Madi Wright
8
ML 408
[email protected]
CHEM 1001
Tuesdays 3:30-4:30pm
Lectures:TheoriesofChemicalBonding1–3
Textbook:Chapter7
Topics:
• DipoleMoment
• OrbitalOverlapModel
• HybridOrbitalTheory
• MolecularOrbitalTheory
• BondOrder
• Magnetism
• BandTheoryofSolids
Opener:KahootVSEPRReview (10minutes)
SummaryChart
(20minutes)
• 3groups:eachwillbeassignedoneofthethreetopics,andthenwillteachittothe
restofthegroup!
Whatisit?
Example
Orbital
Overlap
Model
Hybrid
Orbital
Theory
Molecular Orbital
Theory
8
Madi Wright
ML 408
[email protected]
CHEM 1001
Tuesdays 3:30-4:30pm
PracticeQuestions:
1.Completethefollowingtable:
Electron
Steric
Group
Hybridization
Number
Geometry
2
Trigonal
Planar
Numberof
Hybrid
Orbitals
(45minutes)
Numberof
Unusedp
Orbitals
Picture
sp3
5
0
2.Referringtothestructureofethylene,C2H4,shownbelow,answerthefollowing
questions:
a) Aisa_________bond.Itisformedbytheoverlapofa_________orbitalofonecarbon
withan___________orbitalofanother.
b) Bisa__________bond.Itisformedbytheoverlapofa__________orbitalofonecarbon
witha____________orbitalofanothercarbon.
c) Cisa__________bond.Itisformedbythe
overlapofan__________orbitalofthecarbon
witha____________orbitalofthehydrogen.
d) Thismoleculehasasingle/double/
triplebondbetweencarbonatoms.Circleone.
Madi Wright
8
[email protected]
CHEM 1001
ML 408
Tuesdays 3:30-4:30pm
3.AniminemoleculecontainsaC=Nbond.DrawtheLewisStructureandlabelthebondsof
themolecule,includingreferencetopiandsigmabonds(ifany),aswellasthe
hybridizationsofatoms.
4.AmolecularorbitaldiagramfortheF2moleculeisshowntotheright.
a) CalculatethebondorderofF2.
b) CouldF22+exist?Whyorwhynot?
c) Which,ifany,ofF2,F2-andF2+areparamagnetic?
d) ComparetherelativebondlengthsandbondenergiesofF2andF2-.
Madi Wright
8
[email protected]
CHEM 1001
ML 408
Tuesdays 3:30-4:30pm
5.Whatisadipolemoment?Howdoyoufindit?
6.ExplainthedifferencebetweenHOMOandLUMO.
7.BrieflyexplaintheBandTheoryofSolids.
Closer:MockMidterm2 (5minutes)
th
• Midterm2:FridayNovember18 6:30-8:00pm
• MockMidterm2Take-Up:WednesdayNovember16th7:30-10:30pminAT101
• IwillbereleasingthemockmidtermsoonJ
• Startstudying!