ACS ORGANIC CHEMISTRY EXAM 2025
ACTUAL QUESTIONS AND ANSWERS GRADED
A+
What is PCC in DCM?
Used in oxidation of primary alcohols to aldehydes; and oxidation of secondary
alcohols to ketones ; usually used to oxidize alcohols into carbonyl compounsd
What is the Wittig reaction?
Reaction which involves the reaction of an aldehyde or ketone; The phosphoran
(PH3P= CR3R4 can be used to produce an alkene, but then proceed to form an
unstable 4 membered ring.
What happens after phosphonium ylide is added to a ketone or aldehyde?
Alkene CH2 is formed; PH3P=O by product.
What happens when MCPBA is added to an alkene?
Forms into an epoxide!!
,What happens when an workup is applied to an epoxide?
OH OH; BREAKS apart the ether
Why do we use AlCl3 in Friedel Crafts- Alkylation?
Good lewis acid catalyst
What do the reagents KOH and hydrazine (NH2NH2) do?
Wolff Kischner reduction; used to convert carbonyl functionalities into methylene
groups; forms R,R=N-NH2 ; or just CH2!! The imine intermediate forms tho
What is the imine formation?
Benzene ring double bonded N-NH2
What is the polymer Nylon 6,6 made from?
Polyamide ; 6 long carbonyl at each end of the chain; 4 carbons in between each of
them; then 6 carbons in between each amine group
What is the polymer polyurethane made from?
,Alcohol , isocyanate, and ester like amide like thing. (RCOONHR)
What is the polymer phenol-formaldehyde made form?
phenol group, formaldehyde
What is the polymer nylon 6 made from?
COOH (CH2)5 and NHCOCH25NH2
How is Dacron, a polymer made?
HOCH2CH2OH ; dicarboxylic acid with benzene in between total chain looks like
O-CH2-CH2-O-COC6H4-CO
When naming carboxylic acids
find the longest continuous carbon atom chain contianing the carboxylic acid group
What is the prefix in carboxylic acids?
-oate
, To name an ester,
identify the alkyl group that is in the 'alcohol' portion of the molecule and name it;
then identify the acid part of the molecule. The ester is named with the alkyl part
first, and the acid part is named as a carboxylate.
The terms ortho, meta, and para are used when benzene derivatives possess
exact 2 subsituents
Is a structure with more or less covalent bonds more stable?
More covalent bonds is more stable
What is the downside to separation of charges?
Separation of charges cost energy and results in a less stable resonance contributor
What does the nitrate ion look like lewis structure?
The bonding pi orbital is lower in energy than antibonding orbital (T/F)?
ACTUAL QUESTIONS AND ANSWERS GRADED
A+
What is PCC in DCM?
Used in oxidation of primary alcohols to aldehydes; and oxidation of secondary
alcohols to ketones ; usually used to oxidize alcohols into carbonyl compounsd
What is the Wittig reaction?
Reaction which involves the reaction of an aldehyde or ketone; The phosphoran
(PH3P= CR3R4 can be used to produce an alkene, but then proceed to form an
unstable 4 membered ring.
What happens after phosphonium ylide is added to a ketone or aldehyde?
Alkene CH2 is formed; PH3P=O by product.
What happens when MCPBA is added to an alkene?
Forms into an epoxide!!
,What happens when an workup is applied to an epoxide?
OH OH; BREAKS apart the ether
Why do we use AlCl3 in Friedel Crafts- Alkylation?
Good lewis acid catalyst
What do the reagents KOH and hydrazine (NH2NH2) do?
Wolff Kischner reduction; used to convert carbonyl functionalities into methylene
groups; forms R,R=N-NH2 ; or just CH2!! The imine intermediate forms tho
What is the imine formation?
Benzene ring double bonded N-NH2
What is the polymer Nylon 6,6 made from?
Polyamide ; 6 long carbonyl at each end of the chain; 4 carbons in between each of
them; then 6 carbons in between each amine group
What is the polymer polyurethane made from?
,Alcohol , isocyanate, and ester like amide like thing. (RCOONHR)
What is the polymer phenol-formaldehyde made form?
phenol group, formaldehyde
What is the polymer nylon 6 made from?
COOH (CH2)5 and NHCOCH25NH2
How is Dacron, a polymer made?
HOCH2CH2OH ; dicarboxylic acid with benzene in between total chain looks like
O-CH2-CH2-O-COC6H4-CO
When naming carboxylic acids
find the longest continuous carbon atom chain contianing the carboxylic acid group
What is the prefix in carboxylic acids?
-oate
, To name an ester,
identify the alkyl group that is in the 'alcohol' portion of the molecule and name it;
then identify the acid part of the molecule. The ester is named with the alkyl part
first, and the acid part is named as a carboxylate.
The terms ortho, meta, and para are used when benzene derivatives possess
exact 2 subsituents
Is a structure with more or less covalent bonds more stable?
More covalent bonds is more stable
What is the downside to separation of charges?
Separation of charges cost energy and results in a less stable resonance contributor
What does the nitrate ion look like lewis structure?
The bonding pi orbital is lower in energy than antibonding orbital (T/F)?
