Schmidt Rearrangement

Schmidt Rearrangement

Schmidt Rearrangement converts carboxylic acids, ketones, or aldehydes into amines and amides using hydrazoic acid. The Schmidt rearrangement is a chemical reaction involving the reaction of hydrazoic acid (HN₃) with carbonyl compounds (like carboxylic acids, ketones, or aldehydes) in the presence of acid to yield amines, amides, or nitriles, depending on the substrate. Overview of … Read more

Beckmann Rearrangement

Beckmann Rearrangement

Beckmann Rearrangement converts oximes into amides or lactams under acidic conditions, important in drug and polymer synthesis. Overview of Beckmann Rearrangement: The Beckmann rearrangement converts oximes into amides via acid-catalyzed rearrangement. Generally used for converting ketoximes into N-substituted amides. If starting from aldoximes, the product is a primary amide. General Reaction: R1–C=NOH–R2   →   R1–CONH–R2 (in … Read more

Dakin Reaction

Dakin Reaction

Dakin Reaction converts ortho- and para-hydroxy aromatic aldehydes or ketones to dihydroxybenzenes using hydrogen peroxide. Overview of Dakin Reaction: The Dakin reaction involves the oxidation of aryl aldehydes or aryl ketones, especially those with electron-donating groups (–OH or –OR) in the ortho or para position, to phenols using hydrogen peroxide in basic medium. Reagents: Hydrogen … Read more

Metal Hydride Reduction (NaBH₄ and LiAlH₄)

Metal Hydride Reduction (NaBH₄ and LiAlH₄)

Metal Hydride Reduction with NaBH₄ and LiAlH₄ converts carbonyls to alcohols, widely used in organic and medicinal chemistry. Overview: Metal hydrides like sodium borohydride (NaBH₄) and lithium aluminium hydride (LiAlH₄) are used to reduce carbonyl compounds (aldehydes, ketones, esters, carboxylic acids, etc.) to alcohols. Sodium Borohydride (NaBH₄) Structure: Na⁺[BH₄]⁻ (a tetrahedral borohydride ion) Solubility & … Read more

Oppenauer Oxidation

Oppenauer Oxidation

This article explains about Oppenauer Oxidation oxidizes secondary alcohols to ketones using aluminium alkoxide and ketone acceptors. Overview of Oppenauer Oxidation: Oppenauer oxidation is a mild, selective oxidation method used to convert secondary alcohols into ketones (and sometimes primary alcohols into aldehydes) under non-aqueous, basic conditions. Reagents: Aluminum isopropoxide (Al(O-iPr)₃) – catalyst Excess ketone (commonly … Read more

Wolff-Kishner Reduction

Wolff-Kishner Reduction

This article explains about Wolff-Kishner Reduction converts aldehydes and ketones to hydrocarbons under strong base and heat. Type: Strong base reduction Purpose of Wolff-Kishner Reduction: Converts aldehydes and ketones to alkanes, like the Clemmensen reduction. Basic conditions, so suitable for acid-sensitive compounds. Reagents: Hydrazine (NH₂NH₂) Strong base (e.g., KOH) Heat Often done in high-boiling solvents … Read more

Birch Reduction

Birch Reduction

Birch Reduction reduces aromatic rings to 1,4-dihydro derivatives using sodium and liquid ammonia in synthesis. Purpose of Birch Reduction: Reduces aromatic rings (like benzene) to non-conjugated cyclohexadienes. Partial reduction – breaks aromaticity but doesn’t fully saturate the ring. Reagents: Alkali metal (Na, Li, or K) in liquid ammonia (NH₃) Proton source (like ethanol or tert-butanol) … Read more

Clemmensen Reduction

Clemmensen Reduction

Clemmensen Reduction transforms carbonyl compounds into hydrocarbons using Zn–Hg and HCl in organic synthesis. Type: Metal-acid reduction Purpose of Clemmensen Reduction: Reduces aldehydes and ketones to alkanes. Used especially for carbonyl groups adjacent to aromatic rings (aryl ketones). Reagents of Clemmensen Reduction: Zinc amalgam (Zn(Hg)) Concentrated hydrochloric acid (HCl) Reaction is acidic Mechanism (Simplified Concept): … Read more

Kinetic Properties of Colloids

Kinetic Properties of Colloids

Kinetic properties of Colloids are related to the movement of colloidal particles due to thermal or external forces. Kinetic Properties of Colloids explain particle stability, transport, and dynamic interactions. These motions contribute to the stability and behavior of colloidal systems. 1. Brownian Motion Definition: The random, zig-zag motion of colloidal particles due to continuous collision … Read more

Interfacial Properties Of Suspended Particles

Interfacial Properties Of Suspended Particles

Interfacial Properties of Suspended Particles are key in drug formulation, emulsions, and colloidal systems. It influences, aggregation, and dispersion in suspensions. At the interface between suspended particles and the surrounding liquid, several key properties affect the behavior and stability of the suspension: Interfacial Tension Exists between the solid particle surface and the liquid. Higher tension … Read more

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