Two pi and half sigma bonds are present in:

Question

Canvas Classes · Accepted Answer

"Two pi and half sigma bonds" means bond order = 2 + 0.5 = 2.5, with the configuration having 2 π bonds and 0.5 σ bond (i.e., the σ bond is half-filled).

Step 1 — Find species with BO = 2.5 where the half-bond is a σ:

(13 electrons):
MO config: 
- σ bonds:  (cancels with ) +  = half σ bond
- π bonds:  = 2 π bonds
- BO = (7−2)/2 = 2.5 ✓

This gives 2 pi bonds and half sigma bond.

Answer: Option (2) —

More questions from Chemical Bonding