18. Provide the mechanism for the catalytic hydrogenation reaction shown below. H₂ Pt H₂ H (+ entantiomer)

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Draw the major organic product for the reaction. Se H20 cat. TFOH -H

22. Draw the major organic product generated in the reaction below. CH3 1. BH3 2. H₂O₂, OH

What is the major organic product formed in the following sequence of reactions? A, B, C, or D?

Predict the product.

For each of the reactions indicate which reactant is the nucleophile and which is the electrophile.

1. Cl2, H20 2. NaOH Another mechanism for the formation of epoxides is through the formation of a chlorohydrin. Alkenes react with chlorine in the presence of H,0 to give a chlorohydrin via a cyclic chloronium ion intermediate. When the chlorohydrin is treated with strong base, HCl is eliminated and the epoxide is formed. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions

to 1. conc. HBr H20 Br OH O Na 2. Na NH2 NH3 d = El Elimination f = SN1 Nucleophilic substitution a = Proton transfer b = Lewis acid/base e = E2 Elimination g = SN2 Nucleophilic substitution c = Electrophilic addition The rections above involve synthesis or reactions of alcohols and ethers. Identify the mechanism by which they proceed from among the mechanisms listed. Use the letters a - g for your answers. 1. 2. Submit Answer Retry Entire Group 8 more group attempts remaining

Classify each of the following species as a nucleophile or an electrophile CH3 CH3-CECH CH3- -CH3 O:c EN: CH3-0-CH3 | I II III IV