CHE 8A Lecture Notes - Lecture 5: Intermolecular Force, London Dispersion Force, Substituent
Document Summary
If name carries on to next line, may use line-break hyphen. Number so you get the lowest possible #"s on substituents. If a tie go abc order. Methyl cyclohexane only 1 substituent, has to be c #1. 1 substituent will be #1 and the other as low as possible. Tie: so we go with abc order. If 2 or more are on the same c, always make that c #1. If exactly 2 substituents on a ring: 2 different 3d structures. Measure of energy it takes to break up all intermolecular forces. Higher boiling point (bp) = more intermolecular forces. Alkanes: only one kind of intermolecular force (imf) Move around like at a party, leaving an average overall force. London forces: random motion of e- clouds create temporary dipole. Increase with larger molecules = more stuff = more e- Increase with greater surface area (more dipole to contact) Haloalkanes: increased bp when compared to alkanes.
