Topic 11: Valence Bond Theory, Video A: Introduction to Valence Bond Theory

Question 1

How does covalent bonding occur in Valence Bond Theory?

Answer 1

Through hybridization where electrons shared between 2 nuclei (2 center bonding). Bonds are formed by the overlap of atomic orbitals on 2 nuclei.

Question 2

The trigonal planar hybridization of the s, px, py, atomic orbitals results in what?

Answer 2

The formation of three sp2 hybrid orbitals centered in the xy plane. (and one unhybridized orbital).

Question 3

In octahedral geometry the hybridization orbitals are called what?

Answer 3

d2sp3

Question 4

What is Molecular Orbital Theory

Answer 4

Covalent bonding occurs through molecular orbitals where electrons are shared between all nuclei (multi-center bonding). Bonds are formed by simple overlap of atomic orbitals on 2 or more nuclei.

Question 5

Five electron pairs producing the trigonal bipyramidal shape having a hybridization of s+px+py+pz+dz2 equals what orbitals?

Answer 5

5 dsp3 hybrid orbitals.

Question 6

The linear geometry hybridization of the s and px atomic orbitals results in what?

Answer 6

The formation of two sp hybrid orbitals along the x axis. (and two unhybridized py and pz orbitals.)

Question 7

Tetrahedral hybridized 2s + 2px+ 2py+2pz equals what?

Answer 7

4 sp3 orbitals withn no unhybridized p orbitals.