## Sigma and Pi bond question

$sp, sp^{2}, sp^{3}, dsp^{3}, d^{2}sp^{3}$

Natalie Yakobian
Posts: 45
Joined: Fri Sep 25, 2015 3:00 am

### Sigma and Pi bond question

For C2H4 a Carbon Carbon double bond why is the sigma bond (C2sp^3,C2sp^3) and the Pi bond (C2P, C2P)?

Sophia Xu 3F
Posts: 21
Joined: Fri Sep 25, 2015 3:00 am

### Re: Sigma and Pi bond question

Hi,
The sigma bond should be Csp2-Csp2, not Csp3-Csp3. Each 3 has 3 regions of e- density so there are 3 hybrid orbitals for each C. They also each has an unhybridized p orbital that forms a pi bond with each other.
Hope this helps!