10-5 - Dipole forces exist between polar substances H-Cl...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
H - Cl δ+ δ- Dipole forces exist between polar substances Perm.dipolar forces dispersion forces H H - - Cl Cl vs F-F F-F dispersion forces BP: 188 K BP: 85 K 2 requirements to be a polar substance   EN difference between bonded atoms the right shape Section 7.3
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1) Draw the Lewis structure & determine shape. (Ex. SO 2 ) How to determine if a molecule has a permanent dipole (i.e.,how to determine if a molecule is polar.) S O O One resonance structure Shape: bent, 120° bond angle Section 7.3
Background image of page 2
S O O 2) Show the bond dipole for the electron bonding regions. Remember: the less EN atom has the “+” end of the bond dipole arrow. Bond dipoles 3) Now imagine that the more EN atoms pull. Will the central atom move? If atoms move in the scenario, then the molecule has a permanent dipole. Section 7.3 Polar molecule
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1) Draw the Lewis structure & determine shape. (Ex. CO 2 ) How to determine if a molecule has a permanent dipole (i.e.,how to determine if a molecule is polar.) Shape: linear, 180° bond angle O C O Section 7.3
Background image of page 4
C O O 3) Now imagine that the more EN atoms pull. Will the central atom move? If atoms do not move in the scenario, then the molecule does not have a permanent dipole. Bond dipoles 2) Show the bond dipole for the electron bonding regions.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/20/2008 for the course CH 101 taught by Professor Bigham during the Fall '08 term at N.C. State.

Page1 / 22

10-5 - Dipole forces exist between polar substances H-Cl...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online