TopicChapter-SectionName of Videodisc DemonstrationDescription
Mechanisms and Rates of Reaction4aLight Initiated Bromination of PentaneBromine is added to 2 test tubes containing pentane. One tube is masked, and the other irradiated with light. The tube exposed to light looses bromine color and pH paper shows evolution of an acidic gas.
Structure of 3 monobrominated isomeric products are shown.
Mechanism of free radical bromination.
4bBromination of Hexane IsomersRelative rates of reaction of 2 hexane isomers with bromine in light
Mechanism of free radical bromination
4cBromination of Alkyl BenzenesBromine is added to benzene, toluene, ethyl benzene, and isopropyl benzene. Order of reactivity parallels the stability of the free radical intermediates.
Correlate with 8c -Reaction of Bromine with Benzene, Phenol, and Toluene
6cAddition of Iodine to alpha -Pinene - Relief of Ring Strainreaction of alpha -pinene (from turpentine) with iodine results in a highly exothermic reaction accompanied by a large purple cloud from sublimation of excess iodine
formerly used to treat infected horses' hooves
8bReaction of Bromine with Cyclohexane, Cyclohexene, and BenzeneBromine reacts with the double bond of cyclohexene but not with alkanes or aromatic hydrocarbons.
Addition reaction
8cReaction of Bromine with Benzene, Phenol, and TolueneBromine reacts with phenol to produce bromophenol isomers and HBr. Benzene and Toluene do not react with bromine in the absence of a catalyst.
equation
Correlate with 4c - Bromination of Alkyl Benzenes
10fNucleophilic SubstitutionSN1 and SN2 nucleophilic substitution reacts are modeled using a music stand to show inversion in SN2 and intermediate in SN1 reactions.
Equations
11bOxidation of Glycerine with Solid Potassium Permanganatedemonstrates effect of particle size on rate of reaction
redox reaction
exothermic reaction

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