Advices For Studying Organic Chemistry

(Wang) #1
2.14A ION-ION FORCES


  1. The strong electrostatic lattice forces in ionic compounds give them high melting
    points.

  2. The boiling points of ionic compounds are higher still, so high that most ionic
    organic compounds decompose before they boil.


Figure 2.6 The melting of sodium acetate.

2.14B DIPOLE-DIPOLE FORCES


  1. Dipole-dipole attractions between the molecules of a polar compound:


Figure 2.7 Electrostatic potential models for acetone molecules that show how
acetone molecules might align according to attractions of their partially
positive regions and partially negative regions (dipole-dipole
interactions).

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