E4 Synthesis of Aspirin and Oil of Wintergreen 10-2-15 Introduction Many everyday products are primarily comprised of organic molecules. Aspirin and the oil of wintergreen are esters, which is an organic compound that contains molecular connectivity. The esters usually have a pleasant and inviting aroma to them. Esters are used in cosmetics, perfumes, food, and pharmaceutical industry. Aspirin is the most used medication used worldwide. Aspirin is the common name for the compound acetylsalicylic
Biology Report 6 Name : Tan Mei Jing Student No. : 2017141025 Subject : Paper Chromatography Group : 2 Date of Experiment : 31/10/2017 Date of Submission : 2/11/2017 Objectives To understand the principle and mechanism of paper chromatography. To investigate (and separate) the different pigments present in lettuce leaves by using the paper chromatography technique. Hypothesis Lettuce contains mostly chlorophylls (both α and β) for the green color. Results
benzoate by electropilic aromatic substitution. -To calculate the percentage yield and get the melting point of methyl-3-nitrobenzoate. Introduction: Benzene contains compounds have special properties that make them to react differently than other molecules. The conjugated compound of dienes in aromatic rings give an extra stability to undergo addition reactions
Introduction Cells like to have some control over what gets in and what goes back out. This is called selective permeability (Tamarkin 2011). Two ways small particles can get past the cell membrane are through diffusion and osmosis (Tamarkin 2011).The terms diffusion and osmosis refer to the way small particles move. They are both examples of passive transport (Tamarkin 2011). Diffused particles move in a concentration gradient (Tamarkin 2011), which means they both move from areas of high concentration
products ratio of n-butyraldehyde and isobutyraldehyde of 8-16 can be achieved. The catalysts of nickel or copper in gaseous phase or nickel in liquid phase are used for hydrogenation. Second process is aldol condensation, in this reaction; two molecules of acetic aldehyde condense by dehydration. The product crotonaldehyde is then transformed into n-butanol by hydrogenation at 180°C and 0.2MPa. The reaction is as follows: CH3CH=CHCHO+2H2