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UTA ORGANIC CHEMISTRY I (BUGARIN) -
TEST TWO 2026 ACTUAL QUESTIONS
WITH VERIFIED ANSWERS.
R/S configurations cannot predict _____ - correct answer-
Whether a compound is dextrorotatory or levorotatory.
A solution with a 90% enantiomeric excess, with the majority of
the compounds being in the "S" configuration, has what
proportions? - correct answer-5% - R
95% - S
What is the enantiomeric excess of a solution with 70% (R)
enantiomer and 30% (S) enantiomer? - correct answer-40%
excess of the (R) enantiomer
Any compound possessing a _____ will be achiral. - correct
answer-Plane of symmetry
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Meso compounds are achiral and possess _____ - correct
answer-Reflectional symmetry
In Neumann Projections, when two CH3's are next to each
other - correct answer-Gauche Interaction
An ______ is a stereoisomer that results from the hindered
rotation of a single bond. - correct answer-Atropisomer
An _____ is a compound with two adjacent C=C bonds -
correct answer-Allene
What are the two types of chiral compounds lacking a chiral
center? - correct answer-Atropisomers; allenes
An _____ is seen in a Neumann Projection when the leaving
group and transferred hydrogen are on OPPOSITE sides. -
correct answer-Anti-coplanar configuration
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_____ is seen in a Neumann Projection when the leaving group
and transferred hydrogen are next to one another. - correct
answer-Syn-coplanar configuration
What is the difference between anti-periplanar and anti-
coplanar? - correct answer-Being truly anti-coplanar means the
angle between the leaving group and the transferred proton is
exactly 180 degrees; when this angle deviates, the molecule is
anti-periplanar.
An E2 and SN2 reaction is said to be _____ because the
stereoisomer of the product depends on the configuration of the
starting materials. - correct answer-Stereospecific
In order for an E2 reaction to occur, the leaving group and
transferrable carbon must be _____ - correct answer-Anti-
periplanar
The requirement for an anti-periplanar conformation demands
that an E2 reaction can only occur from the chair conformation
in which the leaving group occupies an _____ position. - correct
answer-Axial
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_____ are characterized by the breaking of the pi bond and the
addition of two groups in its place. - correct answer-Addition
Reactions
At high temperatures, _____ are more stable. - correct answer-
Elimination reactions
_____ tend to favor addition reactions. - correct answer-Dilute
acids
_____ tend to favor elimination reactions. - correct answer-Less
dilute acids
At low temperatures, _____ are more stable. - correct answer-
Addition reactions
Addition of a halogen and H - correct answer-
Hydrohalogenation
UTA ORGANIC CHEMISTRY I (BUGARIN) -
TEST TWO 2026 ACTUAL QUESTIONS
WITH VERIFIED ANSWERS.
R/S configurations cannot predict _____ - correct answer-
Whether a compound is dextrorotatory or levorotatory.
A solution with a 90% enantiomeric excess, with the majority of
the compounds being in the "S" configuration, has what
proportions? - correct answer-5% - R
95% - S
What is the enantiomeric excess of a solution with 70% (R)
enantiomer and 30% (S) enantiomer? - correct answer-40%
excess of the (R) enantiomer
Any compound possessing a _____ will be achiral. - correct
answer-Plane of symmetry
, Page | 2
Meso compounds are achiral and possess _____ - correct
answer-Reflectional symmetry
In Neumann Projections, when two CH3's are next to each
other - correct answer-Gauche Interaction
An ______ is a stereoisomer that results from the hindered
rotation of a single bond. - correct answer-Atropisomer
An _____ is a compound with two adjacent C=C bonds -
correct answer-Allene
What are the two types of chiral compounds lacking a chiral
center? - correct answer-Atropisomers; allenes
An _____ is seen in a Neumann Projection when the leaving
group and transferred hydrogen are on OPPOSITE sides. -
correct answer-Anti-coplanar configuration
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_____ is seen in a Neumann Projection when the leaving group
and transferred hydrogen are next to one another. - correct
answer-Syn-coplanar configuration
What is the difference between anti-periplanar and anti-
coplanar? - correct answer-Being truly anti-coplanar means the
angle between the leaving group and the transferred proton is
exactly 180 degrees; when this angle deviates, the molecule is
anti-periplanar.
An E2 and SN2 reaction is said to be _____ because the
stereoisomer of the product depends on the configuration of the
starting materials. - correct answer-Stereospecific
In order for an E2 reaction to occur, the leaving group and
transferrable carbon must be _____ - correct answer-Anti-
periplanar
The requirement for an anti-periplanar conformation demands
that an E2 reaction can only occur from the chair conformation
in which the leaving group occupies an _____ position. - correct
answer-Axial
, Page | 4
_____ are characterized by the breaking of the pi bond and the
addition of two groups in its place. - correct answer-Addition
Reactions
At high temperatures, _____ are more stable. - correct answer-
Elimination reactions
_____ tend to favor addition reactions. - correct answer-Dilute
acids
_____ tend to favor elimination reactions. - correct answer-Less
dilute acids
At low temperatures, _____ are more stable. - correct answer-
Addition reactions
Addition of a halogen and H - correct answer-
Hydrohalogenation
