Dipole Moments Polar Covalent Bonds: Dipole Moments

More documents

Recommendations

Info

Worked Example 2.1Predicting the Direction of a <strong>Dipole</strong> MomentMake a three-dimensional drawing of methylamine,CH 3 NH 2 , and show the direction of its dipolemoment ( = 1.31)2.3 Formal ChargesFormal charge• The difference in the number of electrons owned by an atom in a molecule andby the same atom in its elemental state• Formal charges do not imply the presence of actual ionic charges• Device for electron “bookkeeping”• Assigned to specific atoms within a molecule• Dimethyl sulfoxide CH 3 SOCH 3• Sulfur atom has three bonds rather than the usual two and has a formalpositive charge• Oxygen atom has one bond rather than the usual two and has a formalnegative chargeFormal ChargesFormal Charge Determination
Formal ChargesFormal Charges2.4 ResonanceTwo different ways to draw the acetate ion• Double bond placement• Neither structure correct by itself• True structure is intermediate between the two• Two structures are known as resonance forms
Page 1: 2.2 Polar Covalent Bonds: Dipole Mo
Page 5 and 6: Rules for Resonance Forms• electr
Page 7: Worked Example 2.3Drawing Resonance

Dipole Moments Polar Covalent Bonds: Dipole Moments

Create successful ePaper yourself

Delete template?

Save as template?