CHEM 2311 Lecture Notes - Lecture 25: Styrene, Polystyrene, Racemic Mixture
Document Summary
Chapter 10 continued: order of reactivity of methane substitution with halogen is: fluorine > chlorine > Iodination has prohibitively high value of energy of activation of the first step and the reaction does not occur. Halogenation of higher alkanes: selectivity of chlorine: monochlorination of alkanes proceeds to give some selectivity . Reactions that generate tetrahedral stereogenic carbons: reaction of achiral starting materials which produces product with stereogenic carbon will produce racemic mixture. Chiral amount of r and s structures are the same. No rotation of plane polarized light radical is planar. Probability that halogen will attack from either side is unequal there is rotation of polarized plane light since we don"t mess with chiral center. Radical addition to alkenes: the anti- markovnikov addition of hydrogen bromide: addition of hydrogen bromide in presence of peroxides gives anti- markovnikov addition, other hydrogen halides do not give this type of anti- markovnikov addition.
