Results 281 to 290 of about 1,114,043 (348)
Peroxides of the Group Two Elements of the Periodic Table
, 1966 All elements of the second group, with the exception of beryllium [1], form peroxide compounds. Peroxides of calcium, strontium, and barium belong to the M2+O2 2- type; while peroxides of magnesium, zinc, and cadmium, of general formula MO2 • xH2O, probably belong to the HO—M—OOH type where the covalent bond between the hydroperoxyl group and the metal
I. I. Vol'nov, A. W. Petrocelli
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Walking Down the Chalcogenic Group of the Periodic Table: From Singlet to Triplet Organic Emitters
Chemistry – A European Journal, 2015AbstractThe synthesis, X‐ray crystal structures, ground‐ and excited‐state UV/Vis absorption spectra, and luminescence properties of chalcogen‐doped organic emitters equipped on both extremities with benzoxa‐, benzothia‐, benzoselena‐ and benzotellurazole (1X and 2X) moieties have been reported for the first time.
Adrian Kremer +8 more
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The group VIII platinum-group metals and the Periodic Table
Foundations of Chemistry, 2009The six platinum group metals (pgms: ruthenium, rhodium, palladium, osmium, iridium and platinum) posed a number of problems for 19th-century chemists, including Mendeleev, for their Periodic classification. This account discusses the discovery of the pgms, the determination of their atomic weights and their classification.
W. Griffith
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Group theoretical aspects of the periodic table of the elements
Journal of Molecular Structure: THEOCHEM, 1989Abstract Several attempts to obtain the overall (approximate) symmetry of the periodic system of the elements are discussed. The symmetries are analysed in terms of the prediction of magic numbers in Meyer-Mendeleev's table; this is shown to be a still elusive goal. Other group-theoretical aspects are, however, better understood, such as the roles of
O. Novaro
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Journal of Molecular Structure: THEOCHEM, 1994
The enthalpies of formation of a series of saturated and unsaturated closed-shell silicon-containing compounds have been calculated using various ab initio methods of quantum chemistry adapted to the size of the species under consideration. A large variety of bond energy terms involving the silicon, germanium or tin atom were derived from our ...
Georges Leroy +2 more
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The enthalpies of formation of a series of saturated and unsaturated closed-shell silicon-containing compounds have been calculated using various ab initio methods of quantum chemistry adapted to the size of the species under consideration. A large variety of bond energy terms involving the silicon, germanium or tin atom were derived from our ...
Georges Leroy +2 more
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The periodic table: The 6d-5f mixed transition group
Journal of Chemical Education, 1952With relatively few modifications, the Bohr-type periodic table presented by Glocker and Popov can be made to reflect more instructively the rather complex relationships obtained in the neighborhood of the 4f or gadolinium transition group and, more importantly, in the 6d-5f sequence extending from actinium through the region of uranium and the ...
C. D. Coryell
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Inorganica Chimica Acta, 1990
[No abstract available]
PAOLESSE, ROBERTO +2 more
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[No abstract available]
PAOLESSE, ROBERTO +2 more
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Inorganic Chemistry, 2020
Intermetallic compounds with semiconducting properties are rare, but they give rise to advanced materials for energy conversion and saving applications. Here, we present ReGa2Ge, a new electron-precise narrow-gap intermetallic semiconductor. The compound
M. Likhanov +8 more
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Intermetallic compounds with semiconducting properties are rare, but they give rise to advanced materials for energy conversion and saving applications. Here, we present ReGa2Ge, a new electron-precise narrow-gap intermetallic semiconductor. The compound
M. Likhanov +8 more
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The stereochemistry of sub-group VIB of the periodic table
Quarterly Reviews, Chemical Society, 1956S. Abrahams
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