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Just to clarify, pi and sigma bonds occur in both non polar and polar molecules. In the lecture Lavelle showed N2, a no polar bond, and cis-Diochloroethene, A polar bond. Therefore, does this mean that a sigma bond occurs in every single bond, and a sigma and a pi bond occur in every double bond, and so forth for triple bonds? Do all covalent bonds have sigma and/or pi bonds?
Yes, all covalent bonds are bonds where electrons are shared and orbitals overlap(sigma bonds). Pi bonds happen when it is a double or triple bonds. It doesn't matter whether the molecule is polar or nonpolar because we are talking about intramolecular forces not intermolecular forces.
Many covalent compounds contain multiple bonds (double or triple bonds). A difference between single and multiple bonds is that single bonds only have a sigma bond, whereas multiple bonds have both sigma and pi bonds.
Hi! Like others have said above, I believe you are correct. Sigma bonds and pi bonds are found in covalent bonds, with single bonds having only a sigma bond. For double bonds and beyond, both sigma and pi bonds are present.
Yes all covalent bonds would have sigma and pi bonds. However, single bonds only have sigma bonds while double and triple bonds would have both sigma and pi, with the pi bonds making the double and triple bonds more difficult to break.
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