Ester

Introduction The ester that was developed throughout the entire lab is known as methyl cinnamate. Methyl cinnamate is an ester that is created when cinnamic acid is mixed with methanol and sulfuric acid (see Scheme 1). Around the world, methyl cinnamate is found in a variety of plants and fruits such as strawberry or cinnamon. The plant most used to collect higher concentrations of methyl cinnamate is the Eucalyptus olida with a concentration of 98%. Due to the fact that the ester comes from a cinnamic

reactants to react and be converted into the products, which in this case is the ester. However the reactants are very volatile which means that it is easily evaporates and won’t produce the products. Reflux is then needed and used to cool any of the reactant and product vapour evaporating to be heated by reflux once again. Separation/Purification There are a few different steps into separating and purifying the ester from the mixture. At the end of reflux, both the reactants and products are present

Intro Kinetic resolution of a various esters was conducted, where the esters differed by a single substituent. The substituents para to the aromatic ring were a hydrogen, methyl group, fluorine, bromine, and chlorine atoms. The varying para-substituents influence on efficiency of separating a racemic mixture into an enantioenriched reactant and product was assessed. The esters were formed from a given set of ketones as the starting material and reduced into a racemic alcohol followed by acetylation;

Objective The purpose of this experiment is to be able to synthesize an ester from an unknown alcohol using acid catalyzed esterification and to isolate and purify the produce using distillation. Esters are prepared through reactions of a carboxylic acid with an alcohol and the presence of acid. Esters are used in every day life such as the food industry as artificial flavors and the perfume industry as fragrances. Procedure First, add 15 mL of acetic acid, 1.5 mL of concentrated sulfuric acid

Submitted: September 13, 2012 ------------------------------------------------- Abstract Carboxylic acid derivatives namely, acyl halides, acid anhydrides, esters and amides were classified through different reactivity tests. The samples used were acetyl chloride for acyl halide group, acetic anhydride for acid anhydride group, ethyl acetate for ester group,

Objective In this combinatorial experiment, an acid and alcohol were used as reactants in order to produce esters. In order to determine the acid and alcohol used in the reaction, gas chromatography and the smell of the esters formed were used to determine the acid and alcohol. Raw Data Experiment 1 (CA1 with 2 alcohols) and Experiment 2 (CA2 with 2 Alcohols) were performed in this lab. Table 1: Physical Observations of Products Formed in Each Experiment Experiment Number Product Forms Physical Observations

Describe your observations for the following stages of the experiment: Reflux: Before: Inside the pear shape flask 2 distinct layers were observed sulphuric acid made bottom layer which was light orange and the top layer contained a mixture of and was light yellow. The layers were formed as (density/solubility???) The initial temperature was measured to be During: As the mixture was heated, it began to boil steadily. Also two separate layers were gradually formed and these layers were distinguishable

Lamiophlomis rotata (Benth.) Kudo, have showed significant antinociceptive and anti-inflammatory activities in several animal models[10-11].At the same time,six iridoid glycosides: sesamoside,shanzhiside methyl ester, 7,8-dehydropenstemoside, penstemoside, 8-O-acetylshanzhiside methyl ester, phlomiol and three phenylethanoid glycosides: acteoside, alyssonoside, and isoacteosidewere isolated and identified from P. Younghusbandii. Among of these compounds, 7, 8-dehydropenstemoside, and three phenylethanoid

noticible property of ester products are the oders they produce, which is usually described as fruity. For example, propyl methanoate is described as smelling like apples. Butyl heptanoate has a distinct sent of coconut. Also pentyl ethanoate has a banana scent when created. Lastly propyl butanoate is described as smelling like pears. During this lab the scent of the ester product was evident. The combination of methanoic acid and 2 methylpropyl alcohol created the ester product of 2 methylpropyl

2:20pm 81807 Abstract: An ester was synthesized during an organic reaction and identified by IR spectroscopy and boiling point. Acetic acid was added to 4-methyl-2-pentanol, which was catalyzed by sulfuric acid. This produced the desired ester and water. After the ester was isolated a percent yield of 55.1% was calculated from the 0.872 g of ester recovered. This quantitative error was most likely due to product getting stuck in the apparatus. The boiling point of the ester was 143° C, only one degree