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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
ambident nucleophiles
posses two nucleophilic centres
26
Sn2 follows _ order kinetics
second
27
in sn2, how many reactants does the ror depend on?
both (2)
28
in which nucleophilic subs rxn is an intermediate formed
sn1
29
sn2 gives rise to _ product
inverted
30
order to reactivity in sn2
1>2>3
31
which type of reactants are used in sn1 rxn
polar protic
32
kinetics in sn1
first order
33
carbocation is formed in which subs. nucleophilic rxn
sn1
34
order or reactivity of halides in subs nucleophilic
ri>rbr>rcl>>rf
35
racemic mix is produced in
sn1
36
elimination rxn basic mechanism
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
saytzeff rule
alkene which has more alkyl grps attached to double bonded C atoms is the main product
38
RMgX+H2O
RH+Mg(OH)X
39
wurtz rxn
2RX+2Na->RR+2NaX
40
why are aryl halides extremely less reactive towards nucleophilic subs
.
41
chlorobenzene can be converted into phenol by ?
(i) NaOH (heat) (ii) H+
42
at which positions does presence of EWG increase reactivity of haloarenes
para and ortho
43
wurtz fittig rxn
Ar-X+Na+Rx gives Ar-R+NaX
44
fittig rxn
2Ar-X+2Na (dry ether) gives diphenyl
45
Halogen atom is ____ directing
o, p
46
halogen atom due to _ effect has tendency to withdrow electrons
-I
47
Halogenation
Ar-Cl+Cl2 (anhyd FeCl3) gives 1,4 dichlorobenzene (maj) and 1,2 dichlorobenzene
48
friedel crafts rxn
.
49
dichloromethane usage
paint remover, propellant in aerosols, process solvent in manufacture of drugs, metal cleaning finishing solvent
50
methylene chloride harms
human cns
51
use of chloroform
solvent for fats, alkaloids, iodine etc and in production of freon refrigerant r 22 prev used as anaesthetic
52
which poisonous gas is formed by chloroform and how
phosgene, slow oxidation by air in presence of light phosgene=carbonyl chloride, COCl2
53
iodoform was earlier used as an
antiseptic
54
carbon tetrachloride used in manufacture of
refrigerants and propellants for aerosol cans
55
_ depletes ozone layer
CCl4
56
freons are
chlorofluorocarbon compounds of methane and ethane
57
most common freon in industries
freon 12 (CCl2F2)
58
freon 12 is produced by
swarts rxn of tetrachloromethane
59
chem behaviour of freons
stable, non toxic, unreactive
60
ddt full form
p,p'-dichlorophenyl-trichloro-ethane
61
first chlorinated organic insecticide
ddt

chemistry (7 decks)

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