DP Chemistry (last assessment 2024)

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Additional higher level (AHL) » Topic 20: Organic chemistry » 20.3 Stereoisomerism

20.3 Stereoisomerism

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Directly related questions

17N.2.hl.TZ0.8a.v: Draw three-dimensional representations of the two enantiomers.
17N.2.hl.TZ0.8a.v: Draw three-dimensional representations of the two enantiomers.
17N.2.hl.TZ0.a.v: Draw three-dimensional representations of the two enantiomers.
18M.1.hl.TZ2.37: Which isomers exist as non-superimposable mirror images? A. cis-trans isomers B. ...
18M.1.hl.TZ2.37: Which isomers exist as non-superimposable mirror images? A. cis-trans isomers B. ...
18M.1.hl.TZ1.36:
Which molecule contains a chiral carbon?

A. CH₃CH₂CHBrCH₂CH₃

B. CH₃CH₂CHBrCH₃

C. CH₂BrCH(CH₃)CH₂Br

D. CH₃CH₂CH₂CH₂CH₂Br
18M.1.hl.TZ1.36:
Which molecule contains a chiral carbon?

A. CH₃CH₂CHBrCH₂CH₃

B. CH₃CH₂CHBrCH₃

C. CH₂BrCH(CH₃)CH₂Br

D. CH₃CH₂CH₂CH₂CH₂Br
18M.2.hl.TZ2.9b.iv:
Suggest, giving a reason, the percentage of each isomer from the S_N1 reaction.
18M.2.hl.TZ2.b.iv:
Suggest, giving a reason, the percentage of each isomer from the S_N1 reaction.
18M.2.hl.TZ2.9b.iv:
Suggest, giving a reason, the percentage of each isomer from the S_N1 reaction.
21N.1.hl.TZ0.35: Which statement is correct about configurational isomers? A. Configurational isomers can only...
21N.1.hl.TZ0.35: Which statement is correct about configurational isomers? A. Configurational isomers can only...
21N.2.hl.TZ0.10b(iv): State, giving a reason, if the product of this reaction exhibits stereoisomerism.
21N.2.hl.TZ0.10b(iv): State, giving a reason, if the product of this reaction exhibits stereoisomerism.
21N.2.hl.TZ0.b(iv): State, giving a reason, if the product of this reaction exhibits stereoisomerism.
18N.2.hl.TZ0.8b.ii: State, giving a reason, whether methyloxirane can form cis-trans isomers.
18N.2.hl.TZ0.8b.ii: State, giving a reason, whether methyloxirane can form cis-trans isomers.
18N.2.hl.TZ0.b.ii: State, giving a reason, whether methyloxirane can form cis-trans isomers.
22M.1.hl.TZ1.37: What are the E/Z designations of these stereoisomers?
22M.1.hl.TZ1.37: What are the E/Z designations of these stereoisomers?
22M.2.hl.TZ2.8d(i):
Draw the full structural formula of (Z)-but-2-ene.
22M.2.hl.TZ2.8d(i):
Draw the full structural formula of (Z)-but-2-ene.
22M.2.hl.TZ2.d(i):
Draw the full structural formula of (Z)-but-2-ene.
19M.2.hl.TZ1.1e:
The organic product is not optically active. Discuss whether or not the organic product is a racemic mixture.
19M.2.hl.TZ1.1e:
The organic product is not optically active. Discuss whether or not the organic product is a racemic mixture.
19M.2.hl.TZ1.e:
The organic product is not optically active. Discuss whether or not the organic product is a racemic mixture.
19M.2.hl.TZ2.6d(i):
Outline why the major product, C₆H₅–CHBr–CH₃, can exist in two forms and state the relationship between these forms.

Two forms:

Relationship:
19M.2.hl.TZ2.6d(i):
Outline why the major product, C₆H₅–CHBr–CH₃, can exist in two forms and state the relationship between these forms.

Two forms:

Relationship:
19M.2.hl.TZ2.d(i):
Outline why the major product, C₆H₅–CHBr–CH₃, can exist in two forms and state the relationship between these forms.

