(a)
Interpretation: If the reaction is proceeding under thermal conditions then the ring closure of the given compound
Concept introduction:
Woodward –Hoffmann rules are the set of rules used to vindicate or predict certain aspects of the stereo chemical outcome and activation energy of pericyclic reactions.
Woodward – Hoffmann rules for Electrocyclic reactions are listed below
(b)
Interpretation: The configuration of product has to be predicted.
Woodward –Hoffmann rules are the set of rules used to vindicate or predict certain aspects of the stereo chemical outcome and activation energy of pericyclic reactions.
Woodward – Hoffmann rules for Electrocyclic reactions are listed below
Woodward – Hoffmann rules for the configuration of electrocyclic reactions are,
(c)
Interpretation: If the reaction is proceeding under photochemical conditions then the ring closure of the given compound
Woodward –Hoffmann rules are the set of rules used to vindicate or predict certain aspects of the stereo chemical outcome and activation energy of pericyclic reactions.
Woodward – Hoffmann rules for Electrocyclic reactions are listed below
(d)
Interpretation: The configuration of the product has to be predicted.
Concept introduction:
Woodward –Hoffmann rules are the set of rules used to vindicate or predict certain aspects of the stereo chemical outcome and activation energy of pericyclic reactions.
Woodward – Hoffmann rules for Electrocyclic reactions are listed below
Woodward – Hoffmann rules for the configuration of electrocyclic reactions are,
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Organic Chemistry (8th Edition)
- Draw the structure consistent with each description. a.(2E,4E)-octa-2,4-diene in the s-trans conformation b.(3E,5Z)-nona-3,5-diene in the s-cis conformation c.(3Z,5Z)-4,5-dimethyldeca-3,5-diene. Draw both the s-cis and s-trans conformations.arrow_forwardCompound W shows stereoisomerism. Draw spatial formulae to show this isomerism Describe the physical property which could be used to distinguish between the Isomers.arrow_forwardOptically active (R)-2-bromobutane can be converted to 2-butanol under either conditions A or conditions B. Describe the stereochemistry of the product solutions for the two different conditions.arrow_forward
- a. Draw the structure or structures produced by the catalytic reduction of the given compound, in which H2 is in excess. Draw hydrogen at a chirality center and use wedge-and-dash bonds to designate the stereochemistry, if applicable. b. Select the ways in which the product or products of the reaction may be characterized. • R S ● ● Achiral ● Diastereomers • Racemic ● R, S or S,R or both • S, S ● R,R H₂ Pdarrow_forward4arrow_forwardDraw the product (s) of the following reaction. If the formation of one product is preferred over the other stereo specifically or stereoselectively, then draw Newman projections to show why. Determine the stereochemistry of the product (s).arrow_forward
- NaN3 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Ⓡarrow_forwardDehydrohalogenation of vinyl halides is essentially an E2 process. A stereochemical study revealed that (Z)-2-chloro-2-butendioic acid reacted 50 times faster than its E stereoisomer. 1. Na+ NH2 HO,C-c=c-co,H 2. H,о For the reaction below: Br 1. Na* NH2 2. H3O* H Ph a Draw the structure of the major organic product.arrow_forwardDraw the product of each electrocyclic reaction.a. the thermal electrocyclic ring closure of (2E,4Z,6Z)-nona-2,4,6-trieneb. the photochemical electrocyclic ring closure of (2E,4Z,6Z)-nona-2,4,6-trienec. the thermal electrocyclic ring opening of cis-5-ethyl-6-methylcyclohexa-1,3-diened. the photochemical electrocyclic ring opening of trans-5-ethyl-6-methylcyclohexa-1,3- dienearrow_forward
- Draw the product(s) of the following hydroboration-oxidation reactions. Disregard stereochemistry. CH3 1. B2Н6 Нзс 2. H202(аq), ЗМ NaOH -CHз Нзс Нзс 1. B2Н6 -CHз Нас 2. Н2О2(ад), ЗM NaOH Насarrow_forwardDraw all the major products resulting from the reactions below, taking into consideration both the regioselectivity and stereoselectivity of the reactions. If pairs of enantiomers form, draw both enantiomers. (NOTE: for the second reaction, draw out the hydrogen.)arrow_forward8. а. 1) CH,CO,H, 2) H,0* Draw the major product(s) showing the full mechanism. If a racemic mixture of enantiomers is expected, draw both enantiomers. b. 1) RCO3H 2) H30* Draw the major product(s) showing the full mechanism. If a racemic mixture of enantiomers is expected, draw both enantiomersarrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning