(a)
Interpretation:
The regio and stereoselectivity observe when
Concept Introduction:
Consider elimination reaction where
The product of the elimination reaction is depends upon the β-positions of alkyl halide. If the β-positions are identical and the products formed are also identical. If the β-positions are different and the products formed are also different. This means the double bond can form in two different regions so this type of reaction is called regioselective and the products are called as regiochemical outcomes.
If there are two different β-protons at a β-position of alkyl halide, then on the basis of stereoselectivity the trans-isomer is favored over cis-isomer.
Syn addition: When two substituents are added over double or triple bond on same side of the compound simultaneously is called syn addition.
Syn elimination: When two substituents bonded in same side of a compound gets cleaved from the substance simultaneously then the elimination is called syn elimination.
(b)
Interpretation:
The regio and stereoselectivity observe when
Concept Introduction:
Consider elimination reaction where alkenes are formed when alkyl halides are treated with bases via eliminating one β-proton and one α-halo group of the alkyl halide.
The product of the elimination reaction is depends upon the β-positions of alkyl halide. If the β-positions are identical and the products formed are also identical. If the β-positions are different and the products formed are also different. This means the double bond can form in two different regions so this type of reaction is called regioselective and the products are called as regiochemical outcomes.
If there are two different β-protons at a β-position of alkyl halide, then on the basis of stereoselectivity the trans-isomer is favored over cis-isomer.
Syn addition: When two substituents are added over double or triple bond on same side of the compound simultaneously is called syn addition.
Syn elimination: When two substituents bonded in same side of a compound gets cleaved from the substance simultaneously then the elimination is called syn elimination.
(c)
Interpretation:
The regio and stereoselectivity observe when
Concept Introduction:
Consider elimination reaction where alkenes are formed when alkyl halides are treated with bases via eliminating one β-proton and one α-halo group of the alkyl halide.
The product of the elimination reaction is depends upon the β-positions of alkyl halide. If the β-positions are identical and the products formed are also identical. If the β-positions are different and the products formed are also different. This means the double bond can form in two different regions so this type of reaction is called regioselective and the products are called as regiochemical outcomes.
If there are two different β-protons at a β-position of alkyl halide, then on the basis of stereoselectivity the trans-isomer is favored over cis-isomer.
Syn addition: When two substituents are added over double or triple bond on same side of the compound simultaneously is called syn addition.
Syn elimination: When two substituents bonded in same side of a compound gets cleaved from the substance simultaneously then the elimination is called syn elimination.
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Chapter 6 Solutions
Organic Chemistry
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- For each pair of compounds, predict which compound has a higher boiling point. then explain why that compound has a higher boiling point. (a) isopropyl bromide and n-butyl bromide (b) isopropyl chloride and tert-butyl bromide (c) 1-bromobutane and 1-chlorobutanearrow_forwardDraw a structural formula for the cycloalkene with the molecular formula CH₁0 that reacts with Cl, to give each compound. (a) Cl x D (b) CI -CH3 H₂C CI (c) Cl (d) Cl XaLaarrow_forwardGive reasons for the following :(i) Ethyl iodide undergoes SN2 reaction faster than ethyl bromide.(ii) (±) 2-Butanol is optically inactive.(iii) C—X bond length in halobenzene is smaller than C—X bond length in CH3—X.arrow_forward
- A 2-bromobutane react with methanol and form a enantiomeric pair of 2-methoxybutane. Draw the structures of the enntiomeric pairs of ethers.arrow_forwardGive each of the following structures an IUPAC name. (a) (b) H3C H3C² Н2 ОН HC. H2 Н, ОН CH3 (c) (d) НО НО Н, Н, CH ОН C H2 ОН НС. OH CH3arrow_forward5-Hydroxyhexanal forms a six-membered cyclic hemiacetal, which predominates at equilibrium in aqueous solution. (a) Draw a structural formula for this cyclic hemiacetal. (b) How many stereoisomers are possible for 5-hydroxyhexanal? (c) How many stereoisomers are possible for this cyclic hemiacetal? (d) Draw alternative chair conformations for each stereoisomer and label groups axial or Also predict which of the alternative chair conformations for each stereoisomer is more stable.arrow_forward
- Rank the compounds in each group according to their reactivity toward electrophilic substitution: (a) Chlorobenzene, o-dichlorobenzene, benzene (b) p-Bromonitrobenzene, nitrobenzene, phenol (c) Fluorobenzene, benzaldehyde, o-dimethylbenzenearrow_forwardDraw a three-dimensional structure for each compound, and star all asymmetric carbon atoms. Draw the mirror image for each structure, and state whether you have drawn a pair of enantiomers or just the same molecule twice. Build molecular models of any of these examples that seem difficult to you. (a) ОН (b) (c) NH, ОН СH—CH—СООН | pentan-2-ol pentan-3-ol alanine (d) 1-bromo-2-methylbutane (e) chlorocyclohexane (f) cis-1,2-dichlorocyclobutane (h) (i) H CH; "H H. H CH, Harrow_forwardGive an IUPAC and common name for each of the following naturally occurring carboxylic acids: (a) CH3CH(OH)CO2H (lactic acid); (b) HOCH2CH2C(OH)(CH3)CH2CO2H (mevalonic acid).arrow_forward