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chem > haloalkanes and haloarenes > Flashcards

haloalkanes and haloarenes Flashcards

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1
Q

from alkanes

A

halogenation

with so2cl2 RX+SO2CL2—> RCl+SO2+HCl

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2
Q

from alkenes

A

by electrophilic addition

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3
Q

from alcohols

A
  • by addition of halogen acids
  • using pcl5 and pcl3
  • action of thionyl chloride (socl2) in presence of pyridine -darzens process
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4
Q

from silver salt of carboxylic acids-hunsdiecker

A

decarboxylation by free radical mechanism

RCOO-Ag+ Br-Br–> R-Br+CO2

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5
Q

finkelstein reaction(halide exchange method)

A

R-X+NaI–> R-I +NaX

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5
Q

finkelstein reaction(halide exchange method)

A

R-X+NaI———> R-I +NaX

acetone

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6
Q

swarts reaction

A

ch3cl+hg2f2—>

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7
Q

other methods

A

ROR+PCl5
RMgX+X2
RNH2+SOCl2—> RX+N2+H2O

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8
Q

miscellaneous imp reactions

A

reduction Zn/Hcl or Na or alc or Zn/Cu couple or LiAlH4 or Pd-C
Wurtz- Na and dry ether
reaction with magnesium- to form Grignard reagent
Friedel crafts AlCl3
substitution (halogenation)

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9
Q

elimination reactions examples

A

alcoholic koh

action of heat

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10
Q

haloarenes formation

A

direct halogenation in presence of lewis acid
diazonium salts
hunsdiecker
aryl thalium
rashchig- chlorobenzene in presence of cu2cl2

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11
Q

haloarenes chemical properties

A 
nucleophilic displacement
electrophilic substitutions
wurtz fittig reactions
 formation of grignard reagent
ullmann reaction
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