Quiz 2

25 July 2022
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question
What is the general formula for an alkene
answer
CnH2n
question
What is the general formula for an alkyne
answer
CnH2n-2
question
What is the geometry expected around a carbon atom in the bond of an alkene?
answer
120 degrees
question
Which compound corresponds to an unsaturated hydrocarbon?
answer
4-octene
question
Which of the following fatty acids is predicted to have the highest melting point?
answer
CH3(CH2)14COOH
question
What configuration does the following molecule have?
What configuration does the following molecule have?
answer
trans
question
Are the structures shown considered constitutional isomers, cis-trans isomers, the same molecules or are not related?
Are the structures shown considered constitutional isomers, cis-trans isomers, the same molecules or are not related?
answer
cis-trans isomers
question
Which of the following compounds can exist as cis-trans isomers?
answer
2-pentene
question
What is the correct IUPAC name for the compound shown here?
What is the correct IUPAC name for the compound shown here?
answer
1,1-dichloroethene
question
What is the correct IUPAC name for the compound shown here?
What is the correct IUPAC name for the compound shown here?
answer
6-methyl3-octene
question
What is the correct IUPAC name for the compound shown here?
What is the correct IUPAC name for the compound shown here?
answer
4-isopropyl-2-methyl-1-nonene
question
What is the correct IUPAC name for the compound shown here?
What is the correct IUPAC name for the compound shown here?
answer
cis-3-octene
question
What is the correct IUPAC name for the compound shown here?
What is the correct IUPAC name for the compound shown here?
answer
cis-2-pentene
question
What is the correct IUPAC name for the compound shown here?
What is the correct IUPAC name for the compound shown here?
answer
trans-3 octene
question
What is the correct IUPAC name for the compound shown here?
What is the correct IUPAC name for the compound shown here?
answer
2-methyl-1,3-butadiene
question
What is the correct IUPAC name of the compound shown here?
What is the correct IUPAC name of the compound shown here?
answer
1,4-pentadiene
question
What is the correct IUPAC name for the compound shown here?
What is the correct IUPAC name for the compound shown here?
answer
1,3-cyclopentadiene
question
The reaction of an alkene with water produces what type of product?
answer
alcohol
question
What type of reaction converts 4-decene into decane?
answer
hydrogenation
question
Which of the following reaction conditions results in Markovnikov addition to an unsymmetrical alkene?
answer
HBr: The addition of HBr to an unsymmetrical alkene is a regioselective reaction that proceeds through the most stable carbocation intermediate. The bromide ion will act as a nucleophile to add to the electrophilic carbocation with hydrogen adding to the less substituted carbon following Markovnikov's regioselectivity.
question
The reaction of 1-butene and hydrogen in the presence of a Pd catalyst produces?
answer
butane
question
What is the major product of the reaction of 2-hexene with bromine?
answer
2,3-dibromohexane
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What is the major product formed from the reaction of 3-hexene and HCl?
answer
3-chlorohexane
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What is the major product of the reaction shown below?
What is the major product of the reaction shown below?
answer
2-chloropropane
question
What reagents are required to convert ethene to ethane
answer
H2
question
What is the IUPAC name of the compound shown here?
What is the IUPAC name of the compound shown here?
answer
4-methyl-2-pentyne
question
What is the angle expected around a carbon atom in the triple bond of an alkyne?
answer
180 degrees
question
Which compound corresponds to an unsaturated hydrocarbon?
answer
2-pentyne
question
What type of product is formed in the hydration of 1-butyne?
answer
ketone
question
What is the name of the alkyne shown here?
What is the name of the alkyne shown here?
answer
1-bromo-1-butyne
question
Name the structure shown here?
Name the structure shown here?
answer
3-methyl-1-pentyne
question
What is the correct IUPAC name for the compound shown here?
What is the correct IUPAC name for the compound shown here?
answer
6,6-diethyl-3-octyne
question
What is the expected product from the addition reaction of excess HBr to 2-butyne?
answer
2,2-dibromobutane
question
What is the IUPAC name for the compound shown here?
