p bonds Visit httpscheckinicsuciedu Log in and select Chem 1A When prompted type the word of the day sigma Ensure when asked if you will share your location you select allow ID: 392581
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Slide1
s and p bondsSlide2
Visit: https://checkin.ics.uci.edu
/
Log in and select Chem 1A. When prompted, type the word of the day: sigmaEnsure when asked if you will share your location you select “allow”. Visit: https://learningcatalytics.com/Sign in MasteringChemistry account name When prompted, type session ID:67871442
Please turn off all downloads. You can usually pause them by clicking on them and clicking pause. Facebook and youtube are officially banned during class time (this is not me micromanaging, it’s a legit internet issue as told to me by OIT).
Remember back 5 rows of even side are no seating zones
Visit: https://checkin.ics.uci.edu/ Word of the day: sigmaLearningCatalytics: session ID:67871442
Note: “extra examples” for this
will be posted shortly after class!
Thanks for your patience with these.Slide3
Survey Questions
Review:
How
to determine polar and non-polar?
Step 1: Determine if any bonds are polar (i.e. is there a difference in electronegativity)Step 2: Decide if the polar bond cancel each other or not.
Today’sIs it possible to have more than two pi bonds or is that the highest allowed number of pi bonds?
For this class, definitely just 2 pi bonds per bond max (i.e. a triple bond is made of 1 s and 2 p) I have questions about bonds and how to determine if they are head to dead or side to sideAre always end-on-end, and p are always side on side. So the first bond is end-on-end and the second and third (i.e. in double and triples) are side-on-side
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Word of the day:
sigma
LearningCatalytics
: session
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67871442Slide4
Extra CreditCoursera and Video Assignments: Turn in hard copies of each at the final Exam Please!
Office hour change today only : 1-2 RH 214
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Word of the day:
sigmaLearningCatalytics: session ID:67871442Slide5
“quiz Question 1” (of the non-scary low stakes Variety)A single bond is the:A) single
bond only.
B) single
bond and one of the bonds in any double or triple bond. C) only located in double bondsD) only located in triple bonds.
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Word of the day: sigmaLearningCatalytics: session ID:67871442Slide6
“quiz Question 1” (of the non-scary low stakes Variety)A ______ bond is not freely rotatable.
A) single
bond only.
B) double bondC) triple bondD) double or triple E) none of the bonds are freely rotatable.
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Word of the day: sigmaLearningCatalytics: session ID:67871442Slide7
Sigma Bonds
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Word of the day:
sigma
LearningCatalytics: session ID:67871442Slide8
Sigma Bonds
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Word of the day:
sigma
LearningCatalytics: session ID:67871442Slide9
Sigma Bonds
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Word of the day:
sigma
LearningCatalytics: session ID:67871442Slide10
s
bonds
Sketch (badly is fine) what the bonds in the following molecules look like according to valence bond theory:
H2Cl2
HCl
OR
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s bonds
Sketch (badly is fine) what the bonds in the following molecules look like according to valence bond theory:
O
2s
p
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Going back to our Previous Structures. (we’ll skip some of them and I’ll alter a few for this purpose. )
C
H
HO
What is
the
hybridization on carbon?sp2What are the orbitals used for each type of bond?
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sigma
LearningCatalytics
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67871442Slide13
Atomic orbital hybridization
s
p
p
p
sp
2 hypridization
sp
2
sp
2
p
sp
2
E
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sigma
LearningCatalytics
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Going back to our Previous Structures. (we’ll skip some of them and I’ll alter a few for this purpose. )
What are the orbitals used
for each type of bond?
s
p
s:C’s sp2 and O’s p
C’s sp2 and H’s s p:C’s p and O’s pss
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sigma
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Faster Examples:
sp
3
sp
2sp3
What is the hybridization on each “central” atom (Ns and C)?What orbitals from each atom is each bond formed with?
Each nitrogen hydrogen bond (they all happen to be the same here)?Each carbon nitrogen bond (they all happen to be the same here)?The carbon oxygen bond?s: Nitrogen’s sp3 and Hydrogen’s ss: Nitrogen’s sp3 and Carbons sp2s: Oxygen’s p and Carbons sp2p: Carbon’s p and oxygen’s p
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LearningCatalytics
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67871442Slide16
Faster Examples: What is the hybridization on each “central”, what is each bond formed with?
sp
3
sp
C-Cl: Cl’s p orbital, carbons sp orbital
C-N: s : carbons’ sp and nitrogen’s p ps
: carbon’s p and nitrogen’s pP-Br: Br’s p orbital, phosphorous’s sp3 orbitalVisit: https://checkin.ics.uci.edu/
Word of the day:
sigma
LearningCatalytics
: session
ID:
67871442Slide17
sp
3
sp
2
sp3
sp3
sp3Faster Examples: What is the hybridization on each “central”, what is each bond formed with?H-O bond: H’s s orbital, and O’s sp3O-N single bond: O’s sp3 and N’s sp2O-N double bond: s: N’s sp2 and O’s p p: N’s p and O’s pH-S bond: H’s s orbital, and S’s sp3C-H bond: C’s sp3 and H’s s orbitalC-I bond: C’s sp3 and I’s p orbital
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Word of the day:
sigma
LearningCatalytics
: session
ID:
67871442Slide18
Going back to our Previous Structures. (we’ll skip some of them and I’ll alter a few for this purpose. )
N
O
O
N
O
O
s
p
s
s:
N
’s sp
2
and O’s p
N
’s sp
2
and O’s p
p:
N’s p and O’s pSlide19
sp
2
sp
2sp2
sp2sp2
sp3
Faster Examples: What is the hybridization on each “central”, what is each bond formed with?All C-H bonds: Carbon’s sp2 and Hydrogen’s sAll C-C s bonds: carbon’s sp2 and carbons sp2All C-C p bonds: carbon’s p bonds delocalized over entire ring