Hybridized Orbitals

Question 1

Which has the greatest effective electronegativity?

sp³, sp², or sp

Answer 1

sp hybridized orbital

Question 2

Which has the smallest effective electronegativity?

sp³, sp², or sp

Answer 2

sp³ hybridized orbital

Question 3

Which has the greatest C-H bond strength?

sp³, sp², or sp

Answer 3

sp³ hybridized orbital

Question 4

Which has the weakest C-H bond strength?

sp³, sp², or sp

Answer 4

sp hybridized orbital

Question 5

Which has the longest C-H bond length?

sp³, sp², or sp

Answer 5

sp³ hybridized orbital

Question 6

Which has the shortest C-H bond length?

sp³, sp², or sp

Answer 6

sp hybridized orbital

Question 7

Your electron geometry is tetrahedral. What is your hybridization?

Answer 7

sp³

Question 8

Your electron geometry is trigonal planar. What is your hybridization?

Answer 8

sp²

Question 9

Your electron geometry is linear. What is your hybridization?

Answer 9

sp

Question 10

How many unhybridized p-orbitals are present in a sp³ hybrid?

Answer 10

0

Question 11

How many unhybridized p-orbitals are present in a sp² hybrid?

Answer 11

1

Question 12

How many unhybridized p-orbitals are present in a sp hybrid?

Answer 12

2

Question 13

What is σ bond?

Answer 13

Overlap between hybridized and unhybridized orbitals

Question 14

What is a π bond?

Answer 14

Side-ways “overlap”of unhybridized p-orbitals

Question 15

Which is stronger?

A σ bond or a π bond?

Answer 15

σ bond

Question 16

Define constructive overlap

What does it result in?

Answer 16

Orbitals that are in phase (have the same sign) add together

Results in a bonding Molecular Orbital (σ MO)

Question 17

Define destructive overlap

What does it result in?

Answer 17

Orbitals that are out of phase (have the opposite sign) cancel out

Results in an antibonding* Molecular Orbital (σ* MO)

Question 18

Can you do a bond rotation around single bonds? Why or why not

Answer 18

Yes, this is usually permitted due to the symmetry of σ MOs.

Question 19

Can you do a bond rotation around a double bond? Why or why not?

Answer 19

No, the symmetry of the π MO restricts rotation (i.e. you will break the π bond)