Structure 2.2.15 - Sigma (σ) and Pi (π)

Question 1

Define sigma bonds

Answer 1

sigma bonds are formed by the head-on combination of atomic orbitals, where the e- density is concentrated along the bond axis (head to head overlap)

Question 2

Which orbitals can form sigma bonds

Answer 2

S-S, S-P, P-P

Question 3

what does the overlapped area in a sigma bond represent

Answer 3

electron density

Question 4

Where can a sigma bond be found

Answer 4

sigma bond is always the first bond to form between two atoms, so every single bond is a sigma bond, and the first bond to form in a double or triple is also a sigma bond

Question 5

define pi bonds

Answer 5

pi bonds are formed by the lateral (side by side) combination of p orbitals

Question 6

where is the electrodensity in a pi bond

Answer 6

electron density is above and below the bond axis

Question 7

Which orbitals are involved in a pi bond

Answer 7

P-P

Question 8

Where can pi bonds be found

Answer 8

in the second + third bonds formed in a double or triple bond