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Organic Chemistry > 8-Alkyl Halides and Elimination Reactions > Flashcards

8-Alkyl Halides and Elimination Reactions Flashcards

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1
Q

Alkyl halides undergo ____ reactions with BRONSTED-LOWRY BASES

A

elimination reactions

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2
Q

the CIS isomer has two groups on the ____ side of the double bond

A

same

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3
Q

the TRANS isomer has two groups on the ____ side of the double bond

A

opposite

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4
Q

increasing the number of R groups (increases/decreases) stability

A

increases

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5
Q

E2 Mechanism

kinetics?

A

second order

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6
Q

E2 Mechanism

mechanism

A

one step

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7
Q

E2 Mechanism

identity of R and rate

A

R3CX > R2CHX > RCH2X

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8
Q

E2 Mechanism

base

A

favored by strong bases

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9
Q

E2 Mechanism

Leaving group

A

better leaving group -> .faster reaction

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10
Q

E2 Mechanism

Solvent (polar protic/aprotic)

A

polar apotic

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11
Q

the rate of the E2 reaction (increases/decreases) as the strength of the base (increases/decreases)

A

increase-increase or decrease-decrease

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12
Q

the major product in beta elimination has a (less/more) substituted double bond

A

more

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13
Q

Vocab:

then a reaction yields prodominantly or exclusively one CONSTITUTIONAL isomer when more than one is possible

A

regioselective

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14
Q

Vocab:

when a reaction forms predominantly one or exclusively one STEREOISOMER when two or more are possible

A

stereoselective

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15
Q

E1 Mechanism

kinetics

A

first order

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16
Q

E1 Mechanism

mechanism

A

two steps

17
Q

E1 Mechanism

identity of R and rate

A

R3CX > R2CHX > RCH2X

18
Q

E1 Mechanism

base

A

favored by weaker bases

ie H2O and ROH

19
Q

E1 Mechanism

leaving group

A

better leaving group makes the reaction faster

20
Q

E1 Mechanism

solvent

A

polar protic solvents

21
Q

Vocab:

H and X atoms oriented on the SAME side of the molecule

A

syn periplanar

22
Q

Vocab:

H and X atoms oriented on OPPOSITE sides of the molecule

A

anti periplanar

23
Q

E2 elimination reactions (with alkyl halides) favor what type of geometry?

A

anti periplanar

Organic Chemistry (6 decks)

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