Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Metallic character geometric

From that work, it became clear that the metallic character of the infinite chain heavily depended on geometrical parameters an alternating chain being semi-conductive. [Pg.1021]

J. Riley relates geometric and electronic properties of copper(II) compounds. Finally, Hartmut Yersin and Dirk Donges explain on the basis of case studies, the ways in which photophysical properties of organometallic and related compounds depend on the metal character of the low-lying electronic states and how these properties can be tuned by chemical variation. [Pg.195]

Geometrical considerations about intermetallic crystal structures. When discussing the factors which control the structures of the metallic elements, Laves (1956) proposed three interrelated principles that are mainly geometric in character and also related to the atomic dimensional characteristics ... [Pg.254]

It should also be noted that in the Pauling theory of metals, from which the concept of per cent d-character of metallic bonding is derived, this property is itself a function of the interatomic distance in the metal this illustrates one of the difficulties in distinguishing between the influence of electronic and geometric factors on the catalytic properties of metals. [Pg.331]

In an enzyme the metal atom (or other attacking group) can be put into a geometric or electronic state so as to enhance its acidity (e.g., zinc in carbonic anhydrase). The energization is connected to the fold of the protein and thus fold changes, small in character, can modulate the... [Pg.99]

Spectroscopies are also used to experimentally probe transient species along a reaction coordinate, where often the sample has been rapidly freeze quenched to trap intermediates. An important theme in bioinorganic chemistry is that active sites often exhibit unique spectroscopic features, compared to small model complexes with the same metal ion.8 These unusual spectroscopic features reflect novel geometric and electronic structures available to the metal ion in the protein environment. These unique spectral features are low-energy intense absorption bands and unusual spin Hamiltonian parameters. We have shown that these reflect highly covalent sites (i.e., where the metal d-orbitals have significant ligand character) that can activate the metal site for reactivity.9... [Pg.1]


See other pages where Metallic character geometric is mentioned: [Pg.85]    [Pg.888]    [Pg.66]    [Pg.256]    [Pg.210]    [Pg.403]    [Pg.217]    [Pg.188]    [Pg.66]    [Pg.24]    [Pg.623]    [Pg.395]    [Pg.506]    [Pg.512]    [Pg.532]    [Pg.537]    [Pg.558]    [Pg.281]    [Pg.83]    [Pg.316]    [Pg.262]    [Pg.9]    [Pg.361]    [Pg.138]    [Pg.753]    [Pg.27]    [Pg.18]    [Pg.82]    [Pg.234]    [Pg.5]    [Pg.382]    [Pg.169]    [Pg.79]    [Pg.804]    [Pg.61]    [Pg.61]    [Pg.62]    [Pg.156]    [Pg.244]    [Pg.270]    [Pg.282]    [Pg.141]    [Pg.189]    [Pg.119]   
See also in sourсe #XX -- [ Pg.4 ]




SEARCH



Metallic character

© 2024 chempedia.info