CHM151Y1 Lecture Notes - Lecture 1: Amide, Glycerol, Polychlorinated Biphenyl
Document Summary
What to look for when making predictions about properties: Polarity of bonds ( enc = 2. 55 enh = 2. 20 eno = 3. 44 enn = 3. 04 ) non polar. Symmetry 3d shape (snap : symmetrical = non-polar asymmetrical = Polar: in organic chemistry, polarity usually results in hydrogen bonding, van der waals forces. Larger molecules = more van der waals forces: presence of functional groups, acidic / basic (can it ionize?, each function group is involved in particular chemical reactions, degree of saturation, reactivity : alkanes < alkene / alkyne. Extremely stable / non-reactive, but reacts with ozone. Used extensively throughout the 1920s - 1970s as a refrigerator coolant, and in aerosols. Depleted ozone and persists for decades (~ 70-100 years) Source: world meteorological organization, scientific assessment of ozone depletion: 2002, wmo global ozone. 1,1,1-trichloro-2,2-di(4: widely used insecticide throughout 1940"s -1950"s, banned in 1972 as a result of environmental impact.