Two forms:

Relationship:
19M.2.hl.TZ2.6d(ii):
The minor product, C₆H₅–CH₂–CH₂Br, can exist in different conformational forms (isomers).

Outline what this means.
19M.2.hl.TZ2.6d(ii):
The minor product, C₆H₅–CH₂–CH₂Br, can exist in different conformational forms (isomers).

Outline what this means.
19M.2.hl.TZ2.d(ii):
The minor product, C₆H₅–CH₂–CH₂Br, can exist in different conformational forms (isomers).

Outline what this means.
19M.3.hl.TZ1.5a:
Label with an asterisk, *, the chiral carbon atom.
19M.3.hl.TZ1.5a:
Label with an asterisk, *, the chiral carbon atom.
19M.3.hl.TZ1.a:
Label with an asterisk, *, the chiral carbon atom.
19N.3.hl.TZ0.26a: State the feature of Taxol that is a major challenge in its synthesis. Use section 37 of the data...
19N.3.hl.TZ0.26a: State the feature of Taxol that is a major challenge in its synthesis. Use section 37 of the data...
19N.3.hl.TZ0.a: State the feature of Taxol that is a major challenge in its synthesis. Use section 37 of the data...
22N.2.hl.TZ0.6c: State an instrument that could be used to determine whether the product was a single enantiomer...
22N.2.hl.TZ0.6c: State an instrument that could be used to determine whether the product was a single enantiomer...
22N.2.hl.TZ0.c: State an instrument that could be used to determine whether the product was a single enantiomer...
17N.1.hl.TZ0.37: What is the number of optical isomers of isoleucine? A. 0 B. 2 C. 4 D. 8
17N.1.hl.TZ0.37: What is the number of optical isomers of isoleucine? A. 0 B. 2 C. 4 D. 8
17N.2.hl.TZ0.8a.iv: Deduce, giving a reason, which of the two compounds can show optical activity.
17N.2.hl.TZ0.8a.iv: Deduce, giving a reason, which of the two compounds can show optical activity.
17N.2.hl.TZ0.a.iv: Deduce, giving a reason, which of the two compounds can show optical activity.
18M.1.hl.TZ1.35: What is name of this compound applying IUPAC rules? A. E 1-bromo-1-chlorobut-1-ene B. ...
18M.1.hl.TZ1.35: What is name of this compound applying IUPAC rules? A. E 1-bromo-1-chlorobut-1-ene B. ...
18M.3.hl.TZ2.8e:
Sketch the wedge and dash (3-D) representations of alanine enantiomers.
18M.3.hl.TZ2.8e:
Sketch the wedge and dash (3-D) representations of alanine enantiomers.
18M.3.hl.TZ2.e:
Sketch the wedge and dash (3-D) representations of alanine enantiomers.
18N.1.hl.TZ0.37:
How many chiral carbon atoms are present in one molecule of (CH₃)₂CHCHClCHBrCH₃?

A. 0

B. 1

C. 2

D. 3
18N.1.hl.TZ0.37:
How many chiral carbon atoms are present in one molecule of (CH₃)₂CHCHClCHBrCH₃?

A. 0

B. 1

C. 2

D. 3
19M.1.hl.TZ1.37: Which compound can exist as cis- and trans-isomers?
19M.1.hl.TZ1.37: Which compound can exist as cis- and trans-isomers?
19M.1.hl.TZ2.36: Which compound exists as two configurational isomers? A. CBr2=CH2 B. CH2=CHBr C....
19M.1.hl.TZ2.36: Which compound exists as two configurational isomers? A. CBr2=CH2 B. CH2=CHBr C....
19N.1.hl.TZ0.38:
Which can show optical activity?

