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chemistry > haloalkanes and haloarenes > Flashcards

haloalkanes and haloarenes Flashcards

1
Q

allylic halide

A

X bonded to sp3 carbon adjacent to double bond carbon

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2
Q

benzylic halide

A

halogen atom bonded to sp3 carbon attached to aromatic ring

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3
Q

vinylic halide

A

halogen bonded yo sp2 carbon of a C=C

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4
Q

ROH+HCL (In presence of ZnCl2)

A

RCL+H20

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5
Q

ROH+NaBr+H2SO4

A

RBr+NaHSO4+H2O

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6
Q

3ROH+PX3

A

3RX+H3PO3
X= Cl/Br

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7
Q

ROH -> (presenve of Red P/X2) where X is Br or I

A

RX

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8
Q

ROH+SOCl2

A

RCL + HCL + SO2

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9
Q

free radical halogenation of alkanes gives

A

complex mixture of isomeric moni and poly haloalkanes

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10
Q

free radical halogenation of alkanes gives

A

complex mixture of isomeric moni and poly haloalkanes

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11
Q

alkene + HX product is determined using

A

markovnikovs rule

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12
Q

finkelstein rxn

A

RX+NaI->RI+NaX

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13
Q

finkelstein rxn

A

RX+NaI->RI+NaX

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14
Q

Swarts rxn

A

CH3Br+AgF->CH3+AgBr

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15
Q

ArCh3 (aromatic) + X2 (Fe/dark)->

A

o- and p- halotoulene

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16
Q

Sandmeyers rxn

A

.

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17
Q

Sandmeyers rxn

A

.

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18
Q

volatile halogen compounds have

A

sweet smell

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19
Q

volatile halogen compounds have

A

sweet smell

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20
Q

bp dec/inc with branchin

A

dec

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21
Q

why do p- isomers have high melting than o and m-

A

due to their symmetry, they fit better in lattice

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22
Q

density increases with-

A

increase in C atoms, X atoms and atomic mass of X atoms

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23
Q

density increases with-

A

increase in C atoms, X atoms and atomic mass of X atoms

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24
Q

haloalkanes are more solube in orhanic solvents or water

A

org solvents

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25
Q

ambident nucleophiles

A

posses two nucleophilic centres

26
Q

Sn2 follows _ order kinetics

27
Q

in sn2, how many reactants does the ror depend on?

28
Q

in which nucleophilic subs rxn is an intermediate formed

29
Q

sn2 gives rise to _ product

30
Q

order to reactivity in sn2

31
Q

which type of reactants are used in sn1 rxn

A

polar protic

32
Q

kinetics in sn1

A

first order

33
Q

carbocation is formed in which subs. nucleophilic rxn

34
Q

order or reactivity of halides in subs nucleophilic

A

ri>rbr>rcl»rf

35
Q

racemic mix is produced in

36
Q

elimination rxn basic mechanism

A

when a haloalkanes with beta hydrogen is heated with alc.KOH, there is elimination of H atom from beta C and an X atom from alpha C atom

37
Q

saytzeff rule

A

alkene which has more alkyl grps attached to double bonded C atoms is the main product

38
Q

RMgX+H2O

A

RH+Mg(OH)X

39
Q

wurtz rxn

A

2RX+2Na->RR+2NaX

40
Q

why are aryl halides extremely less reactive towards nucleophilic subs

41
Q

chlorobenzene can be converted into phenol by ?

A

(i) NaOH (heat) (ii) H+

42
Q

at which positions does presence of EWG increase reactivity of haloarenes

A

para and ortho

43
Q

wurtz fittig rxn

A

Ar-X+Na+Rx gives Ar-R+NaX

44
Q

fittig rxn

A

2Ar-X+2Na (dry ether) gives diphenyl

45
Q

Halogen atom is ____ directing

46
Q

halogen atom due to _ effect has tendency to withdrow electrons

47
Q

Halogenation

A

Ar-Cl+Cl2 (anhyd FeCl3) gives 1,4 dichlorobenzene (maj) and 1,2 dichlorobenzene

48
Q

friedel crafts rxn

49
Q

dichloromethane usage

A

paint remover, propellant in aerosols, process solvent in manufacture of drugs, metal cleaning finishing solvent

50
Q

methylene chloride harms

51
Q

use of chloroform

A

solvent for fats, alkaloids, iodine etc and in production of freon refrigerant r 22
prev used as anaesthetic

52
Q

which poisonous gas is formed by chloroform and how

A

phosgene, slow oxidation by air in presence of light
phosgene=carbonyl chloride, COCl2

53
Q

iodoform was earlier used as an

A

antiseptic

54
Q

carbon tetrachloride used in manufacture of

A

refrigerants and propellants for aerosol cans

55
Q

_ depletes ozone layer

56
Q

freons are

A

chlorofluorocarbon compounds of methane and ethane

57
Q

most common freon in industries

A

freon 12 (CCl2F2)

58
Q

freon 12 is produced by

A

swarts rxn of tetrachloromethane

59
Q

chem behaviour of freons

A

stable, non toxic, unreactive

60
Q

ddt full form

A

p,p’-dichlorophenyl-trichloro-ethane

61
Q

first chlorinated organic insecticide

chemistry (7 decks)

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