Transcript ALCOHOLS - Chemistry Geek

ALCOHOLS
Corbin Frye, Taylor Galpern, Julie Ghekas
Alcohols in Action…
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Alcoholic beverages
Methanol and ethanol
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Industrial, medical
Perfumes/essences
Functional Group: Alcohols
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…a hydroxyl group (-OH) bound to a single
carbon atom.
General Formula: CnH2n+1OH
Identification of Alcohols
Naming Alcohol Groups
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Step 1: Find the alcohol (-OH)
Step 2: Name the parent chain
Step 3: Determine the carbon that the
alcohol is coming off of
Step 4: Drop the –e off the parent chain’s
name
Step 5: Add –ol to the end of the name
Step 6: The number can be placed before
name or between the parent chain and –ol
Variations to Alcohol Groups
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Can have multiple alcohol groups off of
one parent chain
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Named –diol, -triol, -tetraol, etc.
Don’t take off the last e on the parent
chain.
Ethylene glycol
2,3-butandiol
Variations cont…
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Can have parent chains other than
alkanes
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Named as alkenol, alkynol, benzenol
(phenol), etc.
Can have iso-, sec-, tert- in naming
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Names the carbon
that holds the alcohol
t-butanol
phenol
Examples
Practice Naming…
Answers…
ethanol
pentan-3-ol
Drawing…
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Step 1: draw parent chain; number of
carbons will be indicated by prefix (i.e.
meth, eth, prop…)
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Note bond type (i.e. -ene/-yne)
Step 2: find the number carbon the
group corresponds to
Step 3: draw the attached group
Examples…
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1-propanol
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2-methylhex-4-en-1,3-diol
Answers…
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1-propanol
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2-methylhex-4-en-1,3-diol
Priority…we’re #1
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Greatest in priority…
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Alcohols
Alkenes
Alkynes
Halides
Nitro
Alkanes
phenyl
Examples…
Answers…
3-methylpentan-2-ol
3,7-dimethyl-6-octen-1-ol