Question

Which of the following statements about overlap integrals of the various orbital is true -

1)2p>2s>2sp^3>2sp^2>2sp

2)2p>2sp^3>2sp^2>2sp>2s

3)2p>2sp>2sp^2>2sp^3>2s

4)2sp^3>2sp^2>2sp>2p>2s

Answer 1

Option (4) is correct.

In simple words, you can understand overlap integral is total volume of overlaping,
In sp3 more overlapping is there than in sp2 because in sp3 one and 3 p are overlapping and in sp2 one s and 2 p are overlapping. Similarly order will be
2sp^3>2sp^2>2sp>2p>2s