Organic Chemistry- Reactivity of Alkanes vs. Aromatic Compounds

Bromination of Saturated and Unsaturated Hydrocarbons

Dehydration of Sugar by Sulfuric Acid

Disappearing Coffee Cup

Formation of a Silver Mirror

Organic Synthesis With Familiar Materials

Oxidation of Primary, Secondary, Tertiary Alcohols

Oxidation of Luminol

Polyurethane Foam

Underwater Fireworks: Chlorination of Acetylene

Differences in Miscibility of Organic Alcohols With Increasing Chain Length

Combustion of Cellulose Nitrate (Guncotton)

Different Smells of Carvone Isomers

Distinguishing Between HD and LD Polyethylene

Enviro-bond: Cleaning Oil Spills

Esterification Using a Dean-Stark Trap

Happy/Sad Balls

IR Demonstration I – Atomic Coupling

IR Demonstrations II – Molecular Vibrations

IR Demonstration III – Molecular Vibrations

Making a Rubber Ball from Latex

Plastic Samples

Reaction Intermediates in Organic Chemistry

Reducing Sugars and Fehling’s Solution

Rod Climbing by a Polymer Solution

Rotating Rainbows

Soap Emulsifies Hydrocarbons

Superabsorbent Polyacrylate Gel

Tubeless Siphon

Aniline Hydrochloride-Formaldehyde Polymer

Phenol-Formaldehyde Polymer

Relative Reactivity of Reducing Agents

Inductive Effect

Optical Activity of Racemic Mixtures With Limonene

Electrophilic Aromatic Substitution Reaction/EAS Reaction

Reactivity of Alkanes vs. Aromatic Compounds

Relationship of Absorbed Light to Observed Color

Density and Miscibility of Liquids

Extraction of Copper Ions from Solution with Orform®

Gel Formation with Sodium Alginate and Calcium Chloride

Hydrolysis of T-Butyl Chloride: A Lecture and Lab Experiment

Terephthalate Monomerization

Reactivity of Alkanes vs. Aromatic Compounds

In the left photo, a labeled column with orange liquid is next to a flashlight mounted on a clamp on a stand. A colorless band is seen in the orange liquid, and a shadow appears in the lower left portion of the column. In the right photo, a flashlight projects a white beam on a labeled column with red-orange liquid, and no colorless band is seen. Two shadows appear on the left side of the column.

Description: A mixture of bromine in carbon tetrachloride is added to ungraduated cylinders, one containing pentane(l) and one containing benzene(l). Both cylinders change to a red-orange color upon mixing. High intensity light is directed through the mixture in each cylinder. After several seconds, one of the solutions is made clear and colorless as a result of the light after undergoing a photolytic substitution reaction. The other solution remains unchanged.

Source: UW Card Catalog

Year: 1992 Vol: N/A Page: N/A

Keywords: Substitution Reaction, Bromine, Aromaticity, Photolysis

Rating:

Hazard: High

Flammable liquids
Acute toxicity hazard
Carcinogenicity hazard
Specific organ toxicity- Central Nervous System
Inhalation hazard
Skin corrosion hazard
Aspiration hazard
Aquatic toxicity hazard
Germ cell mutagenicity hazard

Effectiveness: Good

Results are observable without guidance
Good connection from demo to course material
Time to results is very low
Reliability is high
Counterintuitive effects are observed

Difficulty: Medium

Some careful manipulations required
Use of toxic reagents

Safety Precautions:

Eye protection and gloves required
Downdraft hood or fume hood required
ABC fire extinguisher on hand
Spill kit on hand
Avoid exposure to vapors, mists, gases, or droplets
Prevent release of reagents to the environment
10% sodium thiosulfate solution on hand

Class: Types of Organic Reactions, Photolytic Substitution

Division: Organic Chemistry, General Chemistry

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