Molecular fragments joined by a pi bond cannot rotate about that bond without breaking the pi bond, because rotation involves destroying the parallel orientation of the constituent p orbitals.
32.
Key in the bent bond explanation of the gauche effect in difluoroethane is the increased p orbital character of both C F bonds due to the large electronegativity of fluorine.
33.
What I mean is that p orbitals are symmetrical across a plane normal to the radial axis, and sp3 orbitals would be denser on the side of the bond.
34.
Key in the bent bond explanation of the gauche effect in difluoroethane is the increased p orbital character of both carbon fluorine bonds due to the large electronegativity of fluorine.
35.
In the language of valence bond theory, the carbon atoms in an alkyne bond are sp hybridized : they each have two unhybridized p orbitals and two sp hybrid orbitals.
36.
The product of an s orbital and a p orbital has only charge and dipole components, and the product of two p functions has charge, dipole and quadrupole components.
37.
The three oxalate ions donate 12 electrons in all and Fe-III has three electrons in the d orbitals leaving 13 empty places in the remaining d and p orbitals.
38.
The two most common types of bonds are sigma bonds ( usually formed by hybrid orbitals ) and pi bonds ( formed by unhybridized p orbitals for atoms of main group elements ).
39.
A facile explanation invokes the symmetry-allowed overlap of a p orbital on the boron atom with the in-phase combination of the three similarly oriented p orbitals on fluorine atoms.
40.
A facile explanation invokes the symmetry-allowed overlap of a p orbital on the boron atom with the in-phase combination of the three similarly oriented p orbitals on fluorine atoms.
