CHE 118A Office Hour

Year & Quarter

2024 Fall Q001-094

2025 Summer session 1 Q095-Q154

Q151

Ether RXNs 1-2

Q152

Ether RXNs 1-3

Q153

Epoxide acidic

Q154

Epoxide basic

Q155

Comming soon

Q146

ROH Synthesis

Q147

ROH reaction SN2

Q148

ROH reaction SN1

Q149

ROH dehydration

Q150

Ether RXNs 1-1

Q141

2025 SS1 MT Q5C SN2 resction

Q142

2024 Fall Discussion Quiz 7E Q2

Q143

Synthesis ROH Reaction

Q144

Retrosynthesis example

Q145

Difference b/t R:- and H:-

Q136

2024 Fall Discussion Quiz 7C (integration)

Q137

2024 Fall Discussion Quiz 7C (splitting)

Q138

Discussion week 8

Compound D

Q139

2025 SS1 MT Q3 Resonance Structure B

Q140

2025 SS1 MT Q3 Resonance Structure C

Q131

SN2 (note 18 Q1)

table drawing

Q132

SN2 (note 18 Q1) write products

write products

Q133

SN2 (note 18 Q1) write products

write products

Q134

2024 Fall Discussion Quiz 7A (integration)

Q135

2024 Fall Discussion Quiz 7A (splitting)

Q126

R/S

Q127

SN1 (2024 Fall Midterm 5a)

write products

Q128

SN1 (2024 Fall Midterm 5a)

Q129

SN1 (2024 Fall Midterm 5a)

Newman projections

Q130

SN1 (2024 Fall Midterm 5a)

mechanism

Q121

Dr. Nasiri midterm 2 Q6 (3)

Q122

Dr. Nasiri midterm 2 Q6 (4)

Q123

Dr. Nasiri midterm 2 Q6 (5)

Q124

Chair

Q125

R/S

Q116

Fischer 2 carbons

Q117

Fischer 6 carbons

Q118

Discussion Meso

Q119

Dr. Nasiri midterm 2 Q6 (1)

Q120

Dr. Nasiri midterm 2 Q6 (2)

Q111

Note 09 F2 Cl2 Br2 Comparison

Q112

Practice Midterm 2024 Fall Q2A

Major Products

Q113

Practice Midterm 2024 Fall Q2B

Mechanism step 1-2

Q114

Practice Midterm 2024 Fall Q2B

Mechanism step 3

Q115

Discussion E/D/M/I

Q106

Note 09 All products

Q107

Note 09 Cl2 + alkane

Q108

Note 09 Why 6H on iPr same chemical environment?

Q109

Note 09 F2 + alkane

Q110

Note 09 Br2 + alkane

Q101

Lecture 04 (Note 07) Tertiary Radicals

Q102

Lecture 04 (Note 07) Energy Diagram

Q103

Lecture 04 (Note 07) Radical + Energy Diagram

Q104

Discussion week 4 Q2M (R/S)

Q105

Discussion week 4 Q2M (R/S)

Q96

Newmann Projection

Q97

Discussion Week 1

Q4 K

Q98

Discussion Week 1

Q4 K (why minor)

Q99

Lecture 04 (Note 07) Primary Radicals

Q100

Lecture 04 (Note 07) Secondary Radicals

Q91

last week

Q92

last week

Q93

last week

Q94

last week

Q95

Discussion Week 1 Q4 D

Q86

last week

Q87

last week

Q88

last week

Q89

last week

Q90

last week

Q81

Another synthesis

Q82

Q81 other ways?

Q83

Note 25 Synthesis

Q84

Note 24 Epoxide

Q85

Epoxide in synthesis

Q76 OM

Ch 8 Reactions

Q77 LiAlH4

Ch 8 Reactions

Q78

Ch 8 Reactions

Q79

Note 24 Synthesis

Q80

Q79 other ways?

Q71 RMgX

Note 21 front page

Q72 RMgX

Note 21 front page

Q73 Nomenclature

Note 23

Q74 NMR

Week 7-8

Q75 RLi

Ch 8 Reactions

Q66 E2

chair conformation + mechanism

Q67 1o alcohol

synthesis map start 01

Q68 2o alcohol

synthesis map start 02

Q69 3o alcohol

synthesis map start 03

Q70 NMR

discussion week 6

Clarification Mechanism writing: SN1

Clarification: 1) since carbocation from, it's not a really "normal" chair as carbocation want to be on the sample plane; 2) it's not a correct ring flip as ring flip should have "wedge" bond always "wedge", just changing the axial to equatorial. However, it's showing the correct products of SN1.