A. CHBrCHCl

B. CH₃CH₂CHBrCH₂CH₃

C. (CH₃)₂CBrCl

D. CH₃CH₂CH(CH₃)Br
19N.1.hl.TZ0.38:
Which can show optical activity?

A. CHBrCHCl

B. CH₃CH₂CHBrCH₂CH₃

C. (CH₃)₂CBrCl

D. CH₃CH₂CH(CH₃)Br
20N.1.hl.TZ0.37:
Which molecule has an enantiomer?

A.   ${CH}_{3} {CH}_{2} CH (OH) {CH}_{2} {CH}_{3}$

B.   ${CH}_{2} (OH) {CH}_{2} {CH}_{2} CH = {CH}_{2}$

C.   ${CH}_{3} {CH}_{2} {CH}_{2} CH = CHBr$

D.   ${CH}_{3} {CHBrCH}_{2} {CH}_{2} {CH}_{3}$
20N.1.hl.TZ0.37:
Which molecule has an enantiomer?

A.   ${CH}_{3} {CH}_{2} CH (OH) {CH}_{2} {CH}_{3}$

B.   ${CH}_{2} (OH) {CH}_{2} {CH}_{2} CH = {CH}_{2}$

C.   ${CH}_{3} {CH}_{2} {CH}_{2} CH = CHBr$

D.   ${CH}_{3} {CHBrCH}_{2} {CH}_{2} {CH}_{3}$
21M.1.hl.TZ1.37: How many chiral centres are there in the following molecule? A. 2 B. 3 C. 4 D. 6
21M.1.hl.TZ1.37: How many chiral centres are there in the following molecule? A. 2 B. 3 C. 4 D. 6
21M.1.hl.TZ2.35: Which compound shows cis-trans isomerism? A. CH3CH=CCl2 B. CCl2=CH2 C. D.
21M.1.hl.TZ2.35: Which compound shows cis-trans isomerism? A. CH3CH=CCl2 B. CCl2=CH2 C. D.
21M.1.hl.TZ2.36:
Which compound rotates the plane of plane-polarized light?

A. CH₃C(CH₃)ClCH₃

B. CH₃CH₂CHClCH₃

C. CH₃C(Cl)₂CH₃

D. CH₃CClBrCH₃
21M.1.hl.TZ2.36:
Which compound rotates the plane of plane-polarized light?

A. CH₃C(CH₃)ClCH₃

B. CH₃CH₂CHClCH₃

C. CH₃C(Cl)₂CH₃

D. CH₃CClBrCH₃
21M.2.hl.TZ2.4h(i): Draw the stereoisomers of butan-2-ol using wedge-dash type representations.
21M.2.hl.TZ2.4h(i): Draw the stereoisomers of butan-2-ol using wedge-dash type representations.
21M.2.hl.TZ2.h(i): Draw the stereoisomers of butan-2-ol using wedge-dash type representations.
21M.2.hl.TZ2.4h(ii): Outline how two enantiomers can be distinguished using a polarimeter.
21M.2.hl.TZ2.4h(ii): Outline how two enantiomers can be distinguished using a polarimeter.
21M.2.hl.TZ2.h(ii): Outline how two enantiomers can be distinguished using a polarimeter.
21N.2.hl.TZ0.10b(i): State, giving a reason, if but-1-ene exhibits cis-trans isomerism.
21N.2.hl.TZ0.10b(i): State, giving a reason, if but-1-ene exhibits cis-trans isomerism.
21N.2.hl.TZ0.b(i): State, giving a reason, if but-1-ene exhibits cis-trans isomerism.
22M.2.hl.TZ1.5a(v):
Identify the isomer of Compound B that exists as optical isomers (enantiomers).
22M.2.hl.TZ1.5a(v):
Identify the isomer of Compound B that exists as optical isomers (enantiomers).
22M.2.hl.TZ1.a(v):
Identify the isomer of Compound B that exists as optical isomers (enantiomers).
22N.1.hl.TZ0.33: Which compound has a chiral carbon? A. Bromoethane B. 2-bromopropane C. 2-bromobutane D. ...
22N.1.hl.TZ0.33: Which compound has a chiral carbon? A. Bromoethane B. 2-bromopropane C. 2-bromobutane D. ...

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