10. In which of the following reactions can rearrangements occur? A. The addition of Br and...
Which of the following addition reactions are anti additions (lead to trans products)? (a) Br2 addition to an alkene (b) Catalytic hydrogenation of an alkene. (c) HBr addition to an alkene (d) OsO4 addition to alkene (e) All of the above Which of the following addition reactions are stereospecific? (a) Cl2 addition to a disubstituted alkene (b) HBr addition to a trisubstituted alkene (c) Radical addition of Cl2 to CH4 (d) Oxidation of a trisubstituted alkenes by using 03, Zn...
2. Which of the following addition reactions are anti additions (lead to trans products)? (a) Br2 addition to an alkene (b) Catalytic hydrogenation of an alkene. (c) HBr addition to an alkene (d) OsO4 addition to alkene (e) All of the above 3. Which of the following addition reactions are stereospecific? (a) Cl2 addition to a disubstituted alkene (b) HBr addition to a trisubstituted alkene (C) Radical addition of Cl2 to CH4 (d) Oxidation of a trisubstituted alkenes by using...
Which compound can undergo both Syl and Sy2 56. reactions? (A) H3C Br (B) H3C Br H3C "CHнз (C) (D) Br When HCI reacts with the following alkene, what major product is formed? 57. CHз HCI H3C CHз (A) A mixture of enantiomers (B) A racemic mixture (C) An achiral molecule (D) A mixture of diastereomers 58. What is the IUPAC name for this molecule? Br H3C (A) 6-bromo-3-methylcyclohexene (B) 1-bromo-4-methylcyclohex-2-ene (C) 3-bromo-6-methylcyclohexene (D) 2-bromo-5-methylcyclohexene
Which of the following addition reactions are stereospecific? (a) Cl2 addition to a disubstituted alkene (b) HBr addition to a trisubstituted alkene (c) Radical addition of Cl2 to CH4 (d) Oxidation of a trisubstituted alkenes by using O3, Zn and H2O (e) Two of the above
Which of the following is true for reactions A, B, and C? 8. CH3CH2CH,+ Br CH,CH2CH2 + HBr CH CH2CH, + Br CH CH CH3 + HBr CH CH:CH; + Cl CH,CH-СH, + HCI A C a. Reaction A has the lowest activation energy b. Reaction B is the fastest reaction c. Reaction C has the lowest activation energy d. Reaction C is the slowest reaction 9. Which of the following statements is false? a. The rates of Sy1 reactions...
Question 10 3 points Which of the following is FALSE regarding Sn2 reactions? They always occur with the inversion of stereochemistry. They occur in a single, concerted step. Rearrangements can occur due the production of a carbocation intermediate. They are the preferred reaction of primary alkyl halides.
characterize the following reactions as substitution, elimination, addition, or rearrangements Identify each of the three structures below as either chiral or achiral, reading from the left to the right side? " Select one: O a. Chiral, achiral, achiral O O b. Chiral, chiral, chiral c. Achiral, achiral, achiral d. Chiral, chiral, achiral e. Achiral, chiral, achiral o
Which of the following addition reactions are anti additions (lead to trans products)? (a) Br2 addition to an alkene (b) Catalytic hydrogenation of an alkene. (c) HBr addition to an alkene (d) OsO4 addition to alkene (e) All of the above
The following compound can be prepared by the addition of HBr to either of two alkenes, give their structures Start with the same two alkenes, would the products be different if DBr(D = deuterium) were used instead of HBr? Explain using a mechanism that outlines the tree steps of all organic chemical reactions. The reaction of alpha-pinene with H_2 in the presence o Pd/c produces A and not B. Why does product B not form?
1) For the following reactions, draw the product(s). Remember to keep in mind carbocation rearrangements, stereoselectivity (syn/anti addition) and racemic mixture of enantiomers due to formation of new chiral centers. h) Lindlar's catalyst excess CH3CH2C CH HCI H2O, H2S04 HgSo k) 1.9-BBN 2. H202. NaOH CH3CH2CH2-CEc-CH3 excess Ce CH3CH2CH2-CEC-CH3 CCI4 1 eq Br2 CCl 1. Оз 2. H20 n) o) H 1) NaNH2 H3C 2) CH3CH2CH2Br