CHEM 110 Lecture Notes - Lecture 20: Chemical Polarity, Covalent Bond, Alpha Helix
Document Summary
Ion-ion = depends on ion charge (q) and distance (r) Ion-dipole = depends on ion charge (q), distance (r), and dipole moment ( ) Dipole-dipole = depends on distance (r) and dipole moment ( ) Polar molecules have partial positive and negative ends. Ion-induced dipole = depends on ion charge (q), distance (r), and polarizability. An ion partially polarizes a non-polar molecule. Ex: hemoglobin (protein in red blood cells)- fe binds with o via imf"s. An induced dipole where e- are constantly in motion, forming temporary/instantaneous dipoles (depends on and r) Instantaneous dipole moment forms when there are more e- on one side of the molecule. Each moment forms another moment in a neighboring atom. All molecules will interact through ldf"s in some way (e- move in sync) Ex: alkanes only use ldf"s because they"re non-polar (as their sizes increase, so do their mp/bp"s) Depend on size/molecular weight, shape, and polarizability.
