Molecular Orbitals and Bonding

Question 1

What molecular property is highlighted in the molecular orbital diagram below?

Answer 1

HOMO-LUMO Gap

Question 2

Classify the highlighted orbital

SOMO,HOMO, or LUMO

Answer 2

LUMO

Question 3

Based on the MO diagram below,as the energy of the e_g bonding orbital set decreases, the HOMO-LUMO gap ______.

Increase or Decreases

Answer 3

Decreases

Question 4

Based on the MO diagram below, the non-bonding orbital is mostly composed of ________.

Metal or Ligand Character

Answer 4

Metal Character

Question 5

Based on the MO diagram below, the antibonding orbitals are mostly composed of ________.

Metal or Ligand Character

Answer 5

Metal Character

Question 6

Based on the MO diagram below, the bonding orbitals are mostly composed of ________.

Metal or Ligand Character

Answer 6

Ligand Character

Question 7

Classify the highlighted orbital?

SOMO,HOMO, or LUMO

Answer 7

HOMO

(Note: specifically a non-bonding orbital)

Question 8

LUMO​

Answer 8

Lowest energy unoccupied molecular orbital

Question 9

HOMO​

Answer 9

Highest energy occupied molecular orbital​

Question 10

What type of moleculer orbitals result from the interactions below?

Answer 10

π-orbitals

Question 11

What is the bond order for the molecule represented below?

Answer 11

The bond order is 2

Question 12

1/2*(#Bonding e^- - #antibonding e^-)

Answer 12

Bond Order

Question 13

Identify the orbitals below as bonding, non-bonding, or anti-bonding orbitals.

Answer 13

Anti-bonding Orbitals

Question 14

Walsh diagrams

Answer 14

A representations of calculated orbital binding energies of a molecule versus a distortion coordinate

Question 15

Predict the electron configution of of CH₃^- based on the correlation digram below.

Answer 15

1a₁² 1e⁴ 2a₁²

(Counting the valence electrons and then predicting the most stable structure are the first two steps)

Question 16

Predict the structure of CH3^. based on the correlation digram below.

Answer 16

Planar (D_3h)

The energy gain by lowering of the 1e’ degenerate orbitals is greater than the energy loss by occupancy of a single electron in a₂’’ and hence CH3 ^• is planar.

Question 17

Which molecule orbital is the highest energy orbital?

Answer 17

A
(Contains the most nodes)

Question 18

Which molecule orbitals of cyclobutane are degenerate in energy?

Answer 18

B and C

(They contain the same number of nodes)

Question 19

Identify the orbitals below as bonding, non-bonding, or anti-bonding orbitals.

Answer 19

Non-bonding Orbital

Question 20

Identify the orbitals below as bonding, non-bonding, or anti-bonding orbitals.

Answer 20

Bonding Orbitals

Question 21

What type of moleculer orbitals result from the interactions below?

Answer 21

σ-orbitals