Multiply the weight by the number of th … e element, which is shown by the small number to the right and below the symbol on the molecular formula. Nitric acid 63 -42 120. The sum of the atomic weights of all atoms making up a molecule. The theoretical yield of the nitration of methyl benzoate is dependent upon the quantity of the starting materials. These were then placed into an ice bath. Allow product to air dry for a week. Capillary column studies of C1-C12 n-alkyl esters of benzoic and monochlorobenzoic acids, J.
Procedure Preparation of methyl 3-nitrobenzoate a Weigh 2. At the same time carbon can only make 4 total bonds. Therefore the reaction is regioselective for nitration at the 3-position. Capillary column studies of C1-C12 n-alkyl esters of benzoic and monochlorobenzoic acids, J. This compound can be useful as it is a precursor to , which is used to prepare some dyes. More information on how molecular weights are calculated can be found at the link below.
Esmaeel Naeemi Date: February 21st, 2012 Abstract In this experiment, methyl-m-nitrobenzoate, followed the electrophilic addition of aromatic ring, would be formed from the starting material methyl benzoate and nitric acid, under the catalysis of concentrated sulfuric acid. Next isolate the product by vacuum filtration and weigh the crude product. The reaction is regioselective and produces predominantly methyl 3-nitrobenzoate. The arenium ion is then depronated to reform the aromatic ring and yield the final product with the newly attached nitro group. Comparative study of different extraction techniques for the analysis of virgin olive oil aroma, Food Chem. In the process the methyl benzoate was nitrated to form a methyl m-nitro benzoate. Volatile components from Antidesma laciniatum Muell.
My reaction produced two products. Following recrystallization, melting point and infrared were used to identify and characterize the product of the reaction. The resulting value will be the mole weight or the mass in grams of 22. This highly exothermic reaction is kept under control by cooling then the mixture is poured into ice. It also finds use as a and as a used to attract insects such as.
This causes a slighly repulsion, disfavouring the formation of o and p isomers. Solid methyl 3-nitrobenzoate will form. The major product is the meta product due to carboxyl and nitro groups both being powerful electron withdrawing groups. Support your conclusion with resonance drawings. If the attack takes place in meta, three ressonance structures can be drawn.
Wash the crude product with a little ice-cold water. Nitration of Methyl Benzoate to form Methyl-m-nitrobenzoate via Aromatic Substitution Linh Ngoc Thuy Nguyen Seattle Central Community College Professor: Dr. The following week weigh the clean vial and cap and transfer the product to vial and weigh it. Capillary column studies of C1-C12 n-alkyl esters of benzoic and monochlorobenzoic acids, J. Is the ester group of your starting material electron donating or withdrawing? We take the atomic mass of each atom in the molecule and add them together like so:. No Symbol Name Atomic Wt 1 H Hydrogen 1. The mixture was also washed with 2.
Cool this mixture by partially immersing the flask in an ice-water bath. Works, George; Rudin, Leonid I; Hicks, John; et al. The product was successfully made since nitro group can be observed at peak 1531. Then find the weight for those elements under or above on some tables the element symbol the letter s. Differences in the odor profiles of four high-quality spanish aged red wines, J. The melting point of our product is 75˚C - 78˚C and 76˚C - 78˚C. Theoretical mass of methyl m-nitrobenzene: 0.
Introduction Nitration is an electrophilic aromatic substitution reaction, where a nitro group is being added into the benzene ring, in return to the losing of a hydrogen. Chung-Shan-Yueh-Pa Fruit from Taiwan, J. Cool the nitric acid by partially immersing it in an ice-water bath before slowly adding, with swirling, 1. The use of this expression is historical, however, and will be maintained. The solid product was isolated by. The product was then isolated and recrystallized using methanol.