CHE1502
EXAM PACK
Recent exam questions and answers
Summarised study notes
Exam tips and guidelines
DISCLAIMER & TERMS OF USE
1. Educational Aid: These study notes are designed to serve as educational aids and should not be considered as a
substitute for individual research, critical thinking, or professional guidance. Students are encouraged to
conduct their own extensive research and consult with their instructors or academic advisors for specific
assignment requirements.
2. Personal Responsibility: While every effort has been made to ensure the accuracy and reliability of the
information provided in these study notes, the seller cannot guarantee the completeness or correctness of all
the content. It is the responsibility of the buyer to verify the accuracy of the information and use their own
judgment when applying it to their assignments.
3. Academic Integrity: It is crucial for students to uphold academic integrity and adhere to their institution's
policies and guidelines regarding plagiarism, citation, and referencing. These study notes should be used as a
tool for learning and inspiration, but any direct reproduction of the content without proper acknowledgment and
citation may constitute academic misconduct.
4. Limited Liability: The seller of these study notes shall not be held liable for any direct or indirect damages,
losses, or consequences arising from the use of the notes. This includes, but is not limited to, poor grades,
academic penalties, or any other negative outcomes resulting from the application or misuse of the information
provided.
,MAY 2017 CHE1502
SECTION B
Question 1 [20]
(a) Draw the resonance forms to show the delocalization of charges in the
following structure. Show the movement of electrons with curved arrows.
(4)
1 mark for each arrow
1 mark each for correct 2nd and 3rd structure
(b) Draw the Newman projection formulas of the MOST STABLE and LEAST
STABLE conformations of the following compound below. Label the
conformations accordingly.
, (6)
2 marks for each correct Newman projection and 1 mark for correct Least stable
and 1 mark for correct most stable label.
If Newman projections are wrong but most and/or least stable identification is
correct give 1 mark each.
(c) Draw the Lewis structure of any secondary alcohol and give the IUPAC of the
chosen compound.
(4)
Any secondary alcohol √
Lewis structure : all bonds and atoms must be shown and the electrons around
O √√
Correct IUPAC name √
(d) Formulate a detailed mechanism of the following nucleophilic substitution
reaction:
, Name the product according to the IUPAC nomenclature.
(6)
Firstly, carbocation formation:
√ √
Secondly, we redraw the carbocation (in 3-D format) and show the nucleophile
attacking from the bottom or top:
√ √ √ one of each step and the product
IUPAC name: 3-Methyl-3-methoxypentane √
Question 2 [20]
(a) Consider the following reaction:
EXAM PACK
Recent exam questions and answers
Summarised study notes
Exam tips and guidelines
DISCLAIMER & TERMS OF USE
1. Educational Aid: These study notes are designed to serve as educational aids and should not be considered as a
substitute for individual research, critical thinking, or professional guidance. Students are encouraged to
conduct their own extensive research and consult with their instructors or academic advisors for specific
assignment requirements.
2. Personal Responsibility: While every effort has been made to ensure the accuracy and reliability of the
information provided in these study notes, the seller cannot guarantee the completeness or correctness of all
the content. It is the responsibility of the buyer to verify the accuracy of the information and use their own
judgment when applying it to their assignments.
3. Academic Integrity: It is crucial for students to uphold academic integrity and adhere to their institution's
policies and guidelines regarding plagiarism, citation, and referencing. These study notes should be used as a
tool for learning and inspiration, but any direct reproduction of the content without proper acknowledgment and
citation may constitute academic misconduct.
4. Limited Liability: The seller of these study notes shall not be held liable for any direct or indirect damages,
losses, or consequences arising from the use of the notes. This includes, but is not limited to, poor grades,
academic penalties, or any other negative outcomes resulting from the application or misuse of the information
provided.
,MAY 2017 CHE1502
SECTION B
Question 1 [20]
(a) Draw the resonance forms to show the delocalization of charges in the
following structure. Show the movement of electrons with curved arrows.
(4)
1 mark for each arrow
1 mark each for correct 2nd and 3rd structure
(b) Draw the Newman projection formulas of the MOST STABLE and LEAST
STABLE conformations of the following compound below. Label the
conformations accordingly.
, (6)
2 marks for each correct Newman projection and 1 mark for correct Least stable
and 1 mark for correct most stable label.
If Newman projections are wrong but most and/or least stable identification is
correct give 1 mark each.
(c) Draw the Lewis structure of any secondary alcohol and give the IUPAC of the
chosen compound.
(4)
Any secondary alcohol √
Lewis structure : all bonds and atoms must be shown and the electrons around
O √√
Correct IUPAC name √
(d) Formulate a detailed mechanism of the following nucleophilic substitution
reaction:
, Name the product according to the IUPAC nomenclature.
(6)
Firstly, carbocation formation:
√ √
Secondly, we redraw the carbocation (in 3-D format) and show the nucleophile
attacking from the bottom or top:
√ √ √ one of each step and the product
IUPAC name: 3-Methyl-3-methoxypentane √
Question 2 [20]
(a) Consider the following reaction:
