As shown below, when compound 6a is heated, (1Z, 3Z)cycloheptadiene is formed. Whenthe related compound 6b is heated, however, (1E, 3Z)-cyclodecadiene is formed. Explainthese results, and suggest a reason why opening of the five-membered ring in 6a needs ahigher temperature than that of the eight-membered ring in 6b. (7 points)H270 °CH6a6bH190 °C

Both given reactions are 4 Pi electrons i.e. in the presence of heat the change their…

Answered: As shown below, when compound 6a is…

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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(8) 1.3) 2,5-Hexanedione reacts with aqueous sodium hydroxide to afford 3-hydroxy-3- methylcyclopentanone. Propose a mechanism to account for this observation. (5)
7.43 Choose the compound of molecular formula C7H13 Br that gives each alkene shown as the exclusive product of E2 elimination. (a) (b) (c) -CH3 (d) (e) (f)
Nepetalactone is the active ingredient of catnip. It is isolated as an oil from the plant Nepata cataria. Show that it is a terpene (i.e., that its carbon skeleton can be divided into isoprene units). Is the molecule chiral? How many stereoisomers are possible? H3C Nepetalactone (oil of catnip) CH3
2. Predict the major product(s) for the following reactions. Indicate stereochemistry and draw enantiomers when appropriate. Show stereochemistry with two lines in the plane and a wedge and/or dash at the chirality center. No reaction mechanisms are necessary. (a) (b) :0: H7 H H (two equiv) H₂N
4.2 10 Give the reaction mechanism showing all possible products for the following reactions: (a) Reaction of 1-propene with hydrogen bromide, HBr (g) (b) Reaction of ethene with bromine, Br₂ (1)
Gg.183.
The structure of A is shown below. HO 3 -CH2CH=CH2 A (i) Predict the possible number of stereoisomers A can have. (ii) Draw the 3D structure of the (25, 3R, 5S) enantiomer showing its correct stereochemistry. (iii) Calculate the specific rotation of each enantiomer in a mixture containing 10 mL (0.10 M) of (2S, 3R, 55) enantiomer and 30 mL (0.10 M) of (2R, 3S, 5R) enantiomer. Given the specific rotation of the mixture = +4.8°.
7.26 Predict the principal organic product of each of the following reactions. Specify stereochemistry where appropriate. ONa (a) (b) (c) (d) (e) (1) (g) (h) e (j) L OH (1) H- Br + + OH OCH3 Br Br CoHs ONa NaOH NaN3 dioxane-water Ao fo X A Br NH3 methanol HCI CHC13 -CH3 CH,SNa -H OOH (k) CH₂(CH₂)₁6CH₂OTS + CH3CH₂CH₂CH₂SNa → CGHS CH₂ONa CH3OH 1. LIAIH, diethyl ether 2. H₂O K₂CO3 acetone
7.51 You have available 2,2-dimethylcyclopentanol (A) and 2-bromo-1,1-dimethylcyclopentane (B) and wish to prepare 3,3-dimethylcyclopentene (C). Which would you choose as the more suitable reactant, A or B, and with what would you treat it? H3C CH3 H3C CH3 H3C CH3 ОН Br A B C
7.13 A proton (H+) from trifluoromethanesulfonic acid, CF3SO2OH, can add to the alkyne shown here to yield two different carbocation products. (a) Draw the mechanism for each of these steps, along with the corresponding products. (b) Which carbocation is more stable? H3C H₂ IU C-C=CH + H-OSO₂CF3 H₂ ?
7.43. A through C
(la 6L: 9. Provide the following: aniline i) the major organic product of the reaction shown, and ii) the specific name of the reaction. AICI3 CI (if o,p-substituted products are possible, only provide the major para-substituted product, otherwise, only provide the meta-substituted product) 12, HNO3 (if o,p-substituted products are possible, only provide the major para substituted product, otherwise, only provide the meta-substituted product) Send a chat

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