When a new center of chirality is created, isomers can result. For the reaction below, specify the kinds of isomers that are produced and in what ratio they form. (For reactions you are not already familiar with, products are shown without stereochemistry.) H₂C CH₂ HBr dark
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- [References] Use the References to access important values if needed for this question. Draw the structure of the organic product that is expected when the following compound is treated with concentrated H,SO4. CH3 CH2CCH2CH3 tosH heat HO. • You do not have to consider stereochemistry. • In cases where there is more than one answer, just draw one. ed P. opy aste C. CH4 ChemDoodle Retry Entire Group 3 more group attempts remaining Submit Answer Previous Next Email Instructor Save and4. 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 HONaN3 НО. NH compound c compound d CI H₂, Pt -85 [References] compound a SOCI₂ SOCI₂ compound d compound e Moclobemide compound b CI The above reaction scheme presents one possible synthesis of the compound. Work out the synthesis on a separate sheet of paper, and then draw the structure of compound e. Consider E/Z stereochemistry of alkenes. • Do not show stereochemistry in other cases. {n [F ? ChemDoodleⓇ
- Draw the organometallic compound that would be produced by each of the following reactions. (a) (b) (c) Li(s) Mg(s). Br Mg(s) ? Ether Br H,C=c=CH THE THE Br Mg(s). ? (d) (e) 1. Li(s), THF CI Ether Br 2. Cul (f) (g) .CI 1. Li(s), THF ? Br Li(s) ? 2. CuI THE2) Show the products of the following two reactions, indicating the stereochemistry of the major isomer in each case. H₂C H.CO. OCH, OCH, LOCH, ?3. Explain, giving structures of important reaction intermediates and transition states, the stereochemical outcome of each of the following reactions. a) & 1) LDA/THF/-78°C 3) acidify (cold) R major (racemic) OH Ph + minor (racemic) OH Ph
- When a new center of chirality is created, isomers can result. For the reaction below, specify the kinds of isomers that are produce and in what ratio they form. (For reactions you are not already familiar with, products are shown without [Review Topics] [References] stereochemistry.) dark CH2 HBr H3C The produc of this reaction is(are) Submit Answer Retry Entire Group 8 more group attempts remaining (Previous Next Show Hint Email Instructor Save and Exit Cengage Learning | Cengage Technical Supportfrom Ce [Review Topics] [References] Use the References to access important values if needed for this question. Draw the structure of the organic product that is expected when the following compound is treated with concentrated H,SO4. он H2S04 CH3CCH2CH2CH3 heat ČH3 • You do not have to consider stereochemistry. • In cases where there is more than one answer, just draw one. C P. opy aste C . CH4 ChemDoodle Retry Entire Group 5 more group attempts remaining Submit Answerup an example (not appearing in this ChemActivity) of a pair of molecules that are a)constitutional isomers, b) conformers. c) configurational stereoisomers.
- Identify the major product of the reaction of an alkene shown below. ||| 1. Hg(OAc)2, H2O 2. NaBH4, NaOH ....... ОН || IV ОН о, ОНAn organic chemistry student reacted benzene (excess) with a racemic mixture of (S) and (R) enantiomers of 2-chloro-3,3-dimethylbutane in the presence of AICI3 followed by water. Which of the following represents at least 50% of the final product profile? [Note: more than one answer may or may not apply.] ok of d b a ok *** CI fFill in the boxes in the problem below to complete the reaction. STEREOCHEMISTRY EXISTS IN EACH OF THESE AND ALL POTENTIAL STEREOISOMERS THAT CAN RESULT/REACT SHOULD BE SHOWN. Et 1. BH, 2. H,O,, NAOH H,O H2 Pd For this last reaction with H2/Pd. (a) circle any chiral products. (b) Is the product mixture optically active? Yes or No (circle one!)