(a)
Interpretation: The stereochemistry of given reaction is to be predicted.
Concept introduction: Cycloaddition reactions are pericyclic reactions that take place in two compounds containing pi bonds to form a cyclic compound. These reactions are concerted and stereospecific in nature. According to Woodward-Hoffmann rules, the polyene containing even number of bonds in thermal conditions undergoes reaction in antrafacial fashion and polyene containing odd number of bonds undergo reaction in suprafacial fashion. The total number of bonds present in the
(b)
Interpretation: The stereochemistry of given reaction is to be predicted.
Concept introduction: Electrocyclic reactions involve ring opening or ring closure in a conjugated polyene. According to Woodward-Hoffmann rules, the polyene containing even number of bonds in photochemical conditions undergoes reaction in disrotatory fashion and polyene containing odd number of bonds undergo reaction in conrotatory fashion.
(c)
Interpretation: The stereochemistry of given reaction is to be predicted.
Concept introduction: Cycloaddition reactions are pericyclic reactions that take place in two compounds containing pi bonds to form a cyclic compound. These reactions are concerted and stereospecific in nature. According to Woodward-Hoffmann rules, the polyene containing even number of bonds in photochemical conditions undergoes reaction in suprafacial fashion and polyene containing odd number of bonds undergo reaction in antrafacial fashion. The total number of bonds present in the alkenes is considered.
(d)
Interpretation: The stereochemistry of given reaction is to be predicted.
Concept introduction: Sigmatropic rearrangements are pericyclic reactions which takes place by concerted mechanism. In these rearrangements migration of sigma bond takes place. According to Woodward-Hoffmann rules, the total number of electron pairs in sigma bond that is broken and the pi bonds that rearrange. The polyene containing even number of electron pairs and bonds in thermal conditions undergoes reaction in antrafacial fashion and polyene containing odd number of electron pairs and bonds undergo reaction in suprafacial fashion.
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Chapter 25 Solutions
ORGANIC CHEMISTRY W/ALEKS
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- 6.15PM Sun Mar 30 K Draw the major product of this reaction. Include any relevant stereochemistry. Ignore inorganic byproducts. Problem 1 of O H [PhзPCH2CH3]*C|¯ NaH Drawing > Q Atoms, Bonds and Draw or tap a nearrow_forward8:17 PM Sun Mar 30 Draw the major product of this reaction. Ignore inorganic byproducts. HSCH2CH2CH2SH, BF3 Probler Drawing Ato Bonds Clarrow_forwardpresented by Mr L How the coprion. (Il Done in no wraction, dew the starting redential) доarrow_forward
- 8:16 PM Sun Mar 30 K Draw the major product of this reaction. Ignore inorganic byproducts. Proble 1. CH3MgBr 2. H3O+ F Drawingarrow_forwardо но оarrow_forwardName the major organic product of the following action of 4-chloro-4-methyl-1-pentanol in neutral pollution 10+ Now the product. The product has a molecular formula f b. In a singly hain, the starting, material again converts into a secule with the molecular kormula CIO. but with comply Draw the major organic structure inhalationarrow_forward
- Macmillan Learning Alcohols can be oxidized by chromic acid derivatives. One such reagent is pyridinium chlorochromate, (C,H,NH*)(CICTO3), commonly known as PCC. Draw the proposed (neutral) intermediate and the organic product in the oxidation of 1-butanol by PCC when carried out in an anhydrous solvent such as CH₂C₁₂. PCC Intermediate OH CH2Cl2 Draw the intermediate. Select Draw Templates More с H Cr о Product Draw the product. Erase Select Draw Templates More H о Erasearrow_forwardIf I have 1-bromopropene, to obtain compound A, I have to add NaOH and another compound. Indicate which compound that would be. A C6H5 CH3arrow_forwardProvide the reagents for the following reactions.arrow_forward
