Materials Literature
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A model substrate for studies in the hexahydroporphyrin series, i.e. the title compound (1) having C2v symmetry, has been prepared by a multistep de-novo synthesis from a cyanosubstituted thiolactam. Catalytic hydrogenation of (1) affords the highly O2-sensitive 2,3,7,8,15,24-hexahydro derivative; attempts to incorpor…
The susceptibility to selective dissolution of Cd‐Mg alloys in deaerated solutions, at room temperature to 75°C, was studied. The range of compositions studied was Cd‐11 a/o Mg (Cd‐2.6 w/o Mg) to Cd‐50 a/o Mg (Cd‐18 w/o Mg). Between −0.9 and −0.5V (NHE) , selective dissolution of magnesium was found. Cadmium was accum…
Abstract Bismuth tribromide exists in two modifications, α BiBr 3 is stable below and β BiBr 3 above 158°C. α BiBr 3 is monoclinic ( P 2 1 / a ) with a = 842.9(1) pm, b = 984.8(2) pm, c = 675.6(1) pm and β = 109.65(1)°. The structure contains trigonal pyramidal BiBr 3 molecules. Average distances are BiࢤBr = 266 pm (3…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntramolecular electron transfer and valence isomerization in mononuclear nickel-macrocyclic ligand complexes: formation of paramagnetic nickel(I)-carbonyl complexesRobert R. Gagne and D. Michael IngleCite this: J. Am. Chem. Soc. 1980, 102, 4, 1444–1446Publication Date (Prin…
The backscattering from and the implantation of 0.5–10-keV hydrogen and helium in Au is investigated with the MARLOWE and TRIM computer codes. The following are found in this paper: (1) The results of the MARLOWE and the much faster TRIM codes are in satisfactory agreement. (2) The influence of potential parameters an…
Microautoradiography of tritium, observed at the electron microscope scale (SEM or TEM) was used to locate hydrogen trapped in the microstructure of Fe-Cr (50 ppm C) alloys, after cathodic charging. The morphology and behavior of the hydrogen traps depends on the thermal history of the specimens and is strongly relate…
Abstract Thermal gravimetric analysis, differential scanning calorimetry, and derivative thermal gravimetric analysis were utilized to characterize the thermal interactions between cellulose, 1‐6, anhydro β‐D‐glucopyranoside, and D‐glucose and model phosphate and phosphoramide flame retardants. The phosphoramides indu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemistry of dithia-, selenathia-, and diselenaboranesG. Delbert Friesen, Antonio Barriola, Paul Daluga, Polly Ragatz, John C. Huffman, and Lee J. ToddCite this: Inorg. Chem. 1980, 19, 2, 458–462Publication Date (Print):February 1, 1980Publication History Published online1 M…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNitrogen-14 nuclear quadrupole resonance spectra of coordinated pyridine. An extended evaluation of the coordinated nitrogen modelGerald V. Rubenacker and Theodore L. BrownCite this: Inorg. Chem. 1980, 19, 2, 392–398Publication Date (Print):February 1, 1980Publication Histor…
Abstract Man erhält die Substanzen in kristallinerform durch Umsetzung der reinen Alkalimetalle mit den Chalkogenen in flüssigem Ammoniak im Molverhältnis 2:3 bei Drucken bis zu 3000 bar und Temperaturen um 600 K. Sie kristallisieren alle im K 2 S 3 ‐Typ (Raumgruppe Cmc2 1 (Nr. 36)). Ihre Gitterkonstanten lauten: Das…
The general theory of nuclear-spin relaxation induced by translational self-diffusion in liquid crystals developed in a previous paper is applied to the smectic $A$ phase. The inter- and intralayer molecular jumps, the spin distribution, and the elongated shape of the molecules are taken into account. Results are obta…
Abstract Characterization studies on a series of coprecipitated alumina‐supported nickel methanation catalysts by X‐ray photoelectron spectroscopy are described. Binding energies and spectral shapes have been determined for several standard compounds (Ni, NiO, Ni(OH) 2 , NiAl 2 O 4 , Al 2 O 3 ) to provide background i…
Emission and excitation spectra of Eu 2+ ions incorporated in MgS, CaS and CaSe were measured at temperatures 300, 80 and 6 K. Both spectra are interpreted as due to the allowed transition between the Eu 2+ ion's ground state ( 8 S 7/2 ) of 4f 7 configuration and the excited states of 4f 6 5d configuration, together w…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural studies of three tetrakis(carboxylato)dirhodium(II) adducts in which carboxylate groups and axial ligands are variedF. Albert Cotton and Timothy R. FelthouseCite this: Inorg. Chem. 1980, 19, 2, 323–328Publication Date (Print):February 1, 1980Publication History Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthetic methods. 15. Unsaturated acyl derivatives of silicon, germanium, and tin from metalated enol ethersJohn A. Soderquist and Alfred HassnerCite this: J. Am. Chem. Soc. 1980, 102, 5, 1577–1583Publication Date (Print):February 1, 1980Publication History Published online…
Abstract Es wurden Möglichkeiten untersucht, Na 3 PO 4 auf festkörperchemischen Wegen darzustellen. Differentialthermoanalytisch und röntgenographisch ließen sich im untersuchten Temperaturbereich (25–800°C) zwei Modifikationen nachweisen. Die reversible Phasenumwandlung ist 1. Art und erfolgt bei 325°C. Die Kristalls…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThree-carbon annelations. Regiocontrolled reactivity of trimethylsilyl- and ethoxyethyl-protected cyanohydrins. Versatile homoenolate and acyl anion equivalentsRichard M. Jacobson, George P. Lahm, and John W. CladerCite this: J. Org. Chem. 1980, 45, 3, 395–405Publication Dat…
Single-ion luminescence due to Mn 2+ and donor-acceptor pair luminescence due to (Cu, Al), (Ag, Al) and (Au, Al) centered in hexagonal ZnS have been investigated at 75 K with a major focus on exciton structures in the excitation spectra. Appearance of exciton peaks in Mn 2+ luminescence excitation spectra indicates th…
Abstract Molecular structural changes of a vinyl functional silane coupling agent on E ‐glass fibers, induced during the immersion test in hot water, have been studied using Fourier transform infrared spectroscopy. The amount of the coupling agent on the glass fibers is reduced by hydrolytic degradation. Silanol group…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOctakis(alkylthio)tetraazaporphyrinsCharles J. Schramm and Brian M. HoffmanCite this: Inorg. Chem. 1980, 19, 2, 383–385Publication Date (Print):February 1, 1980Publication History Published online1 May 2002Published inissue 1 February 1980https://pubs.acs.org/doi/10.1021/ic5…