Delocalized Model- molecular orbital theory

Question 1

Delocalized electron model

Answer 1

molecule is a collection of nuclei and electrons, electrons are assumed to be delocalized

Question 2

constructive interference

Answer 2

when standing waves add to each other, results in bonding molecular orbital (MO)

Question 3

destructive interference

Answer 3

waves cancel each other out, results in anti-bonding molecular orbital (MO*)

Question 4

Which is higher in energy: bonding or anti-bonding molecular orbital?

Answer 4

anti-bonding, bc bonding has less energy since it is more stable

Question 5

Bond order equation

Answer 5

(# of bonding electrons - # of anti-bonding electrons)/2

Question 6

True or false: higher bond order means higher strength

Answer 6

true

Question 7

Homonuclear Diatomic Molecules

Answer 7

• Compose of 2 identical atoms, Only the valence orbitals of the atoms
• contribute significantly to the molecular orbitals of a particular molecule.

Question 8

two s orbitals result in what kind of bond?

Answer 8

σ (sigma) bond

Question 9

One s orbital and one p orbital result in what kind of bond?

Answer 9

σ (sigma) bond, anytime an s orbital is involved, it will always make a sigma bond!

Question 10

If two p orbitals interact what bond will it make?

Answer 10

It depends. sideways = pi, head on = sigma

Question 11

interaction of two p subshells

Answer 11

one sigma and two pi bonds!

Question 12

paramagnetism

Answer 12

substance is attracted into the inducing magnetic field (unpaired electrons)

Question 13

diamagnetism

Answer 13

substance is repelled from the inducing magnetic field (all electrons are paired)

Question 14

is FB₂ paramagnetic or diamagnetic?

Answer 14

Paramagnetic! this is an exception!