CHEM 127 Lecture Notes - Lecture 10: Sigma Bond, Trigonal Planar Molecular Geometry, Electron Density
Document Summary
Structure 1 and 2 would be the best because the molecule has a charge of -1 and since there is the least amount of charge in the 1st and 3rd molecules makes them the best. We want to have as little formal charge as possible. It can have more than 8 valence electrons because of the extended octet rule. Any atom in period 3 or lower can become hypervalent. Signi es the atom that is hogging more of the electrons. Bond dipole, shows polarity in a covalent bond. Measure of a tendency of an atom to attract electrons in a bond. Larger values mean the atom will attract electrons more. As you go from left to right on the periodic table, electronegativity increases. When you move down the groups the electronegativity decreases. The bigger the difference in electronegativity, the more polar the bond is.
