Valence Bond Theory
What is an orbital?
A region in space which there is 95% probability of finding the electrons
What is formed when two s orbitals overlap?
A sigma bond
Define bond length.
The distance between the nuclei of 2 bonded atoms.
What is the central principle of Valence Bond Theory?
When a covalent bond form when the orbitals from 2 atoms overlap and a pair of electrons occupy the region between the 2 nuclei.
What orbital does carbon form?
Sp hybrid obrital
A pi (π) bond is ____ of a double bond.
one half
Name one of the three concepts of Valence bond Theory.
- two electrons of opposite spin can accommodate the overlapping orbitals
- the greater the overlap of orbitals, the stronger the bond
- hybridisation
either one
What orbitals have to mix to form a sp hybridisation? What angle does it have?
- s and p
- 180º
The larger a bond, the ____ it is too.
shorter
When you add 1s orbital of hydrogen to 2p orbitals of fluorine, what does the overlap create?
H-F sigma bond
When a molecule’s electronic geometry is octahedral and has an angle of 90º, what is its hybridisation?
sp3d2
What are the unique properties of a double bond?
Made up of one sigma bond and π bond only. if the 2p atomic orbitals are parallel