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Structure valency

Lewis s theory also fails to account for the compound diborane, B2H6, a colorless gas that bursts into flame on contact with air. The problem is that diborane has only 12 valence electrons (three from each B atom, one from each H atom) but, for a Lewis structure, it needs at least seven bonds, and therefore 14 electrons, to bind the eight atoms together Diborane is an example of an electron-deficient compound, a compound with too few valence electrons to be assigned a valid Lewis structure. Valence-bond theory can account for the structures of electron-deficient compounds in terms of resonance, but the explanation is not straightforward. [Pg.238]

Valence of counterion out and effect on water structure) Valence T —> swelling 4-... [Pg.562]

New Materials There is increasing interest in the design of new catalysts by using principles of molecular architecture. This involves the engineering of such properties as structure, valence, electronegativity, or redox potential of... [Pg.8]

Pearce, P.L. (1991a) Travel stories An analysis of self-disclosure in terms of story structure, valence, and audience characteristics. Australian Psychologist 26 (3), 172-174. [Pg.223]

Bonino s lecture met with success and gained a nod of approval from various colleagues, including Walter Hiickel, the brother of Erich. [72] Furthermore, Bonino renewed his friendship with Peter Debye and formed an acquaintance with Richard Kuhn, the president of the German Chemical Society. Nevertheless, in Paris he only touched upon the relationships between structure, valency, stereochemistry and the concept of symmetry. He took these arguments into deeper consideration the following year on a different occasion in Germany. [Pg.92]

Ionic VB Structures Valence bond structures that involve oppositely charged centers. For example, the description of an electron pair bond A—B requires a covalent HL structure, A - B, and two ionic structures, A+ B and A - B +. ... [Pg.308]

In the development of the TURTLE program [3], we started by considering a multi-structure Valence Bond wavefunction and added the capability to optimise the orbitals. We tried to avoid putting restrictions on the way the wavefunction is built and to allow great flexibility in the choice of orbitals. For... [Pg.79]

Meanwhile in Chemistry the Heisenberg Hamiltonian, which is known as the (covalent-structure) valence-bond (VB) model, has also been applied to conjugated systems. Therefore, some parallelism can be established between ladder materials and long conjugated polymers. [Pg.730]

This formula allows to tackle a number of different problems concerning the relation of crystal structure, valence electron number, and basic structure type as given in [15]. The basic defect-free structure type to the compound AaB(,D[Pg.471]

We now turn from the use of quantum mechanics and its description of the atom to an elementary description of molecules. Although most of the discussion of bonding in this book uses the molecular orbital approach to chemical bonding, simpler methods that provide approximate pictures of the overall shapes and polarities of molecules are also very useful. This chapter provides an overview of Lewis dot structures, valence shell electron pair repulsion (VSEPR), and related topics. The molecular orbital descriptions of some of the same molecules are presented in Chapter 5 and later chapters, but the ideas of this chapter provide a starting point for that more modem treatment. General chemistry texts include discussions of most of these topics this chapter provides a review for those who have not used them recently. [Pg.51]

Composition, heat of adsorption, surface structure Valence band structure... [Pg.27]

Skill 21.2 Apply the concepts of Lewis structures, valence-shell electron-pair repulsion, and hybridization to describe molecular geometry and bonding. [Pg.208]


See other pages where Structure valency is mentioned: [Pg.146]    [Pg.147]    [Pg.156]    [Pg.414]    [Pg.137]    [Pg.240]    [Pg.99]    [Pg.13]    [Pg.38]    [Pg.423]    [Pg.564]    [Pg.99]    [Pg.177]    [Pg.4]    [Pg.27]    [Pg.128]    [Pg.156]    [Pg.169]    [Pg.807]    [Pg.421]    [Pg.2]    [Pg.3]    [Pg.85]    [Pg.128]    [Pg.512]    [Pg.513]    [Pg.391]    [Pg.109]    [Pg.7]    [Pg.30]    [Pg.31]    [Pg.33]    [Pg.35]    [Pg.37]    [Pg.331]   
See also in sourсe #XX -- [ Pg.161 , Pg.165 , Pg.166 , Pg.169 , Pg.170 , Pg.172 ]




