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Paired valence

The classic HLSP-PP-VB (Heitler-London-Slater-Pauling perfect-pairing valence-bond) formalism and its chemical applications are described by L. Pauling, The Nature of the Chemical Bond. 3rd edn. (Ithaca, NY, Cornell University Press, 1960 G. W. Wheland, The Theory of Resonance (New York, John Wiley, 1944) and H. Eyring, J. Walter, and G. E. Kimball, Quantum Chemistry (New York, John Wiley, 1944). [Pg.354]

In 1925, Wolfgang Pauli gave chemists what they wanted from the physicists a physical principle underlying electron-pair valency. Pauli built on the fact that in addition to the continuous, line, and band spectra, there is a fine structure of doublets, triplets, and multiple lines, some of which are split in a magnetic field (Zeeman effect). [Pg.248]

Only a few speculations concerning the mechanism of the hydrohalogenation reactions can be found in the literature. They are mostly based on the better knowledge of the reverse reaction, the decomposition of haloalkanes. It seems evident that catalytic hydrohalogenation must also involve transfer of paired valence electrons and that a free radical-like process is highly improbable. The existence of 7r-complex intermediates has been suggested [321,336,337] but the hypothesis lacks experimental evidence. [Pg.333]

Paired valence electrons are relatively stable. In other words, they usually do not form chemical bonds with other atoms. For this reason, electron pairs in an... [Pg.186]

Nonbonding pair Two paired valence electrons that don t participate in a chemical bond and yet influence the shape of the molecule. [Pg.212]

The reactivity of carbon-centered free radicals results from dieir drive to achieve an octet electronic configuration, which they do by two principal reaction processes. The first is atom transfer. This process is one in which an atom with one electron is transferred from a closed-shell molecule (fully paired, valence octets) to the free radical. [Pg.273]

Gas Phase Electron Affinities of DNA Bases and Base pairs (Valence and Diffuse States)... [Pg.588]

Valence crystals are formed by combinations of atoms of the lighter elements in the middle column of the periodic table, such as diamond and silicon carbide. These crystals conform to valence rules, and the interatomic bonds are due to the sharing of electron pairs. Valence crystals are characterized by very great hardness, poor cleavage, and poor electrical conductivity. [Pg.3]

Singlet dioxygen in biological systems is highly selective 2 is umeactive with most organic functional groups (e.g. saturated a bonds, simple alkenes, and carbonyl groups). In part, this is due to its limited lifetime (2 ts in H2 , 58 ps in H2 , 16 ps in DMF, 65 ps in MeCN, and 610 ps in d -MeCN), to its paired valence-electton shell, and to its... [Pg.3480]

Framework atoms in cluster Vertices in parent polyhedron Framework electron pairs Valence electrons (boranes) Valence electrons (transition metal clusters) ... [Pg.664]

Lewis and valenceA Lewis structure shows the valence electrons in a molecule. Two shared electrons form a structures single bond, with correspondingly more for multiple bonds. Some atoms may also have nonbonding electrons (lone-pairs). Valence structures show the bonds simply as lines. [Pg.69]

The electron-dot symbol or electron-dot structure of an element shows the valence electrons as dots. Electrons that are paired in an orbital are shown as a pair of dots, and unpaired electrons are shown as single dots. The paired valence electrons are called lone pairs (because they do not participate in bonding). In an electron-dot symbol, the lone pairs and the single dots are arranged to the right, left, top, and bottom of the element s symbol. The electron-dot symbol for fluorine can be drawn with the single dot in any of the four positions ... [Pg.450]

Lone pairs. Valence electrons that are not involved in covalent bond formation. (9.4)... [Pg.1047]

Eor example, water (H2O) has two bonded and two lone pair valence electrons about the central atom, oxygen. Its electronic geometry, determined by four total groups, is tetrahedral, and its molecular geometry (meaning the El-O-El shape) is bent. Similarly, the NEl3 molecule has three... [Pg.815]

Atoms in Cluster Vertices in Parent Polyhedron Framework Electron Pairs Valence Electrons (Boranes) Closo Nido Arachno Examples Valence Electrons (Transitlon-Metal Clusters) Closo Nido Arachno Examples ... [Pg.608]


See other pages where Paired valence is mentioned: [Pg.191]    [Pg.106]    [Pg.107]    [Pg.109]    [Pg.36]    [Pg.152]    [Pg.153]    [Pg.713]    [Pg.59]    [Pg.35]    [Pg.150]    [Pg.382]    [Pg.59]    [Pg.87]    [Pg.196]    [Pg.156]    [Pg.477]    [Pg.206]    [Pg.106]    [Pg.107]    [Pg.109]    [Pg.305]    [Pg.522]    [Pg.147]    [Pg.604]    [Pg.713]    [Pg.141]   
See also in sourсe #XX -- [ Pg.59 , Pg.60 , Pg.61 , Pg.61 , Pg.79 , Pg.92 ]




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Atomic orbitals valence-shell electron-pair

