20. a. Label the reactive features, highlight the most reactive one, then highlight what it needs. Also, state if the reaction will start to create a carbocation, carbon radical, or carbanion, or will cause loss of aromatic character. If a carbocation, carbon radical, or carbanion starts to develop, label where that will occur. HN- -c-CH3 with 2-chloro-3-methylbutane + AlCl, b. Use mechanism arrows to illustrate the reaction that occurs. c. If applicable, use stabilization resources to deal with the carbocation, carbon radical, or carbanion that starts to develop during the reaction, and draw the structure of any resonance-stabilized intermediate.

a. Label the reactive features of the following reactants, select the most reactive feature, then write and highlight what it needs. Also, state if a carbocation, carbon radical, or carbanion will start to develop, and/or if aromatic character will be lost as a result of a reaction between these molecules. bromobenzene + 2-chloro-3-methyl butane + AICI3 b. Use mechanism arrows to illustrate the reaction that occurs. If applicable, use stabilization resources to deal with the carbocation, carbon radical, or carbanion that starts to develop during the reaction, and draw the structure of any resonance- stabilized intermediate. Continue labelling and diagramming the reaction until you find the major stable product(s). Finally, state the stereochemistry of the major product(s) and use either Fisher projection or perspective formula representations to illustrate that stereochemistry.

Which of the following is true of the mechanism of the addition of HBr to an alkene? Select one: A. HBr bonds to C=C in a concerted, SYN addition process. B. The first step is the slow attachment of H+ to the C=C group to form a carbocation. C. The mechanism is a step-wise ANTI addition of H-Br to the C=C group. D. H+ bonds to the C=C group in a first, fast step, followed by the slow attachment of a Cl- nucleophile.

These are two parts of the same problem, I can't figure out how to solve these steps in a reaction

14. a. Label the reactive features, highlight the most reactive one, then highlight what it needs. Also, state if the reaction will start to create a carbocation, carbon radical, or carbanion, or will cause loss of aromatic character. If a carbocation, carbon radical, or carbanion starts to develop, label where that will occur. butanone + CH.MgBr followed by acid b. Use mechanism arrows to illustrate the reaction that occurs. c. If applicable, use stabilization resources to deal with the carbocation, carbon radical, or carbanion that starts to develop during the reaction, and draw the structure of any resonance-stabilized intermediate. d. Continue labeling and diagramming the reaction until you find the major stable product(s). e. Finally, state the stereochemistry of the major product(s) and use either Fisher projection or perspective formula representations to illustrate that stereochemistry.

Draw the major product of this reaction. Ignore inorganic byproducts. 1. (CH3)2CHNH2, Ni/H2, pH 4-5 2. Neutralizing work- up

NaOH (i). .Br NaH (). of

2) Rank these molecules by their SN2 reaction rate. If a difference in reaction rate is hard to predict, you may group molecules with similar reactivity. CI CI Br CI CI A D E B

18. a. Label the reactive features, highlight the most reactive one, then highlight what it needs. Also, state if the reaction will start to create a carbocation, carbon radical, or carbanion, or will cause loss of aromatic character. If a carbocation, carbon radical, or carbanion starts to develop, label where that will occur. 3-bromo-3-methylhexane + potassium hydroxide in THF b. Use mechanism arrows to illustrate the reaction that occurs. c. If applicable, use stabilization resources to deal with the carbocation, carbon radical, or carbanion that starts to develop during the reaction, and draw the structure of any resonance-stabilized intermediate. d. Continue labeling and diagramming the reaction until you find the major stable product(s). e. Finally, state the stereochemistry of the major product(s) and use either Fisher projection or perspective formula representations to illustrate that stereochemistry.