26) Which of the following statement(s) is(are) TRUE? a. Addition of HX to alkenes follow Markonikov's rule, forming a more stable carbocation intermediate. b. In the addition of HX to an alkene, the hydrogen atom adds to the carbon atom of the double bond that has the less number of hydrogen atoms. c. Addition of HX to alkenes follow anti-Markonikov's rule, forming a more stable carbocation intermediate. d. Addition of HX to alkenes follow anti-Markonikov's rule, forming a less stable carbocation intermediate. e. None of the above.

26) Which of the following statement(s) is(are) TRUE? a. Addition of HX to alkenes follow Markonikov's rule, forming a more stable carbocation intermediate. b. In the addition of HX to an alkene, the hydrogen atom adds to the carbon atom of the double bond that has the less number of hydrogen atoms. c. Addition of HX to alkenes follow anti-Markonikov's rule, forming a more stable carbocation intermediate. d. Addition of HX to alkenes follow anti-Markonikov's rule, forming a less stable carbocation intermediate. e. None of the above.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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a) Senarai order berikut mengikut kereaktifan meningkat tindak balas SN1 List the following order of increasing reactivity in an Syl reaction CH3Br CH,CH,CH2 (CH,),CI CH3CHBRCH3 CH:CHICH3
Item 2 Draw the organic products formed in each reaction. Consider both substitution and elimination products, if possible. Indicate the type of reaction that happened (SN1, SN2, E1, E2). Include stereochemistry and regiochemistry if relevant. For multiple products, identify which is the major and which is th]e minor product. a. b. C. d. e. H₂C 9H **** CH3 CH₂CH3 Br Br CH₂CH C6H5 Br -OC(CH3)3 OC(CH3)3 CH3CH₂OH TOH CH₂OH
Answer all questions Q1. What are the various ways by which alkenes maybe synthesized. Q2. Give two examples each of unsymmetrical alkenes and reagents. Q3. Give three examples of reactions of alkenes which tesult in anti markovnikov addition
Which of the following is true? a. Alkene reaction always results into a mixture of products because both carbons in the double bond have equal chances of being used for binding. b. Only the more stable carbon is used for binding the nucleophile in alkene/alkyne reactions.(HA) c. A mixture of addition product is always formed with internal alkenes. d. None of the above
A terminal alkyne (RC=CH) is exposed to excess HBr. What rule should be followed to determine the placement of the halogen atoms in the product? A. Markovnikov rule O B. Hofmann's rule O C. Zaitzev's rule D. Anti-Markovnikov rule
4. Name the bicyclic ring systems below. A B & B D 5. Why is the following molecule too unstable to exist?
Zaitsev’s rule: states " The alkene formed in greatest amount is the one that corresponds to A. removal of the hydrogen from the alpha-carbon having the fewest hydrogen substituents B. removal of the hydrogen from the any-carbon having the fewest hydrogen substituents C. removal of the water molecule from the alpha-carbon having the fewest hydrogen substituents D. removal of the hydroxyl (OH) from the any carbon having the fewest hydrogen substituents E. addition of hydrogen to more substituted carbon atom
Br2 ? How many moles of Br are required to completely halogenate the alkene? A. Three moles B. Four moles C. Two moles D. One mole What is the expected arrangement of the bromine atoms relative to each other among the carbon involved in pi bonding? A. trans-configuration B. anti-conformation C. cis-configuration D. syn-conformation What happens to bromine when it is adjacent to an alkene during a chemical reaction? A. Bromine becomes polarized. B. Bromine becomes acidic. C. Bromine becomes hybridized. D. Bromine becomes stable. The relative arrangement of bromine atoms in the product is primarily due to: A. Hydrogen bonding B. Electronegativity C. Atomic weight D. Repulsion What is your observation after the reaction? A. Bromine water decolorizes. B. A brown precipitate forms. C. The alkene becomes denser. D. A yellow flame is produced.
Consider the two alkene additions reactions a. What are the major products for each reaction? b. What is the mechanism for each reaction? c. Which reaction would be faster and why? Use words like “transition-state, intermediate and/or reactant/product stability” in your justification. Draw the reaction coordinate diagram for both to assist in your explanation.
1) Give the major organic product of the following reaction. Don't forget stereochemistry in certain cases. 2) Assign the reaction as addition, elimination, substitution, or rearrangement. A. B. C. D. xx D D 1. H₂O/Hg(OAc)2 2. NaBH₂ Br₂ CCI (inert solvent) H₂/Pd/C HBr Type of Reaction: Type of Reaction: Type of Reaction: Type of Reaction:
keferences Draw the structure(s) of the major organic product(s) of the following reaction. H. PPH3 THE • Use the wedge/hash bond tools to indicate stereochemistry where it exists. • If the reaction produces a racemic mixture, draw both stereoisomers. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. • Include anionic counter-ions, e.g., I-, in your answer, but draw them in their own sketcher. C opy aste
1. RCOOOH 2. CgHgMgBr 3. Mild H30* 4. H2CRO4 5. CgHgMgBr 6. H3O*, heat Work through the synthesis on a separate sheet of paper, and then draw the structure of the final organic product. • You do not have to consider stereochemistry. • Do not draw organic or inorganic by-products. opy aste C. CH3 -CH3 ČH3 49%