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Allyl radical valence bond structure

Alternating polarity of atoms in valence bond structures

Among several valence bond structures

Atomic structure, organic compounds valence shell electrons

Atoms valence-electron structure variation

Bond valence model structures

Chlorine, valency structures

Crystal structure halide valency

Electronic structure halide valency, solids

Electronic structures valence levels

Enumeration of Kekule Valence Structures

Ethylene valence bond structure

Extended structures valence

Formal Valence Bond Structures

Four Valence Orbitals of Pentacoordinated Structure

Generating a Set of Valence Bond Structures

Increased-Valence Structures Some General Comments

Increased-Valence Structures for N2O and

Increased-Valence Structures with three 2-Centre Bond Orbitals

Increased-valence structure

Increased-valence structure approximation

Kekuld valence-bond structures

Kekule Valence Structures Weights

Kekule valence structures

Kekule valence-bond structure

Lewis structure expanded valence shells

Lewis structure valence-shell electron-pair repulsion

Lewis structure valence-shell electron-pair repulsion theory

Lewis structures valence shell electron pair

Lewis structures valence shells

Methane valence bond structure

Method of Increments Valence-band Structure and Bandgap

Mixing of Degenerate Valence Bond Structures

Molecular Structure Using Valence Bond Concepts

Molecular structure valence

Molecular structure valence bond method

Molecular structure valence electrons

Molecular structure valence-shell electron

Molecular structure valence-shell electron-pair

Optimized structure and valence-electron density of tetragonal ceria-zirconia solid solutions

Oxide valence electronic structure

Paramagnetic Increased-Valence Structures

Pauling 3-Electron Bonds and Increased-Valence Structures

Pauling 3-Electron Bonds and Increased-Valence Structures for

RESONATING VALENCE BOND THEORY molecular structure

Resonance between valence-bond structures

Resonance of Valency Structures Benzene

Resonance of valency structures

Significance of Classical Valence Structures

Skill 1.3c-Predict molecular geometries using Lewis dot structures and hybridized atomic orbitals, e.g., valence shell electron pair repulsion model (VSEPR)

Spin Degeneracy and Wave-Functions for Increased-Valence Structures

Square planar structure valence bond description

Structur increased-valence

Structural Coefficients and Weights of Valence Bond Wave Functions

Structural information from valence-shell PE spectroscopy making assignments

Structure and Valence Spectroscopy

Structures with Five Valence Electron Pairs

The Electronic Structure of Atoms with Two or More Valence Electrons

Using Standard Molecular Orbital Software to Compute Single Valence Bond Structures or Determinants

Valence NaCl structure

Valence NiAs structure

Valence band structure

Valence bands Structure, band tails

Valence bond method, electronic structure

Valence bond orbital structures

Valence bond spin structures

Valence bond structure

Valence bond structure 58 Zeolites

Valence bond structure chemical reactions

Valence bond structure complete active space self-consistent field

Valence bond structure reactions

Valence bond structure systems

Valence bond structures, weights

Valence bond theory Dewar structure

Valence bond theory Kekule structure, benzene

Valence bond theory Kekule structures

Valence bond theory structures

Valence compounds tetrahedral structures

Valence electronic structure

Valence electronic structure, nucleotides

Valence electrons Lewis structures

Valence electrons and Lewis structures

Valence electrons representation in Lewis structures

Valence electrons structure

Valence shell electron pair repulsion predicting molecular structure using

Valence shell electron-pair repulsion predicting molecular structure

Valence shell electron-pair repulsion structural effects

Valence structure index

Valence structures

Valence structures classical

Valence, and electronic structure

Valence-Bond Structures and Quinquevalent Nitrogen Atoms

Valence-bond method ionic structures

Valence-bond structure-resonance theory

Valence-bond structures, linear

Valence-bond structures, linear molecular sizes

Valence-electron structure, vacancy-induced

Valency and Structural Chemistry

Valency structure and

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