CHM301 - Essential oil Assignment group 9 PDF

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GROUP ASSIGNMENT CHM 301: ORGANIC CHEMISTRY IITITLE: ORGANICCOMPOUNDGROUP: AS1204AStudent’sName Student’s IDMOHAMAD FAREEZ BIN AZIZ 2019293142MUHAMAD SYAHMI BIN MOHD ZAKUAN 2019212242MUHAMMAD FAKHRUL RADZI BIN FIKRI 2019431896DATE OF SUBMISSION: 9 JUNE 2021LECTURER’S NAME: NOR HABIBAHMOHD ROSLIFor e...

Description

GROUP ASSIGNMENT CHM 301: ORGANIC CHEMISTRY II TITLE: ORGANIC COMPOUND GROUP: AS1204A Student’s Name

Student’s ID

MOHAMAD FAREEZ BIN AZIZ

2019293142

MUHAMAD SYAHMI BIN MOHD ZAKUAN

2019212242

MUHAMMAD FAKHRUL RADZI BIN FIKRI

2019431896

DATE OF SUBMISSION: 9 JUNE 2021 LECTURER’S NAME: NOR HABIBAH MOHD ROSLI

For examiner’s use ONLY:

0

Sections

No.

a.

b.

Marks

Introduction

Understanding the topic given

c.

Ability to apply ideas or knowledge

d.

Organization and references

e.

Plagiarism

TOTAL

Introduction Menthol is a chemical naturally obtained from peppermint or other mint oils. The physical state of menthol is a waxy, crystalline substance, clear or white in colour, solid at room temperature and melts at slightly above (43 °C). There are many uses of menthol like as local anesthetic,used to relieve minor throat irritation and as chiral auxiliary synthesis. It is also intensively used in pharmaceuticals, cosmetics, toothpastes, chewing gum and toiletries. Menthol is an alcohol and it is a secondary type of alcohol. Menthol is a saturated compound and its molecular formula is C 10H20O. Natural menthol exists as one pure stereoisomer. The possible stereoisomers are Menthol, Isomenthol, Neomenthol and Neoisomenthol. a) Draw a structural formula of the selected organic compound consisting more than two functional groups in its structure including hydroxyl group.

1

b) Classify the type of alcohol of the selected compound and justify your answer. ·

Menthol is a secondary alcohol.

·

The –OH group is attached to a carbon atom that contains two hydrogen atom

· Menthol consists of a primary alcohol functional group, with general structure ROH. ·

Secondary alcohol shows results in hydroxyl like menthol and hydrogen.

· Menthol contains alcohol which has the hydroxyl group connected to a secondary carbon atom. c) Illustrate a balance chemical equation to synthesize aldehyde/ketone from the selected organic compound

2

d) Write a stepwise mechanisms for reaction in (c) :

3

4

e)Suggest a chemical test to confirm the formation of aldehyde/ketone for reaction in (c): A chemical test that can be conducted is Brady’s test. The reagent that can be used is 2,4dinitrophenylhydrazine(Brady's reagent) to detect the menthone. Menthone added into the 2,4DNPH

at

room

temperature.

It

will

give

a

yellow-orange

precipitate

of

2,4-

dinitrophenylhydrazine.

f) Predict the product form if aldehyde/ketone produced in reaction (c) undergo further oxidation under reflux condition.

5

REFERENCES 1. Nandkishor Karade. (2018, September 8). Lecture 4 Menthol [Video]. YouTube. https://www.youtube.com/watch?v=FoVJQKG23cc

2. National Center for Biotechnology Information (2021). PubChem Compound Summary

for

CID

1254,

Menthol.

Retrieved

June

9,

2021

from

https://pubchem.ncbi.nlm.nih.gov/compound/Menthol. 3. What Is Menthol? (2018, June 20). Lung.Org. https://www.lung.org/quitsmoking/smoking-facts/health-effects/what-is-menthol 4. Wade,

L.

G.

(2018,

December

7).

Menthol.

Encyclopedia

Britannica.

https://www.britannica.com/science/menthol 5. Strategies in (-)-Menthol Synthesis. (2021, March 17). Retrieved June 9, 2021, from https://chem.libretexts.org/@go/page/21840

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