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chemistry > Alkyl halides > Flashcards

Alkyl halides Flashcards

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1
Q

catalyst used during reaction of alcohol with HX

A

ZnCl2

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2
Q

alcohol with phosphorous trihalides

A

phosphorous acid and alkyl halide

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3
Q

alcohol with phosphorous pentahalides

A

alkyl halide POX3 and HX

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4
Q

impure method of preparation

A

free radical substitution/halogenation

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5
Q

what decides the reactivity of alkyl halides

A

bond energy

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6
Q

what decides reactivity when electrophile is attacking

A

bond polarity

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7
Q

alkyl halides mostly undergo

A

nucleophilic substitution reactions

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8
Q

carbo cation is formed in

A

Sn1 E1 addition to alkenes and alkynes

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9
Q

the most bad leaving group

A

alkoxide ion

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10
Q

favoured in polar solvents unimolecular two stepped reaction

A

Sn1

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11
Q

Sn1 mechanism reactants and products

A

tertiary alkyl halides 50% retention and inversion

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12
Q

B elimination reaction reactant

A

alcoholic KOH results in alkene

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13
Q

increase in temp and decrease in polarity favours

A

elimination reaction

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14
Q

more basic medium then

A

E2 is major mechanism

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15
Q

sodium in dry ether gives alkanes

A

wurtz synthesis

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16
Q

Zn with aqueous acid

A

reduces alkyl halides

17
Q

anti knocking agents in gasoline

A

tetramedyl and tetra ethyl lead

18
Q

tetramedyl and tetra ethyl lead formed by

A

alkyl halide with Na4Pb

19
Q

the 3 worst leaving groups

A

OH
amino group -NH2
alkoxide ion

20
Q

the 3 best leaving groups

A

ammonia
Para sulfite toluene
iodine

chemistry (4 decks)

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