Textbook Notes (363,094)
Canada (158,187)
Chemistry (251)
CHMA11H3 (64)
Chapter 10

Chapter 10 Textbook Notes

4 Pages
Unlock Document

University of Toronto Scarborough
Jamie Donaldson

CHAPTER 10 CHEMICAL BONDING II MOLECULAR SHAPES VALENCE BOND THEORY AND MOLECULAR ORBITAL THEORYKey things to focus go back toHybridizationValence bond theory differences between Lewis TheoryLCAO theoryMolecular Orbital Theory the MO diagramsRemember VSEPR shapesFor heteronuclear diatomic molecules which MO do you use The MO of the least electronegative atom102 VSEPR Theory The Five Basic ShapesValence Shell Electron Pair Repulsion Theory o Electron groups ie lone pairs single bond multiple bonds single electrons repel one another o Repulsions btwn electron groups on interior atoms of a molecule determine geometry of molecule o Preferred shape of a molecule is one in which electron groups have max separation thus min energy o If molecule only contains one atom shape determined byof electron groups around central atomhow many are lone pairs bonding groups Two Electron GroupsLinear Geometry2 electron groups single or double without any lone pairs results in linear shape o 180 Three Electron Groups Trigonal Planar Geometry o 120Different types of electron groups exert slightly diff repulsions resulting in diff bond anglesDouble bond contains more electron density than single bond exerts slightly greater repulsion on single bond Four Electron Groups Tetrahedral Geometry o 10953dimensional when there are 4 or more electron groups Five Electron Groups Trigonal Bipyramidal Geometry o o 90 120 Six Electron Groups Octahedral Geometry o 90 103 VSEPR Theory The Effect of Lone Pairs Four electron groups with Lone PairsElectron geometry geometrical arrangement of electron groupsMolecular geometry geometrical arrangement of atoms4 electron groupsone lone pairtrigonal pyramidalLone pair electrons generally exert slightly greater repulsions that bonding electronsLone pair spread out more than bonding pair bc lone pair is only attracted to one nucleus while bonding pair attracted to two o 107 o 4 bonding pairs2 lone pairsbent ie H2O 1045Most repulsivelone pair to lone pair nd 2lone pairbonding pair
More Less

Related notes for CHMA11H3

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.