Carbon dioxide valence shell electron pair

Chemical bond valence shell electron-pair repulsion

Complexes valence shell electron pair repulsion

Covalent bonding valence shell electron pair repulsion

Covalent bonds valence shell electron pair

Electrons valence-shell electron-pair

Electrons valence-shell electron-pair repulsion

Five electron pair valence shells

Generalized valence bond perfect pairing

Hybridization valence shell electron pair

Lewis structure valence-shell electron-pair repulsion

Lewis structure valence-shell electron-pair repulsion theory

Lewis structures valence shell electron pair

Lone pair valence

Mixed-valence iron pairs

Models and theories valence-shell electron-pair repulsion

Molecular Geometry The Valence Shell Electron Pair Repulsion Model

Molecular geometry and the valence-shell electron pair repulsion model

Molecular geometry orbitals Valence-shell electron-pair

Molecular geometry valence shell electron pair

Molecular geometry valence-shell electron pair repulsion theory

Molecular geometry valence-shell electron-pair repulsion

Molecular orbitals valence shell electron-pair

Molecular structure valence-shell electron-pair

Octahedral complexes valence shell electron pair repulsion

Orbitals and electron pairing in valence-bond theory

Paired-Permanent-Determinant Algorithm for Nonorthogonal Valence Bond Method

Perfect Pairing , in generalized valence

Perfect Pairing , in generalized valence bond methods

Repulsive force valence shell electron pair

Resonance valence-shell electron-pair repulsion

Shape valence shell electron pair repulsion

Six Electron Pair Valence Shells

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

Structures with Five Valence Electron Pairs

Tetrahedral complexes valence shell electron pair repulsion

The Shapes of Molecules Valence Shell Electron-Pair Repulsion Theory

The Valence Shell Electron Pair Repulsion (VSEPR) model

The Valence Shell Electron Pair Repulsion model

VSEPR (valence shell electron-pair

VSEPR theory (valence shell electron pair

Valence Shell Electron Pair

Valence Shell Electron Pair Repulsion

Valence Shell Electron Pair Repulsion VSEPR)

Valence Shell Electron Pair Repulsion analogies

Valence Shell Electron Pair Repulsion method

Valence Shell Electron Pair Repulsion model Group 15 elements

Valence Shell Electron Pair Repulsion molecular shapes

Valence Shell Electron-Pair Repulsion VESPR)

Valence Shell Electron-pair Repulsion VSEPR) model

Valence Spanning Electron Pair

Valence alternation pairs

Valence alternation pairs-the example of selenium

Valence bond theory spin-coupled pairs

Valence electrons molecules with lone pairs

Valence electrons pair repulsion theory

Valence electrons, 2, 3 (Table unshared electron pairs

Valence long pair

Valence pair function

Valence shell electron pair domain

Valence shell electron pair repulsion and molecular geometry

Valence shell electron pair repulsion approach

Valence shell electron pair repulsion bent geometry

Valence shell electron pair repulsion bonding models

Valence shell electron pair repulsion electronic geometry

Valence shell electron pair repulsion linear geometry

Valence shell electron pair repulsion lone pairs effect

Valence shell electron pair repulsion model

Valence shell electron pair repulsion model repulsions

Valence shell electron pair repulsion octahedral geometry

Valence shell electron pair repulsion predicting molecular geometries with

Valence shell electron pair repulsion predicting molecular structure using

Valence shell electron pair repulsion rule

Valence shell electron pair repulsion separation

Valence shell electron pair repulsion tetrahedral geometry

Valence shell electron pair repulsion theory

Valence shell electron pair repulsion theory VSEPR)

Valence shell electron pair repulsion trigonal planar geometry

Valence shell electron pair repulsion trigonal pyramidal geometry

Valence shell electron-pair VSEPR model

Valence shell electron-pair repulsion effectiveness

Valence shell electron-pair repulsion model. See

Valence shell electron-pair repulsion multiple bonds

Valence shell electron-pair repulsion predicting molecular structure

Valence shell electron-pair repulsion structural effects

Valence shell electronic pair repulsion

Valence-Shell Electron-Pair Repulsion predicting molecular shape

Valence-shell electron pair repulsion theor

Valence-shell electron pair repulsion, and

Valence-shell electron-pair basis

Valence-shell electron-pair multiple bonds

Valence-shell electron-pair repulsion VSEPR) method

Valence-shell electron-pair repulsion VSEPR) rules

Valence-shell electron-pair repulsion application

Valence-shell electron-pair repulsion basis

Valence-shell electron-pair repulsion bonds

Valence-shell electron-pair repulsion concept

Valence-shell electron-pair repulsion covalent bond

Valence-shell electron-pair repulsion defined

Valence-shell electron-pair repulsion linear arrangement

Valence-shell electron-pair repulsion model lone pairs

Valence-shell electron-pair repulsion model pairs

Valence-shell electron-pair repulsion molecules with multiple central atoms

Valence-shell electron-pair repulsion octahedral arrangement

Valence-shell electron-pair repulsion predictions

Valence-shell electron-pair repulsion shells

Valence-shell electron-pair repulsion square planar shape

Valence-shell electron-pair repulsion tetrahedral arrangement

Valence-shell electron-pair repulsion theory description

Valence-shell electron-pair repulsion theory geometry, central atom

Valence-shell electron-pair repulsion theory orbital hybridization

Valence-shell electron-pair repulsion trigonal bipyramidal arrangement

Valence-shell electron-pair repulsion trigonal planar arrangement

Valence-shell electron-pair repulsion trigonal pyramidal

Valence-shell electron-pair theory)

Water valence shell electron pair

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