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Buniyaad NCERT Line by Line : Alcohol Phenol Ethers | Boards | NEET #neet #neet2024 #cbse

Vora Classes NEET & Boards・157 minutes read

The text discusses the classification and naming of alcohols, phenols, and ethers, emphasizing the importance of understanding nomenclature and compound formation. Various reactions, such as esterification, dehydration, oxidation, and Grignard reagent use, are explained in detail, highlighting the significance of practical knowledge for exams like JE and NEET.

Insights

  • Completion of homework is crucial, as exemplified by diligent students who share their work.
  • Detailed explanations on alcohol, phenol, and ether formation from hydrocarbons are provided.
  • Classification of alcohols based on hydroxy group attachment is explained.
  • Emphasis on understanding nomenclature and critical thinking in compound naming.
  • Various types of alcohols, including primary, secondary, and benzylic, are discussed.
  • Importance of practical applications of theoretical knowledge for exams like JE and NEET is highlighted.

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Recent questions

  • How are alcohols classified based on hydroxy groups?

    Alcohols are classified as primary, secondary, tertiary, or benzylic.

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Summary

00:00

"Alcohol, Phenol, Ether: Formation and Classification"

  • The session begins with a confirmation of audio clarity and a call to start the Buniyaad Series NCRT chapter on alcohol phenol ether.
  • The importance of completing homework is stressed, with examples of students who diligently completed and shared their work.
  • Instructions are given to watch previous sessions and download the app for free courses.
  • Detailed explanations are provided on the formation of alcohol, phenol, and ether from hydrocarbons.
  • Classification of alcohols based on the number of hydroxy groups attached to carbon chains is explained.
  • Different types of alcohols, including primary, secondary, tertiary, and benzylic alcohols, are discussed.
  • The concept of allyl alcohols and their classification is elucidated.
  • The nomenclature of ethers, including simple, symmetrical, and unsymmetrical ethers, is outlined.
  • A question is posed to classify alcohols as primary, secondary, or tertiary based on the carbon chain attachment.
  • The importance of understanding nomenclature and using critical thinking in naming compounds is emphasized.

14:40

Naming Organic Compounds: A Comprehensive Guide

  • Common name for CH3OH is methane or methyl alcohol
  • Naming compounds based on carbon atoms in the chain
  • Importance of numbering carbons for naming compounds
  • Naming compounds based on the position of functional groups
  • Naming isopropyl alcohol as a common name
  • Naming propane as Propane To All
  • Naming cyclopentanol as Cyclo Hagen
  • Naming phenol as Phenol and derivatives as methyl phenol
  • Naming cresol based on the position of functional groups
  • Naming compounds based on the number of carbon atoms and functional groups

30:23

Comparing compounds, bond angles, and exam prep.

  • Baahubali is not small in front of anyone, compare one and one, and if one is smaller, compare it with the other two.
  • Identify methyl cyclohexene and understand the alphabetical order, focusing on the functional groups.
  • Prioritize the longest chain in naming compounds and understand the numbering system based on functional groups.
  • Learn about bond angles in molecules like water, methanol, phenol, and ethers, considering steric hindrance and repulsion effects.
  • Arrange compounds in increasing order of bond angles, considering the impact of functional groups and steric hindrance.
  • Understand the importance of NCERT for exams like JE and NEET, focusing on practical applications of theoretical knowledge.
  • Explore the preparation of Alcohol, Phenol, and Ether, emphasizing the significance of practice questions for exams like mains and bitsets.
  • Differentiate between theory and practice questions in exams like mains and bitsets, highlighting the need for rigorous practice for success.

44:26

"Alcohol Synthesis: Catalysts and Reducing Agents"

  • To make alcohol from Alkin, use hydrogen in the presence of NE, PT, PD (nickel, platinum, palladium) as a reducing agent.
  • Aldehydes and ketones can be reduced to rch2oh using the mentioned catalysts.
  • Lithium aluminum hydride (LiAlH4) and sodium borohydride (NaBH4) are also effective reducing agents.
  • LiAlH4 is a strong reducing agent suitable for reducing carboxylic acids to alcohols.
  • Nickel can be used as a cost-effective alternative to LiAlH4 for reducing carboxylic acids to alcohols.
  • Ester can be reduced to alcohol by reacting with hydrogen in the presence of palladium.
  • Grignard reagent can be used to convert aldehydes and ketones to alcohols by adding it to the molecule with a poor leaving group.
  • Grignard reagent acts as a catalyst to replace the hydrogen and alkyl group in the molecule, converting it to an alcohol.
  • The process of using Grignard reagent involves adding it to the molecule with a poor leaving group, initiating a reaction to form alcohols.
  • Grignard reagent serves as a key component in converting aldehydes and ketones to alcohols, facilitating the synthesis process.

