Results 141 to 150 of about 1,079,430 (204)
Photofragmentation of polyatomic molecules
Journal de Chimie Physique, 1980 Scope of review : brief description of the main experimental and theoretical methods in use for the study of the photofragmentation of polyatomic molecules under collision-free conditions when the primary step is due to a single photon absorption leading to either photodissociation or predissociation (two processes which imply a change in the ...
R. Lefebvre
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2021
This chapter demonstrates how to predict shapes of polyatomic molecules and how to explain the bonding within them, including how the three bonding theories can be extended from diatomic to polyatomic molecules. The Lewis model, valence bond theory, and molecular orbital theory are looked at in turn, as each provides a different insight into structure ...
Ram Yatan Prasad, null Pranita
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This chapter demonstrates how to predict shapes of polyatomic molecules and how to explain the bonding within them, including how the three bonding theories can be extended from diatomic to polyatomic molecules. The Lewis model, valence bond theory, and molecular orbital theory are looked at in turn, as each provides a different insight into structure ...
Ram Yatan Prasad, null Pranita
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On the Vibrations of Polyatomic Molecules
Physical Review, 1932An exact solution of the wave equation is found for a form of one-dimensional potential energy which may be of use in discussing polyatomic molecular vibrational energies. An example of its use is given in an analysis of the vibration of the nitrogen in the ammonia molecule. The potential energy for this atom has two minima a distance $2{x}_{m}$ apart,
Rosen, N., Morse, Philip M.
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THE ENTROPY OF POLYATOMIC MOLECULES
Journal of the American Chemical Society, 1931By counting the total number of completely antisymmetric eigenfunctions which can be formed from the rotational states, the a priori probabilities of the different symmetry varieties of ammonia (nuclear doublet and quadruplet) and of methane (nuclear singlet, triplet and quintet) are derived and used to compute the corresponding entropies at 298.1 ...
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2013
Contents The Hückel approximation 232 An introduction to the method 232 Brief illustration 26.1: Ethene 232 The matrix formulation of the method 232 Example 26.1: Finding molecular orbitals by matrix diagonalization 233 ...
Peter Atkins +2 more
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Contents The Hückel approximation 232 An introduction to the method 232 Brief illustration 26.1: Ethene 232 The matrix formulation of the method 232 Example 26.1: Finding molecular orbitals by matrix diagonalization 233 ...
Peter Atkins +2 more
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The Eckart Conditions for a Polyatomic Molecule
American Journal of Physics, 1953The Eckart conditions for a polyatomic molecule are discussed. They are introduced to insure the smallness of the interaction between vibration and rotation and define a system of coordinates in which the vibration of the atoms around their equilibrium positions is described.
Ferigle, Salvador M., Weber, Alfons
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1994
This chapter analyses the principles that explain the electronic structures of diatomic molecules and those carried across larger molecules. It reviews how molecular-orbitals can be constructed from linear combinations of atomic orbitals, wherein the total electronic wave function is antisymmetrized in order to take account of the Pauli principle.
W.G. Richards, P.R. Scott
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This chapter analyses the principles that explain the electronic structures of diatomic molecules and those carried across larger molecules. It reviews how molecular-orbitals can be constructed from linear combinations of atomic orbitals, wherein the total electronic wave function is antisymmetrized in order to take account of the Pauli principle.
W.G. Richards, P.R. Scott
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On the Dissociation of Polyatomic Molecules
The Journal of Chemical Physics, 1960The dissociation of a simple model of a linear four-atomic molecule is treated classically by considering the motion of configuration points in the configuration space of the molecule. The usual configurational criterion for dissociation, i.e., the crossing of a critical surface in configuration space, is used.
Robert J. Rubin, Kurt E. Shuler
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Predissociation in polyatomic molecules
Molecular Physics, 1972The complexity of polyatomic, as compared with diatomic, predissociation theory is attributed to the existence of more than one exit channel, or fragment internal excitation state. It is shown, for type I predissociation that both the relative populations of the exit channels and the spectroscopic line width may be expressed in terms of matrix elements
C.E. Caplan, M.S. Child
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