Q61 Nu vs Base

Suggest reading text book (8th edition) page 246-247

Q62 which mechanism?

use table (emmmm didn't draw table out

Q63 SN1

chair conformation + mechanism

Q64 E1

chair conformation + mechanism

Q65 SN2

chair conformation + mechanism

Q56 SN2

Note 17 front page anti H Q5

Q57 SN1 + E1

Note 18 front page bottom part 1

Q58 SN1

Note 18 front page bottom part 2

Q59 E2

Problem Set 3 Q9 part 1

Q60 E2

Problem Set 3 Q9 part 2

Q51 use table

Textbook Ch 6 Q38 a-c use table

Q52 IR

Discussion week 5 question D

Q53 E2

Note 17 front page anti H Q2

Q54 E2

Note 17 front page anti H Q3

Q55 E2

Note 17 front page anti H Q4

Q46 SN1

H shift or alkyl shift: formation of a more stable carbocation

Q47 IR

Discussion week 5 question F

Q48 synthesis

Note 16 back page synthesis Q2

Q49 table

half way of filling the "table"

Q50 solvents

Polar protic and polar aprotic

Q41 SN2

Note 14 front page Example 7

Q42 IR overall

Discussion week 5 overal

Q43 IR

Discussion week 5 question B

Q44 IR

Discussion week 5 question C

Q45 solvents

Note 15 polar protic and polar aprotic

Ch 6 SN2/SN1/E2/E1

Office Hour Videos from 2020 (Jiahui Was the TA of CHE 118A)

This video includes some "predict major products" at end.

I believe it was the last OH before 2nd midterm (so people did asked some good questions).

Q36 chair

Textbook P72 Ch4 Q31 d

Q37 chair

Write all axial and equatorial bonds

Q38 Fischer Projection

Discussion week 4 P47

Q39 Fischer

Discussion week 4 Q3 last one

Q40 SN2

Note 14 front page Example 3

Q31 assign R/S

Discussion week 4 page 55 Q2 H-a right

Q32 assign R/S

Discussion week 4 page 55 Q2 H left

Q33 chair

Note 11 back page example 2

Q34 meso

Discussion week 4 page 56 Q3 10th pair

Q35 chair

Q34 practice with chair conformation

Q26 chair conformation

Note 11 (less stable one)

Q27 chair

Note 11 (more stable one)

Q28 R/S

R/S common mistake

Q29 stereochemistry

R/S what if the least priority group is in the plane of paper?

Q30 assign R/S

Discussion week 4 page 55 Q2 H right

Q21 SN1

Practice midterm 1 (Dr. Nasiri) Q3b

Q22 more SN1

Practice midterm 1 (Dr. Nasiri) Q3

Q23 Resonance

Discussion quiz 1a Question 2

Q24 Mechanism writing

Textbook question Ch3 Q27

Q25 Newmann

Question propsed by students

Q16 Resonance

Discussion week 2 practice Q1 question D

Q17 Note 07 & 08 clarification

What are we doing in note 08?

Q18 Resonance

Problem set 1 Q1c Why N in amide is sp2?

Q19 Hybridization

Problem set 1 Q5 compound D

Q20 Halogenation

Practice midterm 1 (Dr. Nasiri) Q3a

Q11 Resonance

Discussion week 1 practice Q4 question B

Q12 Resonance

Discussion week 1 practice Q4 question S

Q13 Resonance

Problem set 1 Q3d

Q14 Hybridization

Discussion week 2 practice Q1 question A

Q15 Hybridization

How to count electron group?

Q6 Resonance

Discussion week 1 practice Q4 question O

Q7 Resonance

Resonance of propene (with model building)

Q8 Newmann

Why eclipsed conformer is not favored

Q9 Resonance

Discussion week 1 practice Q4 question K

Q10 Resonance

Discussion week 1 practice Q4 question R

Q1 Resonance

Lecture 03 back page

Q2 Resonance

Lecture 03 back page - Sextet

Q3 Resonance

Textbook Question 1-11

Q4 Resonance

When N will have a negative? + Resonance with a five member ring

Q5 Resonance

Continue Q4 of Resonance with a five member ring

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