One problem with using dipolar couplings in structure determination is that a dipolar coupling does not uniquely describe an internuclear vector orientation.
12.
Five transitions have heightened intensities that correspond to ?? = 0 i . e ., a parallel polarization to the internuclear axis.
13.
As the internuclear separation increases, the molecule absorbs energy and the electronic wavefunction evolves to the antibonding state on the femtosecond timescale.
14.
This overlap leads to the formation of a bonding molecular orbital with two nodal planes which contain the internuclear axis and go through both atoms.
15.
Although internuclear magnetic dipole couplings contain a great deal of structural information, in isotropic solution, they average to zero as a result of diffusion.
16.
As this intersection occurs at a great distance, the ionic character of the binding of these states near the equilibrium internuclear distance r is virtually unaffected.
17.
The first is a sum of kinetic energy operators for each electron, the internuclear repulsion energy, and a sum of nuclear-electronic Coulombic attraction terms.
18.
Diffraction occurs because the wavelength of electrons accelerated by a potential of a few thousand volts is of the same order of magnitude as internuclear distances in molecules.
19.
In cyclopropane, the maximum electron density between two carbon atoms does not correspond to the internuclear axis, hence the name " bent bond ".
20.
More formally, it is characterized by " " a conjugate horizontal gaze palsy in one direction and an internuclear ophthalmoplegia in the other " ".