What is the IUPAC name for the compound shown here?
answer
1-bromo-3-hexyne
question
What unstable intermediate is formed in the hydration of an alkyne?
answer
enol
question
The reaction of 2-pentyne with excess hydrogen gas in the presence of Pd produces what compound?
answer
pentane -will add two hydrogen molecules to the triple bond, reducing it completely to a single bond. The product will be pentane.
question
What is used to describe the arrangement of the substituents on the benzene in the compound shown?
What is used to describe the arrangement of the substituents on the benzene in the compound shown?
answer
para (1,4)
question
Which of the following describes the arrangement of the substituents in the compound shown ?
Which of the following describes the arrangement of the substituents in the compound shown ?
answer
ortho (1,2)
question
What type of functionality does phenol contain besides aromatic ring?
answer
hydroxy
question
Provide an explanation for why the structure of benzene is often depicted as shown, with a circle representing the electrons inside the ring, rather than alternating single and double bonds.
answer
benzene exist as two equally contributing resonance structures.-The bond lengths are an average of a single bond and a double bond, with the electrons moving in a circle.
question
The term aromatic is a structural term that applies to cyclic conjugated molecules that are planar and lack alkene like reactivity due to enhanced resonance stabilization. Which of the following compounds is not classified as an aromatic compound?
answer
cyclohexadiene
question
What is the molecular formula for the aromatic compound naphthalene shown here?
What is the molecular formula for the aromatic compound naphthalene shown here?
answer
C10H8-The intersection of two lines represents a carbon atom and each carbon atom must have four bonds total, therefore one hydrogen atom is attached to each carbon in the skeletal structure of naphthalene, expect at the ring fusion.
question
What is the common name for 1,2-dimethylbenzene?
answer
ortho-xylene
question
What is the correct common name for the compound here?
What is the correct common name for the compound here?
answer
para-dichlorobenzene
question
What is the correct IUPAC name for the compound shown here?
What is the correct IUPAC name for the compound shown here?
answer
1,3,5-trimethylbenzene
question
What is the correct IUPAC name for the compound shown here?
What is the correct IUPAC name for the compound shown here?
answer
1-bromo-3-chlorobenzene
question
An alkene hydrocarbon readily undergoes a hydrogenation reaction to afford an alkane in the presence of hydrogen gas (H₂) and a metal catalyst. Explain why benzene cannot be hydrogenated under similar conditions.
answer
Benzene is especially stabilized due to resonance. Therefore it does not readily undergo hydrogenation or other types of reactions that are typical for alkene hydrocarbons.
question
What reagents are required to accomplish the following reaction?
What reagents are required to accomplish the following reaction?
answer
HNO3, H2SO4, heat
question
Which of the following is the major product of the reaction between benzene and bromine in the presence of FeBr₃ catalyst?
answer
bromobenene
question
What type of reactions does benxene commonly undergo?
answer
substitution- Most reactions of benzene involve replacing one of the ring hydrogens with some other group, so this is a substitution reaction.
question
What is the correct IUPAC name for the compound shown here?
What is the correct IUPAC name for the compound shown here?
answer
4-bromo-1-butene
question
What is the expected product from the addition reaction of cyclohexene with chlorine (Cl₂)?
answer
1,2-dichlorocyclohexane
question
What is the major product of the reaction shown here?
What is the major product of the reaction shown here?
answer
cyclohexane
question
What reagents are required to convert 1-butene to 2-bromobutane?
answer
HBr
question
Which of the following reactions would form 2-bromobutane as the major product?
answer
2-butene + HBr
question
What is the correct IUPAC name for the compound shown here?
What is the correct IUPAC name for the compound shown here?
answer
3,3-dichloro-1-propyne
question
What is the expected product from the addition reaction of one equivalent of HBr to 1-hexyne?
answer
2-bromo-1-hexene