Silver hydride

Isotope Effects on Superconductivity. Substitution of hydrogen by deuterium affects the superconducting transition temperature of palladium hydride [26929-60-2] PdH2 (54,55), palladium silver hydride, Pd Ag H D ( 6), and vanadium—2itconium—hydride, N(57). 

The existence of a stoichiometric solid silver hydride remains doubtful, but evidence has been obtained for a gaseous silver hydride (AgH).383,384 Silver hydride species have been postulated in the reaction mechanism of oxidations involving gaseous hydrogen with silver salts present as catalysts.385... 

Sarkar A, Janata E. (2007) Formation of the silver hydride ion AgH+ upon the reduction of silver ions by H" in aqueous solution. A pulse radiolysis study. Z Phys Chem 221 403 13. 

Extending previous accurate laser studies of the IR spectra of metal hydrides in gas phase, including NaH, CsH, BaH, SrH, RbH, GaH, InH, TIH CdH, ZnH, KH, MgH, CaH and LiH and also of diatomic hydride radicals, for instance SnH, NiH, FeH, CoH and GeH, the infrared spectra of two isotopic forms of silver hydride [ Ag (51.35%) and Ag (48.65%)] in its ground electronic state ( S) have been recorded . Accurately known absorption hnes of nitrogen dioxide sulphur dioxide and formaldehyde served for wavenumber calibration 21 transitions in the bands from v=l -0uptov = 3 2 have been measured for AgH and AgH respectively, their assignments and equation wavenumbers were presented explicitly and fitted to the Dunham expression (equation 38) for the energy levels of diatomic molecules, and the parameters Yij for two isotopic forms of AgH were determined. ... 

The new data permitted one to obtain a new value of the equihbrium bond length of the AgH, which was found to be Vg = 1.617798 (5) A. The expected Ag/ Ag isotope effect in the effective bond length of AgH isotopomers, caused by the anharmonicity of the Ag—H vibrations, is not discussed by Birk and Jones as was done in the case of C—H/C—D bond distances and vibrations. Subsequently, AgD was obtained from silver vapour with deuterium and 33 transitions have been recorded for AgD and AgD. As before, the rovibrational spectra have been fitted to the Dunham expression in equation 38 and the parameters Yij of two isotopic AgD species were determined, when Tio was found to equal 1250.8912(15) for AgD and 1250.676(30) for AgD. The particular values of Y are greater for the hghter isotope species as required by equation 39, in which p and p are reduced masses of the two molecules. The values of Tio in silver deuterides are smaller by a factor of 1.407 than the Tio values for silver hydrides. The mean amphtudes of vibrations of Ag—D and Ag—H stretches and the isotope effects on the size of isotopic Ag H molecules have not been presented in... 

Note Since this article was written, a number of other studies have appeared on the generation and reactions of gas phase reactive metallic species, including the use of decarboxylation reactions to produce organometallic ions (105-107] and the lithium acetate enolate anion (108j silver and silver hydride cluster ions (109) gold carbenes [110, 111] and metal-oxo cations 112]. 

The silver hydride diatomic molecule, Ag H, has an internuclear bond distance of 1.617 A. Predict the energies, in joules, of its first four rotational levels. (Use / = ixi. )... 

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