Can someone please explain the bond order, and the pi, pi* and sigma, sigma* stuff to...

Question

Question

Can someone please explain the bond order, and the pi, pi* and sigma, sigma* stuff to me. I'm really not understanding it at all.

Answer 1

Answer #1

bond order = [no of bonding electrons - no of anti-bonding electrons]/2

pi, sigma = bonding orbitals

pi* , sigma* = anti-bonding orbitals

Example: Bond order in Be₂

Be₂ = total no of electrons = 8

configuration = sigma1s² sigma*1s² sigma2s² sigma*2s²

Hence,

bond order = [no of bonding electrons - no of anti-bonding electrons]/2

= [ 4-4]/2

= 0

Answer 2

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