Untersuchungen über den Salzcharakter des Lithiumhydrids

Moers, K.

doi:10.1002/zaac.19201130116

Cited by 58 publications

(14 citation statements)

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“…In the first class hydrides are formed easily and are solids with the properties of real salts, as Moers has found (51). In the first class hydrides are formed easily and are solids with the properties of real salts, as Moers has found (51).…”

Section: Fiq 3 Periodic System Of the Elements Basedmentioning

confidence: 97%

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The Mechanism of Heterogeneous Catayltic Organic Reactions. I. Catalytic Hydrogenation.

Schmidt¹

1933

Chem. Rev.

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The process of catalytic hydrogenation of organic compounds is of great interest, not only industrially but also scientifically.It comprises the hydrogenation of fatty substances, the hydrogenation of carboxides with formation of methanol, and a host of other important chemical processes. I n order to master these reactions the most important step is to understand their mechanism.I n hydrogenating fatty oils one or more double bonds between carbon atoms are converted into single bonds ; in hydrogenating carboxides one or more double bonds between carbon and oxygen atoms are reduced. This seems to be a close analogy; nevertheless the mechanism of the two processes is probably quite different, as we shall see later.We consider first the mechanism of the hydrogenation of multiple carbon bonds. For a long time I have adhered to the theory (1) that catalytic hydrogenation of multiple carbon bonds belongs to the great class of catalytic reactions that are produced by ions. I am glad now to have the opportunity of surveying the facts which seem to me to prove that ionic catalysis is involved in this type of hydrogenation.But first, what is ionic catalysis? Ostwald (2) and Arrhenius (3) were the first to find that ions 1 This is the first of a series of three articles. 11, The Dissociation of Carbon Bonds, is scheduled for publication in

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Section: Fiq 3 Periodic System Of the Elements Basedmentioning

confidence: 97%

“…Table 3 gives the values of the ionic radii, using the figures of Goldschmidt, (G), (51) and Pauling, (P), (52). Because the alkali metals are univalent, the charge on their ions is only 1; their radius is large and therefore the force of the electric field, F , is weak.…”

Section: T1 (25)mentioning

confidence: 99%

The Mechanism of Heterogeneous Catayltic Organic Reactions. I. Catalytic Hydrogenation.

Schmidt¹

1933

Chem. Rev.

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“…Measurements of the heat capacity of silicon have been reported by Russell [ 37 ] (-191°to 46°C) , Dewar [9] (20°to 80°K) , Nernst and Schwers [33] Kelley and King [20], using the data reported by Anderson [l], Nernst and Schwers [33], and Pearlman and Keesom [34] > calculated SRgg = 4*51 ±0.05 eu. Flubacher, Leadbetter, and Morrison [12] calculated 0°^,^= 4*497 ±0.009 eu from their data.…”

Section: Beryllium-titanium Systemmentioning

confidence: 99%

“…The heats of solution of Li(c) and LiH(c) have been measured by Messer, et al [32], Gunn and Green [33], Moers [34], and Guntz [35], yielding AHf = -21.34, -21.67, -21.60, and -21.61 kcal, respectively.…”

Section: Lih(c)mentioning

confidence: 99%

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Preliminary report on the thermodynamic properties of selected light-element and some related compounds:

1962

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This is the seventh semi-annual report on the current experimental, theoretical, and evaluative program, at the National Bureau of Standards, on the thermodynamic properties of selected light-element compounds of primary interest in high-temperature research. In this connection the chemical elements principally involved are H, Li, Be, B, C, N, 0, F, At, Cl, and Zr, with more secondary interest in the compounds of Mg, Si, K, Ti, Br, I, W, Hg, and Pb. The emphasis in the NBS work has been on the simpler compounds of these elements.This report includes some recent NBS measurements under the program: The heat of formation of nitronium perchlorate, and the high-temperature heat capacity of aluminum carbide. As discussed in the report, precise measurements are essentially completed on the heat of combustion of aluminum in fluorine and on the low-temperature heat capacities and absolute entropies of LiH, and LiAlH^; however, these data are not yet presented, pending the resolution of small discrepancies needed to put the results on a final basis. Tables of thermodynamic functions are given for four gases omitted from earlier reports (H 2 > 02> H , and electron gas), and, on the basis of improved data, for the condensed phases of two substances (BeF 2 and At^C^) . A contribution from those areas in which elaborate apparatus development is still progressing is a description in the report of a new fast-opening large-aperture shutter for high-speed photography. This development will be important in the study of combustions at very high temperatures and pressures.Also included are several up-to-date literature surveys in the field.One describes recent additions to the literature on the chemistry of numerous light-element compounds. A second describes alloys and intermetallic compounds of aluminum and beryllium with titajaium and zirconium; while a third survey covers low-temperature heat capacities aud entropies of various substances, particularly the oxides of eight light elements. The fourth report is a comprehensive and critical assembly of the available values for the heats of formation of a large number of compounds. IntroductionNitronium perchlorate is a v;hite, crystalline material, stable at temperatures up to 120°C. It is extremely hygroscopic, reacting rapidly with water to form nitric and perchloric acids. Aqueous solutions of potassium hydroxide were used in this investigation, as the potassium salts of the acids provided more suitable reference substances. The heats of solution of KN0_(c) and KClO/c) in KOH(aq) were also determined. Constants and Conversion FactorsThe results of this investigation are given in joules and calories, with 1 cal = 4*1840 joules. All weights are corrected to vacuum. The molecular weights are calculated from the 1957 International Table of Atomic Weights [l]. For N02C10/(c) an estimated heat capacity of 36 cal/deg mole was used; other auxiliary data were taken where possible from [2].3. MaterialsThe KNO^(c) and KC10/(c) were reagent-grade materials, dried at 120°...

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Primary Solid Hydrides

Gibb

1962

Progress in Inorganic Chemistry

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Untersuchungen über den Salzcharakter des Lithiumhydrids

Abstract: 1. Es wurde eine Methode zur bequemen Darstellung von reinem Lithiumhydrid nebst Analyse ausgearbeitet und einige allgemeine Eigenschaften der Substanz untersucht.

Cited by 58 publications

References 8 publications

The Mechanism of Heterogeneous Catayltic Organic Reactions. I. Catalytic Hydrogenation.

The Mechanism of Heterogeneous Catayltic Organic Reactions. I. Catalytic Hydrogenation.

Preliminary report on the thermodynamic properties of selected light-element and some related compounds:

Primary Solid Hydrides

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