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Phthalimide, the organic aromatic compound with a chemical formula C6H4(CO)2NH, has a heteroatom Nitrogen present in it. It has an acidic pH and a resonance-stabilized covalent bond. The structure's resilience is boosted via resonance. A strong base may readily remove the H atom linked to the nucleophile. The resultant ion may then be used to produce N-bromophthalimide by reacting with bromine. To synthesise aliphaticamines, the Gabriel Phthalimide Synthesis is an essential step in this procedure. Phthalimide, phthalimide synthesis, phthalimide application, and phthalic hydroxyl reactions are all covered in this article.
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Key Terms: Phthalimide, Ammonia, atom, Bond, Chemical, Synthesise, Compound, carbonyl, alkaline, acid, toxic, burn, Amine.
What is Phthalimide?
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Phthalimide is prepared from Phthalic anhydride. Phthalic anhydride's imide analog, phthalic anhydride imide, is this product. Sublimable white solid with a little amount of water solubility. Even more so when the base is added. As a covert supply of ammonia, it's employed as a predecessor in other organic materials. In terms of nitrogen, it's a member of the family. Phthalic anhydride is used in its production.
Phthalimide
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| Class 12 Chemistry Related Concepts | ||
|---|---|---|
| Etard reaction | Williamson Ether Synthesis | Electrophilic Aromatic Substitution |
| Ester Hydrolysis | Reimer Tiemann Reaction | Esterification |
Phthalimide Composition
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Phthalimide has the chemical formula C6H4(CO2)NH. Benzene rings, two carbonyl compounds, a Nucleophile and a Hydrogen atom are all present in this compound. [A heteroatom N is found in another five-membered circle. Resonance structures are responsible for the compound's increased stability. Phthalimide's composition may be shown in the table below:
| COMPOSITION | DETAILS |
|---|---|
| Structure | C 58.53%, H 4.91%, N 17.06%, O 19.49% |
| Chemical Safety | Corrosive, Irritant |
| Molecular Formula | C8H8NO2 |
| Molecular Weight | 147.13 |
Preparation of Phthalimide
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The binary chemical ammonia and anhydride may be heated together to produce pthalimide. Phthalimide may also be prepared by combining the chemical with carbonate and heating it up. K Phthalimide is formed by reacting it with ethanolic caustic potash, which makes it weakly acidic.
In the chemical industry, the molecule of acid might serve as a crucial intermediary. And it's produced in the market by the oxidation of hydrocarbons. In this case, the hydrocarbons are oxidised using fuming sulfuric acid and mercury catalysts to produce the final product. Hydrocarbons may also be oxidised in the vapour portion of the combustion process. Despite the fact that anhydride may be readily synthesised from acid, equilibrium radical acids do not include any such anhydrides.
Properties of Phthalimide
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Isotope half-life is the length of time it requires for one-half of the atoms to disintegrate for an isotope that is radioactive An isotope's half-life is dictated by its diffusion coefficient and the pattern's concentration. It is possible to use the half-life of a radiological source to determine the age of a material.
Physical Properties
- Solid and white in colour, it's both.
- The molecule has a molar mass of 147.33 g/mole.
- In terms of melting and boiling points, phthalimide is 238°C, and it is 336°C.
- The electrical and thermal conductivity of gold is excellent.
- Gold is a heavy metal due to its density.
- A malleable metal like gold may be pounded into thin sheets, making it ideal for making jewellery.
- Gold is a rare and highly precious material.
Chemical Properties
- It has a pKa of 8.3 and is acid in character.
- Resonance stability is ensured.
- Heteroatoms are included in this compound, which is an imide variant.
- Salts are formed when it interacts with a base.
- The existence of two electrophilic carboxyl is what causes the low ph.
Phthalimide Reactions
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The interaction of phthalic anhydride or the acidic with alcohol produces phthalic acid derivatives, which are employed in diffusion pumps and to replace mercury in manometer tubes. Diethyl and dihexyl esters are commonly employed in this application. Insect repellents such as dimethyl phthalate are effective. The chemical phthalic anhydride is widely utilised in the production of alkyd resins. Polyesters comprising acids with two hydroxyl groups and polyhydroxy alcohols make up these resins.
The acidic imidazole hydrogen atom between the two-hydroxyl group causes phthalimide to generate metallic salts. The potassium salt of phthalimide is used in Gabriel's production of amines and amino acids, as you may recognize. As previously stated, the Hofmann breakdown of phthalimide offers a useful means of obtaining anthranilic acid. Acidified monoperphthalic acid is formed when phthalic anhydride is handled with alkaline peroxide in the cool.
Uses of Phthalimide
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- It is commonly utilised in the pharmaceutical business to synthesise diverse nitrogen-containing organic compounds. It serves as a hidden ammonia supply. As a result, it is preferable to free ammonia.
- It is used to create anthranilic acid, which would be widely utilised in the dye industry.
- In the chemical processing of peptides, it is the molecular precursor.
