CHM 1311 Chapter Notes - Chapter 5: Vsepr Theory, Covalent Bond

• School: University of Ottawa
• Department: Chemistry
• Course: CHM 1311
• Professor: Muralee Murugesu

Document Summary

Using vsepr to predict the shapes of molecules. 1 electron groups include bonds, lone pairs, and odd (unpaired) electrons. A multiple bond (double bond or triple bond) counts as one electron group. 2 a multiple bond (double bond or triple bond) counts as one bond in the vsepr model. 3 a = central atom, x = surrounding atoms, e = lone pairs. 4 molecules with this shape are nonpolar when all of the atoms connected to the central atom are the same. If the atoms connected to the central atom are different from each other, the molecular polarity needs to be considered on a case-by-case basis. 5 since electrons in lone pairs take up more room than electrons in covalent bonds, when lone pairs are present the bond angles are squashed slightly compared to the basic structure without lone pairs. <90 polar sp3d ax ax eq eq eq eq = equatorial ax = axial.