-According to policy,I can only answer the first question.
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4. Disnes undergo 1.2-addition OR 1,4-addition with FIX and X: The major product is determined by...
I. Conjugated dienes undergo Diels-Alder reaction and form 6-membered rings. In order for this reaction to occur, the diene must be in the S-cis conformation and an alkene (dienophile) preferably with an electron-withdrawing group. EWEW EW Diene S-cis conformation Dienophile racemic product Indicate which of the following compounds can function as the diene in Diels- Alder reaction and why: doo coa 10) The rates of Diels-Alder reaction of the compounds below are compare with that of 1,3butadiene. Please explain the...
I. Conjugated dienes undergo Diels-Alder reaction and form 6-membered rings. In order for this reaction to occur, the diene must be in the S-cis conformation and an alkene (dienophile) preferably with an electron-withdrawing group. EW EW U +U Diene S-cis conformation Dienophile racemic product Indicate which of the following compounds can function as the diene in Diels- Alder reaction and why: Cli) The rates of Diels-Alder reaction of the compounds below are compare with that of 1,3butadiene. Please explain the...
This is an organic chemistry question regarding the Diels-Alder reaction. The problems are 16.22 and 16.18. I would like to know if I did these correctly. If I did not, could someone help me go through the process? er reaction Conjugation, Resonance and Dienes Chapter 16 dienophile react in a Diels-Alder CH3 C. 16.18 Draw the product formed when each diene and Problem 16.18 COOCH3 15 Specific Rules Governing the Diels-Alder Reaction 16.13A Diene Reactivity Rule [1] The diene can...
Multiple Choice, T/F Questions 1. Which of the following are TRUE (T) or FALSE (F) regarding Diels-Alder reactions? a) The reaction involves syn addition. _b) The reaction occurs in multiple steps. c) The reaction is a [4+2] A cycloaddition. d) The adduct formed fasted is the exo isomer. e) Electron donating groups activate the diene. f) Electron withdrawing groups activate the dienophile. 2. The compound at the right does not undergo Diels-Alder reaction because: a) ring systems cannot function as...
18, 22, 23 16) What diene and dienophile would react to give the product below? diere 17) Which of the following compounds is the most reactive dienophile in a Diels-Alder reaction with 1,3-butadiene? A) CH-CHOCH B) CH2-CHCHO C) CH3CHCHCH3 D) (CH3CH2 5) C .CH 18) Using resonance structures, explain the regiochemistry observed in this reaction OCH H.CO heat 19) Provide the major organic product of the following reaction H.CO ÇOCH H.COM 20) Provide the major organic product of the following...
4 Which of the fotlowing is the most reactive carhosylie acid derivative A) ester D) anhydride 2 nitrile D) acid chloride E) amide 11) Typically, amides will hydrolyse under A) stronger B) more dilute conditions than esters C) milder D) less vigorous E) more saline 12) 1-Methyleyclopentanol is classified as A) a primary aloohol B) a secondary alcohol C) a tertiary alcohol D)a phenol E) an enol 13. For a diene to undergo a Diels-Alder reaction it must: be substituted...
3) (D) Which one of the following molecular orbitals will have the highest energy? 4) Choose how many "occupied MOS" can occur for the conjugated t-system of B-carotene and LED compounds? NH beta-carotene (a) 22 and 6 5) The diene LED material (b) 11 and 6 (c) 22 and 12 (d) 11 and 12 is not suitable for Diels-Alder [4+2) cycloaddition? 6) Which one of bicyclic isomers is appropriate for both Diels-Alder and 1,2-/1.4-additions? 7) Both 1.2- and 1,4-additions of...
Critical Thinking Questions 1. Draw the structure for the product from the reaction of 1,3-cyclohexadiene and maleic acid (cis-2-butenedioic acid). 2. What is the product expected from the reaction of 1,3-butadiene and 3-sulfolene? Why is this not a major concern as a by-product? Part B, the dimer dicyclopentadiene is a possible contaminant of cyclopentadi- ene. It is also a diene. Can dicyclopentadiene undergo reaction with cyclopentadi- ene? Can dicyclopentadiene act as a diene and undergo reaction with the anhydride 3....
сн, Нас 12-addition products (direct addition) CH2 CH3 Н,с Н-с CH CI HCI CH2 Cн Н.с 1,4-addition products (conjugate addition) Cн CH3 Нас Н.С CI Electrophilic addition to an alkene proceeds via Markovnikov regiochemistry due to the formation of the more stable carbocation intermediate. In the case of conjugated dienes, that is dienes that are separated by one sigma bond, the carbocation that is formed is stabilized additionally by resonance. Addition of the nucleophile to the carbocation intermediate can therefore...
eglon is wed is TH NMR spectroscopy B) ultraviolet D) microwave ) infraed ymcasures the energy required to promote an electron from the_ molecular orbital to the A) highest occupied, lowest unoccupied B) lowest occupied, lowest unoccupied D) highest occupied, highest unoccupied molecular orbital 10. Which good solvents in organic reactions? of the following is not a property of ethers which makes them A) They dissolve a wide range of polar substances. B) They have relatively high boiling points for...