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Organic Chemistry > Chapter 14 Ethers.... > Flashcards

Chapter 14 Ethers.... Flashcards

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0
Q

Ethers have low boiling points due to a lacking of what intermolecular force

A

Hydrogen bonding

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1
Q

Ethers have low reactivity making them good what?

A

Solvents

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2
Q

Best at solvating what type of ion,

A

Cations

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3
Q

Crown ethers are used to do what

A

Encapsulate cations

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4
Q

Epoxides are

A

Three member ether rigs

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5
Q

Four member ether rings

A

Oxetanes

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6
Q

Five member ether rings are

A

Furanes

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7
Q

Six member ether rings

A

Pyrane

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8
Q

Williamson ether synthesis requires

A

Alkoxide and alkyl haylide

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9
Q

Can phenols be used as alkoxide or alkyl halide in Williamson ether synth.

A

Alkoxides

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10
Q

Why can’t phenols be used as alkyle halides in Williamson ether synth.

A

Hindrance from the ring structure doesn’t allow an SN2 attack by the alkoxide

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11
Q

Alkoxy murcuration requires what to create an ether

A

Hg(OAc)2 …mercury TWO acetate

An alcohol ….. ( NOT H2O )

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12
Q

Is Demucuration the same in ether synthesis as it is in alcohol synth?

What is needed

A

Yes.

Na BH4…. Sodium borohydride

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13
Q

Ethers will react with strong hydrohalic acids in XS to give

A

Two alkyl halides

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14
Q

In the cleavage of an ether with strong hydrohalic acids undergoes what reaction types

A

One SN2

One dehydration SN1

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15
Q

Diphenyl ethers will not undergo what reaction with strong acids

A

Cleavage

16
Q

What is a protection group

A

Lone functional group used to protect a functional group from reactions

17
Q

Deprotection is used when

A

When the reaction is concluded or when the Protected needs modification

18
Q

Epoxidation synthesis reacts what two reactants

A

An alkene

MCPBA or proxy acid.

19
Q

Epoxides are hydrated to yield

A

Anti di-ols

20
Q

Epoxides can react with acid and H2O to create diols. What is the other way to use Epoxides to make diols

A

1) . Use a hydroxide to attack the least substituted carbon on the Epoxides.
2) protonate the hydroxide

21
Q

What type of reactions create Epoxides

A

Base promoted cyclist ion of halogens

Epoxidation of alkenes with. MCPBA or peroxy acid

22
Q

Base promoted cyclization reacts a strong base with what to produce an Epoxides

A

Anti configured alcohalide

23
Q

Gringards always attack what carbon on an Epoxides

A

Least substituted

Organic Chemistry (8 decks)

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