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43 Cards in this Set
- Front
- Back
Alcohols contain the________
|
Hydroxyl functional group
-OH |
|
The alkoxy group is ___
|
-O-R'
|
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Alcohols are polar because _____
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OH bond is polarised
|
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Alcohols bond between molecules of alcohols via:
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Hydrogen bonding
|
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Primary alcohol is:
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end of hydrocarbon chain
|
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Secondary alcohol is:
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middle of hydrocarbon chain
|
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Tertiary alcohol is:
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Attached to carbon with no hydrogen
|
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Alcohols are oxidised by:
|
Acidified potassium dichromate
|
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Primary alcohol oxidation reagants and products:
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Acidified potassium dichromate
DISTILL for aldehyde REFLUX for carboxylic acid |
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Secondary alcohol oxidation reagents and products:
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Acidified potassium dichromate
Reflux for Ketone |
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Aldehyde suffix =
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-al
|
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Ketone suffix =
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one
|
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Carboxylic acid suffix =
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-oic acid
|
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Dehydration of alcohols is __
Conditions are __ |
Removal of water
Alumina at 300*C or heating with concentrated sulfuric acid |
|
For an aldehyde, the oxidising solution ( ___________) is:
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acidified potassium dichromate dripped slowly into hot alcohol and distilled off
|
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Carboxylic acids contain the_______________ group
|
Carboxyl group
|
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Ester group looks like:
|
O
|| -C-O-R' |
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Acyl chloride looks like:
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O
|| -C - Cl |
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Amides look like:
|
O
|| -C - NH2 |
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Acid anhydrides look like:
|
O
|| -C \ O / - C || O |
|
In order of OH goup acidity:
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ethanol<water<phenol<carboxylic acid
|
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OH group acidity varies because of
|
the stability of the R-O- ion
|
|
More stable R'-O- ions are ____ acidic
These arise because of: |
more
Arise because of delocalisation of electrons across the ion |
|
Iron chloride gives ______ when reacted with a ____
|
Iron chloride gives purple solution with a phenol
|
|
The test for a phenol is :
|
iron(III) chloride
Gives a purple complex with a phenol |
|
Esters are formed using:
|
Conc. Sulfuric acid - Reflux
-Acid anhydride of Acyl Chloride - Anhydrous (phenols) |
|
Ester suffix is -
|
-oate
|
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In an ester, the remaining O in the ester link is from the
|
alcohol
|
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CH3-CH2-O-C-CH3 would be named
|| O |
Ethyl Ethanoate
|
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Hydrolysis of esters goes to completion with
|
alkali i.e. dilute sodium hydroxide
|
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Hydrolysis of esters forms a carboxylate salt with
|
acid
|
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Dilute HCL hydrolysis of an ester does/does not__
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does not go to completion
|
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When a molecule interacts with electromagnetic radiation
|
it can vibrate, rotate, translate or electronic changes
|
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In infrared spectroscopy changes are in
|
vibrational energies of the molecules
|
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Wavenumber =
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1/wavelength :cm3
|
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Wavelength =
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h :um
|
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Frequency =
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v : Hz
|
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Vibrational changes cause bonds to
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Stretch
|
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In the machine, the infrared source is:
|
A heated filament
|
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Infrared energy is reflected through two samples which are:
|
-Sample solution
-Reference solution of solvent only |
|
Once passed through sample/reference, light passes through a
|
NaCl prism
|
|
The NaCl prism is chosen as:
Light passes through to the IR detector which records : |
It does not absorb IR light
Transmittance |
|
On an IR spectrum the baseling is at the___
|
top
|