1. Cholesterol (A), Cholest-4,6-dienol (B), & Ergosterol (C), shown below in that order, are all steroidhormones that play critical roles in human physiology. Using your knowledge of alkene stability, rankwhich is the most stable, the least stable, and the one of middle stability leaving notes about your logic.HOH3C RH&C(A)HOHC RH3CHOH3C(C) lomadelaWhich steroid above (A, B, or C) do you expect to have the largest Amax value, and why?As your rationale, fill in the appropriate MO diagram below showing a HOMO→LUMO, oг л→л*transition that would symbolize the electronic excitation being measured via UV/Vis spectroscopy.-:8888 4-8888 43OR(2)SH--88.3169Hyvitam-lygosgesi-------non-bonding level:88882an (no way as Jodock dooJegse garen fo-&-usind-yomib-S sevilab biza -88-8888 41(at 21)-

Based on alkene stability, we know that the more substituted the alkene, the more stable it is.…

Answered: 1. Cholesterol (A), Cholest-4,6-dienol…

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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(b) The activating and deactivating groups could affect the position(s) of the next incoming group(s) to the benzene ring. Based on the structure below, analyze and explain the group(s) on the benzene ring is activating or deactivating group. Then, identify the product(s) formed from the following reactions. NH, CC, CH;CH,COCI AICI, (i) NH, HNO, H,SO, (ii) H Br AICI, (iii) Page 3 of 4
Chemistry 3. Complete the following reaction scheme. Give all product(s) and indicate major or minor and any relevant stereochemistry. (а) NaOEt heat (b) heat (c) Br NaCN DMF (d) (e) OH H,SO,/H,PO, heat (f) HBr (g) 1) BH. THE 2) H,0, OH (h) 1) Hg(OAC), H-0 2) NaBH, (i) KMNO, NaOH Cold
1. Draw the structures of the following substituents and place them in descending order of priority. (a) Methyl, bromomethyl, trichloromethyl, ethyl; (b) 2-methyl-propyl (isobutyl), 1-methyl-ethyl (isopropyl),cyclohexyl; (c) butyl, 1-methyl-propyl (sec-butyl), 2-methyl-propyl (isobutyl), 1,1-dimethyl-ethyl (tert-butyl); (d) ethyl, 1-chloro-ethyl, 1-bromo-ethyl, 2-bromo-ethyl. 2. Check the absolute configuration of the items below: a) b) d) H "CH₂CH3 CH3 Br CH3 f F |||| H₂N- CH₂CH3 CH3 fr -COH H f) HC H- H Br HC. "ICH3 FCH₂ CH3 CH3 Br H
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(b) Consider the reaction of 1-bromobutane with a large excess of ammonia (NH3). Draw the reactants, the transition state, andthe products. Note that the initial product is the salt of an amine (RNH3+ Br - ), which is deprotonated by the excess ammonia to give the amine.
2
4. For the following reactions, develop a transition-state structure using molecular models which would account for the observed stereoselectivity. Also, describe the type of pericyclic reactions using the proper terminology. (each Br heat A & Br b) F 0°C F heat heat d) product? =& & MeO₂C OCH3 H HO 1. CO₂Me مر CO₂Me LOCH3 heat heat MeO₂C HO
NH₂ acrylamide NH2CH3 (a) 1. LiAlH4 2. H₂O (b) Diamines are used as the building blocks for the synthesis of pharmaceuticals and agrochemicals. In the above synthesis, draw the structure of the product (b). You do not have to consider stereochemistry. You do not have to explicitly draw H atoms. Include cationic counter-ions, e.g., Na* in your answer, but draw them in their own sketcher.
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Predict the organic products of the reaction. Show stereochemistry clearly. Draw the products according to the specified (R) or (S) designation for each stereocenter carbon atom. H 1) OsO4, pyridine 2) Na,SO3 or NaHSO; in H, O organic products
NH₂ NHỊCH, tipy (a) acrylamide Diamines are used as the building blocks for the synthesis of pharmaceuticals and agrochemicals. In the above synthesis, draw the structure of the product (b). ChemDoodle 1. LIAIH 2. H₂O • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • Include cationic counter-ions, e.g., Na* in your answer, but draw them in their own sketcher. OF (b) 6
Draw the structure of each of the following molecules. (a) (R)-3-chloropent-1-ene; (b) (2S,3S)-2-bromo-3-chloropentane; (c) (R)-1-bromo-(R)-2-iodocyclopentane; (d) (S)-3-chlorocyclohexene; (e) (1R,2S)-1,2-dibromocyclopentane

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