01:00:19

Family Dynamics Unfold Through Morning Chaos

  • The speaker's brother is still asleep at 9 o'clock, and the speaker advises against studying due to an impending paper.
  • The speaker's mother wakes up and hits the speaker with a slipper, causing a reaction in the speaker.
  • The speaker's mother questions the speaker about the slippers, linking them to the elder brother.
  • The speaker's mother's actions lead to a transformation from carbon positive to oxygen negative.
  • The speaker's mother's actions prompt the speaker to wake up suddenly, questioning the events.
  • The speaker's mother's actions reveal the elder brother's presence, leading to a confrontation.
  • The speaker's mother's actions result in the speaker being slapped and kicked by the elder brother.
  • The speaker's mother's actions escalate to a discussion about elder siblings and their influence.
  • The speaker's mother's actions prompt a discussion about the speaker's adoption and family dynamics.
  • The speaker's mother's actions lead to a reflection on birth certificates, names, and family relationships.

01:13:57

"Chemical Reactions and Molecular Properties Explained"

  • Children are asked intake questions about the preparation of alcohol by reacting suitable Grignard reagent on methane.
  • The importance of conditions for preparing alcohol is emphasized.
  • The teacher-student relationship is discussed, highlighting the trust and motivation between them.
  • The significance of following instructions and motivation in learning is stressed.
  • The use of Grignard reagent and Nabh4 in reactions is explained.
  • The impact of molecular structure on boiling points of alcohols and phenols is detailed.
  • The role of intermolecular hydrogen bonding in determining boiling points is explained.
  • Solubility of alcohols and phenols in water is discussed based on hydrogen bonding.
  • The relationship between molecular size and solubility is highlighted.
  • The concept of electrophilic behavior of alcohol is explained in the context of chemical reactions.

01:28:08

Acidic Properties and Stability in Chemistry

  • Acid is characterized by having more acid and a low PKA.
  • The stability of an acid determines its quality, with more stable acids being better.
  • Alcohol can be obtained by putting sodium metal inside alcohol.
  • Aluminum reacts with acid to form salt and hydrogen.
  • Phenol is a good acid due to its ability to release H+ ions.
  • Resonance stabilization occurs when phenoxide ion is formed from phenol.
  • Ethanol is less acidic compared to phenol.
  • Ortho nitrophenol is more acidic than meta nitrophenol due to resonance stabilization.
  • Para nitrophenol is more acidic than ortho nitrophenol due to intramolecular hydrogen bonding.
  • Cresol compounds can be compared based on their plus effect, with ortho cresol being the most acidic.

01:44:16

Phenol Derivatives: Acidity and Synthesis Insights

  • PK values of phenol are 10, 10.1, and 10.2, closely compared for ortho-paraf phenol.
  • Questions on JE and NEET exams often revolve around comparing phenol derivatives logically.
  • Arrange compounds in increasing acidic strength order, focusing on 2,4,6-trinitrophenol and 3,5-dinitrophenol.
  • Understanding the effects of groups like nitro on phenol acidity is crucial for logical arrangement.
  • Esterification reaction mechanism involves Carbosynth reacting with alcohol to form ester.
  • Sulfuric acid aids in esterification by absorbing water, ensuring a reversible reaction.
  • Propose the synthesis of acetylsalicylic acid (aspirin) from salicylic acid using Carbosynth.
  • Alkylation of cresol involves understanding the ortho, meta, and para positions for correct synthesis.
  • Lucas reagent aids in distinguishing alcohol reactivity classes by forming turbid tea in primary alcohols.
  • Dehydration of alcohols into alkenes involves protonation, carbocation formation, and dehydration steps.

02:00:32

Alcohol Oxidation and Dehydration Mechanisms Explained

  • The rate-determining step involves the formation of an alkene through the mechanism of hso4- taking h+ and becoming ch3ch double b ch2 alkene.
  • Dehydration of alcohol is discussed, followed by the oxidation of alcohol, where oxidation leads to the formation of aldehydes or ketones.
  • Strong oxidants like acidified kmno4 and cr3 in N Hydrous Medium are used for converting alcohols to aldehydes or acids.
  • PCC (piridi rule chlorochromate) is a better reagent for oxidizing primary alcohols to aldehydes, while concentrated kmno4 is used for converting primary alcohols to acids.
  • Tersh alcohols do not undergo oxidation under strong oxidants like kmno4 at elevated temperatures.
  • Dehydration reactions with primary alcohols and copper result in the formation of ketones, while secondary alcohols with copper form aldehydes.
  • Methanol poisoning is discussed, highlighting the conversion of methanol to formic acid, leading to blindness or death.
  • Intravenous infusion of diluted ethanol is used to treat methanol poisoning by converting methanol into methane.
  • Electrophilic aromatic substitution reactions with phenol and nitric acid are explained, leading to the formation of ortho and para nitro phenols.
  • Intra-molecular hydrogen bonding in nitro phenols is detailed, emphasizing the separation of ortho and para isomers through steam distillation.

