nephelauxetic effects, and the ligand fields, of the ligands have been derived. The possibility of spin-pairing in uraniu…
Abstract A theory is developed which accounts for the fine structure of electron diffraction spots due to the presence of imperfections of different types in thin foils. The method consists essentially of considering the diffraction pattern to result from the image (i.e. from the amplitudes of transmitted and scattere…
The phase diagram of the system Ga‐S has been determined. Two maxima are found in the T‐X diagram, one at the composition of , the other at the composition of . The compound has a maximum melting point of 962° ± 4°C at a sulfur pressure of has a maximum melting point of about 1090°C at a sulfur pressure of 1.3 mm Hg.…
Systemal'ic studies were carried out on the Jormation oj rolling textures in 3% Si-Fe single crystals wilh a number oj Ineselecled orientations.
The C form of La2O3 has been prepared and its transformation to the A form is found to take place at ∼590°C. The C→A transformation of Nd2O3 takes place at 550°C. The temperatures as well as the energies of activation of the phase transformations of the rare earth sesquioxides vary with the size of the cation. Y2O3 un…