IMFs
- Created by: ftpptf
- Created on: 02-03-16 18:22
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- IMFs
- London Forces
- Electrons in atom/ structure temporarily shift to one side of structure.
- This generates temporary dipole even in non-polar molecule.
- This temporary dipole induces dipole in neighbouring molecule.
- Two temporary dipoles attract towards each other.
- This is a temporary process but is constantly stopping and starting.
- Two temporary dipoles attract towards each other.
- This temporary dipole induces dipole in neighbouring molecule.
- This generates temporary dipole even in non-polar molecule.
- Strength depends on:
- No. of electrons
- Mr of molecule
- Electrons in atom/ structure temporarily shift to one side of structure.
- Permanent dipole-dipole
- Some molecules have permanent dipoles.
- These dipoles attract towards each other.
- Stronger because not temporary.
- These dipoles attract towards each other.
- Some molecules have permanent dipoles.
- Hydrogen Bonding
- NOT a bond!!
- Strongest IMF
- Happens when a molecule has a COVALENT BOND of a HYDROGEN to a FLUORINE, OXYGEN or NITROGEN.
- Bond of H to F/O/N is very polar.
- Lone pair of neighbouring F/O/N then attracted to very ?+ H.
- Happens when a molecule has a COVALENT BOND of a HYDROGEN to a FLUORINE, OXYGEN or NITROGEN.
- Strongest IMF
- NOT a bond!!
- London Forces
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