02:15:29

Phenol Reactions and Product Formation Summary

  • Phenol reacts with bromine in low polarity solvents like carbon disulfide or chloroform at low temperatures.
  • The reaction with bromine water results in 2,4,6-tribromophenol, a white precipitate.
  • Dinitration of three-methylphenol involves adding two nitro groups, directing them to ortho and para positions.
  • Alkyne groups are placed in phenyl methane, forming mononitrophenylmethane.
  • Salicylic acid is formed from phenylmethane through nitration.
  • The Call-Beige reaction produces salicylic acid, a significant product in exams.
  • The Rim-Team reaction involves phenol, sodium phenoxide, and chloroform to create dichloro intermediates.
  • Zinc reacts with phenol to form benzene, a process used in exams.
  • Acid-catalyzed dehydration of butane leads to primary and secondary carbocations.
  • Methanol is commercially produced through destructive distillation of wood or catalytic hydrogenation of carbon monoxide.

02:33:47

"Chemical Reactions and Processes in Detail"

  • Zinc oxide in the presence of catalyst and Cr2O3 catalyst is used at a pressure of 200 to 300 atm and a temperature of 573 to 673 Kelvin for a reaction.
  • Methanol is made by reacting C with H2, and the process involves learning the necessary temperatures and details.
  • Ethanol, an alcohol, is commercially obtained through fermentation, typically from sugar sources like molasses, cane, or fruits like grapes.
  • The fermentation process involves converting glucose and fructose from sucrose using enzymes like invertase and zymase found in yeast.
  • Glucose and fructose undergo fermentation to produce ethanol and CO2, with specific enzymes like zymase playing crucial roles.
  • The colorless liquid ethanol boils at 337 Kelvin and is highly toxic if ingested, with potential conversion to methane.
  • The process of making wine from grapes involves the growth of yeast on the sugar inside the grapes, leading to fermentation and the release of carbon dioxide.
  • The preparation of ether involves reactions with concentrated H2SO4 at specific temperatures, leading to the formation of alkene or ether based on the conditions.
  • Williamson Synthesis of Ether involves reacting alkyl halides with alkoxides to produce ethers, with primary alkyl halides preferred for better results.
  • Ether's physical properties include being polar with a net dipole moment, lower boiling points compared to compounds with hydrogen bonding like butane.

02:49:13

Ether Reactions: Miscibility, Steric Hindrance, Carbocation Formation

  • Miscibility of Ether with Water: Ether and water are miscible due to hydrogen bonding, making them quite soluble.
  • R Group Hydrophobicity: The miscibility of ether in water is affected by the hydrophobic nature of the R group.
  • Shortcut for Ether Reactions: A shortcut for understanding ether reactions involves breaking the ether with AE, leading to resonance stabilization.
  • Reaction Mechanism: The reaction mechanism involves attacking H+ by ether, leading to resonance stabilization and carbocation formation.
  • Steric Hindrance in Reactions: Steric hindrance determines the reaction type, with SN2 reactions occurring where hindrance is minimal.
  • Shortcut for Carbocation Formation: Carbocation formation involves attacking from the backside where steric hindrance is least.
  • Reaction Conditions: The type of reaction (SN1 or SN2) is determined by the presence of dilute or concentrated AE.
  • Major Product Formation: The major product formed by reacting ethers with HI involves understanding the primary nature of the carbons involved.
  • Electrophilic Substitution: Electrophilic substitution reactions are influenced by the presence of active groups like bromine in ethanoic acid.
  • Friedel-Crafts Alkylation: Friedel-Crafts alkylation reactions involve the addition of CH3Cl in the presence of AlCl3 to form the desired product.

03:04:14

"Synthesis of Carbo Katay from Ethanol"

  • Starting from ethanol, the synthesis of two ethoxy three methyl pentane is discussed.
  • The reaction involves Williamson's synthesis of ether.
  • The process includes the use of phenol and ethyl bromide.
  • Carbo Katay is created with three CH3 groups on a specific carbon.
  • The importance of respecting teachers and valuing education is emphasized.
  • The teacher expresses gratitude for the support and encourages students to focus on their studies diligently.
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