Halogenoalkanes

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What are the prefixes for the different halogenoalkanes
Fluoro,chloro,bromo,iodo
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What is the mechanism called for the reaction of halogenoalkanes
Substitution or elimination
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what is a nucleophile
A substance that has a lone pair of electrons or one that is an electron pair donor
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what is a substitution reaction
swapping a halogen atom for another group of atoms
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why do we use curly arrows in the mechanism
To show the movement of the lone pair of electrons
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what do the nucleophiles do to the carbon atom in the mechanism
They attack the carbon which is attached to the halogen
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What does the rate of substitution depend on
The strength of the C-X bond the weaker the bond the easier it is to break the bond
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which of the haloalkanes are fastest to susbtitute
iodoalkanes
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which of the haloalkanes are slowest to substitute
fluoroalkanes
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what is formed when aqueous silver nitrate is combined with a haloalkane
silver halide precipitate
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If a precipitate is formed quickly what does this say about the substitution reaction
The substitution reaction will be quicker and the haloalkane will be more reactive
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what are the three types of reagent used in a substitution reaction
cyanide ions,hydroxide ions and ammonia
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what does an elimination reaction involve
The removal of a small organic molecule usually water
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what usually happens in an elimination reaction
The bond is broken turning it into an alkene
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what are the compounds that cause a hole in the ozone
CFCs
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How do chlorine atoms lead to the decomposition of the atmosphere
They catalyse the reaction because they are regenerated and provide an alternative route with lower activation energy
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What are the new compounds called used in refrigerators
HFCs
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Card 2

Front

What is the mechanism called for the reaction of halogenoalkanes

Back

Substitution or elimination

Card 3

Front

what is a nucleophile

Back

Preview of the front of card 3

Card 4

Front

what is a substitution reaction

Back

Preview of the front of card 4

Card 5

Front

why do we use curly arrows in the mechanism

Back

Preview of the front of card 5
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