- Its anti-inflammatory, analgesia, and anticonvulsant characteristics make it useful in drug development.
- As tumour necrotic regulators, a multitude of anti-inflammatory phthalimide compounds has been developed.
Things to Remember
- Anhydrous ammonia may be used to make 95% to 99% of phthalimide by burning the anhydrous anhydride with ammonia.
- A predecessor of anthranilic acid, which is used to make azo colours and aspartame, is phthalimide.
- The mineral kladnoite is a spontaneous phthalimide homologue. There are just a few coal furnaces in the world where it may be discovered.
- At the lethal dosage, phthalimide has a relatively low toxic effect.
- When treated with bases like sodium hydroxide, it turns into salts.
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Sample Questions
Ques. What is meant by the term "phthalimide reaction"? (4 Marks)
Ans. A chemical process known as the Gabriel synthesis is responsible for the transformation of primary alkyl halides onto primary amines. The action has traditionally been carried out using potassium phthalimide. The term "Siegmund Gabriel process" was given to the reaction after the German scientist discovered it. In order to get amines, the procedure has been extended for uses in the alkylation of sulfonamides and esters as well as their depolymerization. Because alkynes of ammonia is not very effective, the phthalimide positive charge is used in its place in the Gabriel synthesis.
Ques. What exactly makes up the make-up of phthalimide? (4 Marks)
Ans. Phthalimide is an imido compound of phthalic acid. Phthalic acid is the parent compound. The term "amide" refers to a substituent that may be found in organic chemistry and is composed of two carbonyl groups that are bonded to nitrogen. Because they are hydrophobic and inert, they are able to traverse the cellular membranes that are present in vivo.
These chemicals have similar structural characteristics to acid anhydrides. The majority of imides are synthesis methods produced from carboxyl groups; the names of these substances reflect the acids from which they were formed.
Ques. What applications does Phthalimide have in the field of medicine? (3 Marks)
Ans. Since the diverse variety of uses that phthalimide analogues offer in medicinal chemistry, such as anti-convulsant, anti-inflammatory, painkiller, hypolipidemic, and antitumor actions, phthalimide counterparts have been utilised widely. There have been a variety of anti-inflammatory phthalimide compounds that have been developed as regulators of tumour necrosis factor-alpha (TNF-alpha). TNF-alpha is an important component of several physiologic immune systems, but an excess of it may inflict significant harm on the organism.
Ques. What exactly is naphthaline? (4 Marks)
Ans. The chemical compound known as naphthalene (NAF-thuh-leen) is a white crystallized solid that has a distinct odour that is often linked with mothballs. The chemical is of the highest quality. At room temperature, it gradually transforms from a solid into a gas, which results in the production of a vapour that is extremely flammable. A dark to a black viscous liquid known as coal tar is produced when softer types of coal are burnt with inadequate amounts of oxygen. It is made up of a convoluted combination of hydrocarbons, very much like the one that is present in petroleum. It is also possible to use it as a raw material for the production of organic chemicals that have a variety of key economic and industrial applications.
Ques. Is it dangerous for people to breathe in ammonia? (2 Marks)
Ans. Corrosive in nature, ammonia. The method of exposure, the dosage, and the length of exposure all have a role in determining the degree of the impact on one's health. The acute scorching of the eyes, nostrils, throat and circulatory tract that occurs after being exposed to high amounts of ammonia in the air may lead to complications, injury to the lungs, or even death.
Ques. What are the benefits of using ammonia in cleaning agents? (2 Marks)
Ans. Since it is effective at dissolving oil and dirt and evaporating fast, it is often used as a component in home cleansers. The result is surfaces that are clean and free of streaks. Ammonium hydroxide may be found in a wide variety of solutions, including those designed to clean windows and other types of glass, multi-purpose cleansers, oven cleaners, and even toilet bowl cleaning agents, to name just a few.
Ques. Do you recommend using ammonia to clean? (2 Marks)
Ans. Ammonia may be used as a DIY cleanser for the home either by itself or in combination with other ingredients that are already on hand. It is quite affordable. Glasses, stainless steel, and ceramics all benefit from being cleaned with this product since the sheen it leaves behind is streak-free. Additionally, it does an excellent job of eliminating baked-on grease and dirt.
Ques. Why do amines come from the breakdown of ammonia? (2 Marks)
Ans. Amines are a kind of chemical compound that is derived from ammonia by the process of replacing one or more hydrogen ions with a substitution including an alkyl or aryl atom. These can be referred to as alkylamines and arylamines, accordingly. Compounds that have two different kinds of substituents connected to the same nitrogen atom can be referred to as alkylarylamines.
Ques. Can amines make hydrogen bonds? (2 Marks)
Ans. Since they may function as both hydrogen - bonding donors and electron donors, direct and indirect amines are capable of participating in the formation of intermolecular interactions. Because they do not include any hydrogen atoms that are connected to the helium nucleus, tertiary alkali metals do not function as hydrogen bond donors. As a consequence, tertiary amines are unable to participate in the formation of intermolecular interactions.
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