(acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04
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Transcript of (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04
•Describes an atom’s ability to compete for electrons with other atoms to which it is bonded.
∆ E.N. gives a clue at so how ionic a compound is: Ex: HCl ∆ E.N. 3-2.1 = 0.9 vs. H-C 2.5-2.1 = 0.4 HCl bond has more “ionic character” it is said to be more polar because Electrons are not shared equally.
ΔEN =3-2.1 = 0.9
bond has a “dipole” to poles one is slightly Positive the other is slightly negative.
ΔEN 0-.5 non polar, ΔEN 0.6-1.6 polar covalent, ΔEN 1.7< Ionic
• Δ EN for HCl
• 3.0 – 2.1 = 0.9
• Ionic character from graph 20%
What is the ionic character for an KBr bond?
•Polar bond • Molecular dipole • (Dipole moment)
Look for polarity in a bond Look for symmetry In a molecule
Think about the geometry
Draw the Lewis structure for N3 -
a. What is the electron geometry around the central Nitrogen?
b. Does the ion have a dipole?
Predict the shape and find the dipole moment
•SO3 •CS2 •OCS