Title of Access to HE Diploma: Access to Pharmacy and Biomedical Sciences Unit title(s): Organic Chemistry - Reactions and Mechanisms Unit code(s): CBB042 Level 3
Scenario: You are a senior technician who has been asked to produce a PowerPoint on the synthesis of simple organic molecules, including mechanisms, creating questions and answers for trainee chemistry technicians. In your PowerPoint.
Complete the questions on the attached handout AC (1.1, 2.1, 2.2, 3.1, 3.2, 4.1)
Level 3 |
Unit title: Organic Chemistry - Reactions and Mechanisms |
This assignment addresses the following Assessment Criteria from the unit (or a copy of the unit may be attached, if all AC are covered): |
|
AC no |
Level Three |
1.1 |
Explain the reactions of benzene, including by reference to bonding and reaction mechanism(s). |
2.1 |
Explain optical isomerism in organic molecules |
2.2 |
Predict and explain the physical and chemical consequences of optical isomerism |
3.1 |
Explain some of the different types of reaction mechanism in organic chemistry. |
3.2 |
Construct reaction mechanisms. |
4.1 |
Propose and justify viable pathways for the synthesis of organic molecules. |
Task 1 (AC 1.1)
Task 2
Benzene reacts with chlorine in the presence of a halogen carrier, such as AlCl3. (AC 1.1)
Task 3
2-aminopropanoic acid (alanine) (AC 2.1)
This is typical of naturally-occurring amino acids.
Only one of these isomers occurs naturally: the (+) form. You cannot tell just by looking at the structures which this is. Select and explain which one is it, left or right and why?
Task 4.
Explain and construct different types of reaction mechanism in organic chemistry
(AC 3.1, 3.2)
Propanal, CH3CH2CHO, can be used in the synthesis of organic compounds.
CH3CH2CHO reacts with NaBH4 in a nucleophilic addition reaction. The nucleophile can be represented as a hydride ion, H–. A mechanism for the reaction is shown below.
Task 5
In the laboratory, ethanol can be oxidised with acidified potassium dichromate(VI). (AC 4.1)
The boiling points of ethanol, ethanal and ethanoic acid are given in the table below
CH3CH2OH |
CH3CHO |
CH3COOH |
|
boiling point / °C |
8 |
21 |
118 |
Use this table of boiling points to explain:
Task 6
Explain with diagrams the selectivity and stereospecificity in organic reactions. (AC 4.1)
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