*The chemical equation corresponding to the synthesis reaction is: C7H6O3 + (CH3CO)2O → C9H804 + CH3COOH. Please use this balanced equation and the weight of salicylic acid used to calculate the theoretical yield.
How is aspirin synthesis set?
- Place 2.0 g (0.015 mole) of salicylic acid in a 125-mL Erlenmeyer flask.
- Add 5 mL (0.05 mole) of acetic anhydride, followed by 5 drops of conc. …
- Heat the flask gently on the steam bath for at least 10 minutes.
- Allow the flask to cool to room temperature.
What element is aspirin?
The chemical name of aspirin is acetylsalicylic acid. By looking at its chemical structure, you’ll see that it’s composed of three different types of atoms: carbon, hydrogen, and oxygen.
What is the electrophile in aspirin synthesis?
An addition elimination reaction occurs at the carbonyl carbon where a nucleophile attacks the highly electrophilic carbonyl carbon. … Once Salicylic Acid (limiting reagent) is synthesized, it too can undergo a carbonyl addition-elimination with acetic anhydride to produce aspirin.Is the synthesis of aspirin exothermic or endothermic?
In a reaction vessel salicylic acid, acetic anhydride and sulfuric acid are mixed. The exothermic reaction will cause the temperature to increase to 70-80°C.
What is produced as a byproduct of the aspirin synthesis?
The byproduct of the synthesis of aspirin is acetic acid.
When was aspirin invented?
In 1897, Felix Hoffman, a German chemist working for the Bayer company, was able to modify salicylic acid to create acetylsalicylic acid, which was named aspirin (Fig.
What is an electrophile vs Nucleophile?
Electrophiles are those reactants that are either positively charged or neutral with no lone pair of electrons. … A nucleophile is that chemical species that has negative charge or that has lone pairs of electrons. Lone pair of electrons is those electrons that do not get used in the bond.What is the mechanism of action of aspirin?
Acetylsalicylic acid disrupts the production of prostaglandins throughout the body by targeting cyclooxygenase-1 (COX-1) and cyclooxygenase-2 (COX-2) 9,10,11. Prostaglandins are potent, irritating substances that have been shown to cause headaches and pain upon injection into humans.
What is the chemical structure of aspirin?AspirinChemical formulaCH3COOC6H4COOH or C9H8O4IUPAC Name2-acetoxybenzoic acidOther namesAcetylsalicylic acid, aspirin, acetylsalicylate.Molar mass180.16 g/mol
Article first time published onIs aspirin molecular or ionic?
Covalent Compound— The aspirin molecule shown to the left is composed of three different types of atoms: carbon (green), oxygen (red) and hydrogen (white) covalently bound. To view the 3-D structure of aspirin click here.
How is aspirin made in industry?
The manufacturing of aspirin is done via the use of a reactor, acetic acid, salicylic acid and the use of an acetic anhydride to complete the reaction.
Is aspirin synthesis a reversible reaction?
The reaction involves the conversion of a phenol to an ester. This reaction is reversible, which is why aspirin commonly smells of vinegar, as the ASA hydrolyzes in air back to SA and acetic acid.
Is the formation of aspirin reversible?
Low-dose aspirin use irreversibly blocks the formation of thromboxane A2 in platelets, producing an inhibitory effect on platelet aggregation during the lifetime of the affected platelet (8–9 days).
Is the Wintergreen reaction endothermic?
Be careful the reaction is exothermic.
Where is aspirin manufactured?
Most of the North American supply of aspirin, for example, comes from China, which produces about 120 billion tablets per year. Other widely used drugs, such as omeprazole and simvastatin often come from Puerto Rico and India.
Where is aspirin derived?
Aspirin, the generic term for acetylsalicyclic acid, has been widely used for over 100 years. It is derived from the compound called salicin which comes from the bark of the willow plant.
What was aspirin originally used for?
Originally used as an antipyretic and anti-inflammatory drug, aspirin then became, for its antiplatelet properties, a milestone in preventing cardiovascular and cerebrovascular diseases.
What byproduct is synthesized along with aspirin in the reaction performed in this lab?
Aspirin is synthesized in the lab by performing the acetylation of salicylic acid. For acetylation, acetic anhydride is used.
Why is the synthesized aspirin in the laboratory Cannot be used for commercial and pharmaceutical purposes?
In this laboratory activity you will synthesize aspirin, a derivative of salicylic acid. Salicylic acid and its derivatives are antipyretics. … Salicylic acid itself is not used for these purposes because it has an irritating effect on the stomach. The most common salicylate used in medicine today is aspirin.
Why is salicylic acid converted to aspirin?
In folk medicines willow bark trees were used as headache remedies and as other tonics too. But these create irritations in the stomach therefore, nowadays salicylic acid is administered in the form of aspirin which is less irritating to the stomach.
What is the pharmacokinetics of aspirin?
Pharmacokinetics is what the body does to the drug, and pharmacodynamics is what the drug does to the body. Aspirin is absorbed in the GI tract and then distributed to all tissues of the body. It is broken down into salicylic acid, and the liver changes it into metabolites. It is excreted through the kidneys.
How aspirin is metabolized?
Therefore, aspirin has a very short half-life. Salicylate, in turn, is mainly metabolized by the liver. This metabolism occurs primarily by hepatic conjugation with glycin or glucuronic acid, each involving different metabolic pathways. The predominant pathway is the conjugation with glycin, which is saturable.
What is the prototype of aspirin?
Mechanism of Action The mechanism of analgesic action of acetaminophen is unclear. The drug is only a weak COX-1 and COX-2 inhibitor in peripheral tissues, which accounts for its lack of anti-inflammatory effect. Evidence suggests that acetaminophen may inhibit a third enzyme, COX-3, in the CNS.
What are electrophiles and neutrophils?
Electrophile and nucleophile are the chemical species that donate or accept electrons to form a new chemical bond. A nucleophile is a chemical species which, in relation to a response, gives an electron pair to form a chemical bond.
What are electrophiles and nucleophiles give an example for each?
Electrophiles are electron deficient species and can accept an electron pair from electron rich species. Examples include carbocations and carbonyl compounds. A nucleophile is electron rich species and donates electron pairs to electron deficient species. Examples include carbonions, water , ammonia, cyanide ion etc.
How do you tell if a reaction is nucleophilic or electrophilic?
A nucleophilic addition reaction has a nucleophile being added up. This nucleophile provides or donates electrons on the place of its addition. While an electrophilic addition reaction has an electrophile, which is an electron deficient species that accepts electrons.
What is the condensed structural formula for aspirin?
Chemical Formula of Aspirin (Acetylsalicylic acid)C9H8O4Extended Molecular Formula of AspirinCH3COOC6H4COOH
Is aspirin a polar?
Aspirin is a polar molecule with dipole-dipole attraction bonds and an -OH (hydroxyl) segment as part of a carboxylic acid group.
What intermolecular forces are present in aspirin?
- Aspirin uses hydrogen bonding, which occurs when the hydrogen of one molecule creates a bond with the oxygen of another aspirin molecule.
- There is also dipole-dipole forces that exist between polar molecules.
- London Dispersion everywhere.
What is the pH of aspirin?
Aspirins absorption is pH sensitive at the level of the small intestine. Absorption is higher through the small intestine than the stomach for the same pH range. At pH 3.5 or 6.5, aspirin’s intestinal absorption is greater than the gastric absorption of the compound. The stomach does not absorb aspirin at pH 6.5.
