Chemistry AQA AS Unit 2 Haloalkanes

Made these notes for my year 12 summer exam to revise and read over. There are spelling mistakes in most of my files but due to the busy exam schedule I had no time to correct them (sorry).

Most files have more information than what is needed but I feel it helps you feel more confident walking into the exam if you have a greater knowledge background and may help when having to apply knowledge to questions. Good luck :)

Hide resource detailsShow resource details Download Chemistry AQA AS Unit 1 Periodicity (Word Document 36.87 Kb.)

Share:

HideShow resource information
  • Created by: Chelcie
  • Created on: 02-09-13 13:35

Pages in this set

Page 1

Preview of page 1
Haloalkanes
GENERAL FORMULA
CnH2n+1X

NAMING HALOALKANES
F ­ Fluro
Cl- Chloro
Br- Bromo
I - Iodo

BOND POLARITY
Haloalkanes have a C ­ X bond.
The bond is polar, C + and X ­ as halogens are more electronegative than carbon.

SOLUBILITY
The polar bonds are not polar enough to…

Page 2

Preview of page 2
INITIATION STEP:
U/V light for high energy. It breaks the halogens covalent bond.
This is HOMOLYTIC FISSION where the bond is broken evenly
to form 2 free radicals. Each atom acquires one electron from the covalent bond.



PROPAGATION STEP
2 parts that can continue until 1 reaction runs
out.
The…

Page 3

Preview of page 3
Alkyl Halide Aq NaOH

AgNO (aq) + X (aq) AgX (s) + NO (aq)
Precipitate




MECHANISM: Nucleophilic
HETEROLYTIC FISSION: Uneven breaking of a covalent bond resulting in a positive and negative ion.

CURLY ARROW ­ movement of pair of es
Starts at the lone pair or bond, goes to the…

Page 4

Preview of page 4
Conditions: Excess ammonia, under pressure.




ELIMINATION REACTION

Removing an atom/group of atoms.
From a haloalkane to an alkene.
Use ethanoic Na/KOH (a solution in
ethanol)
Anhydrous (no water present, only
given as product)
Heat it



Mechanism:
1) The electron pair are withdrawn to Br
2) The Nucleophile donates a lone…

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »