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chem 246 > Exam 3 > Flashcards

Exam 3 Flashcards

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1
Q

what does mCPBA do in a rxn

A

adds Oxygen between double bond like a dart

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2
Q

what does H2SO4 and H2O add in a rxn

A

adds OH and H (H goes to least stable)

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3
Q

what kind of products do H2SO4 and H2O yield in a rxn

A

trans markovnikov

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4
Q

what kind of products to BH3 and H2O2/NaOH yield in a rxn

A

anti-markovnikov

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5
Q

what would it look like if there were two OH groups on neighboring carbons in a ring where OsO4 and NMO are reagents

A

OH are cis

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6
Q

what would it look like if there were two OH groups on neighboring carbons in a ring where mCPBA, H2SO4, H2O are reagents

A

OH are trans

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7
Q

what is initiation

A

no radical to one radical

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8
Q

what is propagation

A

radical moves

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9
Q

what is termination

A

one radical to no radical

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10
Q

what does O3 do

A

breaks double bond in two

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11
Q

what does KMnO4 do

A

acts like O3 but adds alcohol

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12
Q

to add 2 Br to alkene but 4 to alkyne add..

A

Br2

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13
Q

to add 1 Br to alkene but 2 to alkyne add..

A

HBr

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14
Q

what does OsO4 do

A

turns to single bond

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15
Q

what does NaIO4 do

A

splits carbon bond

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16
Q

explain how acidic rxn occurs

A

e- from O move to make double bond, e- from double bond move to break bond and go to H+, then e- from bond go to oxygen to neutralize and H+ goes to H2O to yield ketone and H3O+

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17
Q

what yields when Lindlar’s catalyst is used

A

cis alkene from alkyne

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18
Q

what yields when Li, NH3 used

A

trans alkene from alkyne

19
Q

what kind of reaction occurs with KOtBu

A

E2

20
Q

what are base molecules we might see

A

c4h9o-, k+

21
Q

what are molecules that are both basic and nucleophilic

A

OH- and MeO-

22
Q

what are nucleophilic molecules we might see

A

NaCN, NaN3, NaOAc

23
Q

what reactions will never be elimination

A

one carbon

24
Q

when there is a base and nucleophile, what reaction will CH3X yield

A

Sn2

25
Q

when there is a base only, what reaction will CH3X yield

A

Sn2

26
Q

when there is a nucleophile only, what reaction will CH3X yield

A

Sn2

27
Q

when there is neither a base or nucleophile, what reaction will CH3X yield

A

none

28
Q

when there is a base and nucleophile, what reaction will a primary carbon yield

A

Sn2/E2

29
Q

when there is a base and nucleophile, what reaction will a secondary carbon yield

A

Sn2/E2

30
Q

when there is a base and nucleophile, what reaction will a tertiary carbon yield

A

E2

31
Q

when there is a base only, what reaction will a primary carbon yield

A

E2

32
Q

when there is a base only, what reaction will a secondary carbon yield

A

E2

33
Q

when there is a base only, what reaction will a tertiary carbon yield

A

E2

34
Q

when there is a nucleophile only, what reaction will a primary carbon yield

A

Sn2

35
Q

when there is a nucleophile only, what reaction will a secondary carbon yield

A

Sn2

36
Q

when there is a nucleophile only, what reaction will a tertiary carbon yield

A

none

37
Q

when there is neither a base or nucleophile, what reaction will a primary carbon yield

A

none

38
Q

when there is neither a base or nucleophile, what reaction will a secondary carbon yield

A

Sn1/E1

39
Q

when there is neither a base or nucleophile, what reaction will a tertiary carbon yield

A

Sn1/E1

40
Q

what does POCl3, pyr do

A

talkes alcs to alkenes in E2 rxn

41
Q

what does PBr3 do

A

takes alcs to Br in Sn2

42
Q

what does SOCl2 do

A

takes alcs to Cl in Sn2

43
Q

what does adding NaNH2/NaNH3 do? how do you treat?

A

adds carbon … treat with carbon group and chloride

chem 246 (7 decks)

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