Final Flashcards

1
Q

What reagents are used to remove two halides from an alkane and form a alkyne

A

3 equivalent NaNH2 and water

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2
Q

What reagents are used in alkylation and what results from it

A

NaNH2 and xI where x is what is being added to the alkyne

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3
Q

What are the three ways to reduce an alkyne

A

Markovnikow addition, Anti-markovnikov addition, and using platinum

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4
Q

What are the reagents for reduction of an alkyne via markovnikov addition and what structure is made

A

H2 and Lindlar’s catalyst makes a cis alkene

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5
Q

What are the reagents for reduction of an alkyne via anti-markovnikov addition and what structure is made

A

Na and NH3 make a trans alkene

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6
Q

What are the reagents for a reduction of a alkyne using platinum and what structure is made

A

platinum (pt) and H2 get rid of all pi bonds

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7
Q

what are the reagents used for the hydration of a alkyne via markovnikov addition (acid-catalyzed hydration) and what structure is made

A

H2SO4 and HgSO4 makes a ketone from an enol

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8
Q

what are the reagents used for the hydration of a alkyne via anti-markovnikov addition (hydro-boration oxidation) and what structure is made

A

BH3, THF and H2O2, NaOH make an aldehyde from an enol

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9
Q

What happens as a result of a Sn2 reaction

A

chiral centers are flipped

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10
Q

What happens as a result of a Sn1 reactions

A

enantiomers are made

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11
Q

What are the reagents for a markovnikov hydroboration of an alkene and what results from it

A

HX and can rearrange to put x on the most substituted carbon

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12
Q

What are the reagents for an anti markovnikov hydroboration of an alkene and what results from it

A

HBr and ROOR and puts Br on the least substituted carbon

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13
Q

What are the reagents for hydration of a alkene and what results from it

A

H2O and H2SO4, put OH on the most substituted carbon

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14
Q

What are the reagents for halogenation of an alkene and what results from it

A

X2 and puts them on in anti addition (up and down but different carbons)

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15
Q

What are the reagents of a halohydrin reaction of an alkene and what results from it

A

H2O and X, puts OH on the more substituted carbon and Br on the least substituted carbon, anti-addition

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16
Q

What are the reagents of an oxymercuration reduction of an alkene and what results from it

A

Hg(AOc)2, H2O and NaBH4, puts OH on the more substituted carbon

17
Q

What are the reagents of a hydroboration reduction of an alkene and what results from it

A

BH3, THF and H2O2, NaOH, puts OH on the less substituted carbon, anti addition

18
Q

What are the reagents of a dihydroxylation of an alkene and what results from it

A

OsO4 and H2S puts 2 OHs on syn addition

19
Q

What are the reagents of a hydrogenation of an alkene and what results from it

A

H2 and Pt, puts Hs on, syn addition

20
Q

What are the reagents of ozonolysis of an alkene and what results from it

A

O3 and DMS, break pi bond into 2 pi bond adding O to the ends

21
Q

What does adding NaNH2 to an alkane do

A

Removes halogens to make double/triple bond

22
Q

What does adding Na and NH3 (l) do to an alkyne

A

removes a pi bond and makes the molecule trans

23
Q

What are the factors that promote a Sn1 reaction and what is the RDS

A

RDS is formation of a carbocation, and factors are weak base for LG, polar and protic solvents

24
Q

What are the factors that promote a Sn2 reaction and what is the RDS

A

Not really RDS since everything happens at the same time and factors are a weak base for LG, steric hinderance slows reaction, and aprotic solvents but can work with protic ones

25
What are the factors that promote an E1 reaction and what is the RDS
RDS is formation of a carbocation, and factors are polar, protic solvents, and heat
26
What are the factors that promote a E2 reaction and what is the RDS
No RDS as everything happens at the same time, factors are polar aprotic solvents and better base faster reaction
27
Why are terminal alkynes much more acidic than alkanes
Alkynes have more character allowing Hs to be liberated more easily
28
What is the difference between protic and aprotic solvents
Protic solvents have hydrogens bonded to O or N while aprotic don't