CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317187
Assertion : Electromeric effect is brought into play only at the requirement of the reagent. Reason : It is a temporary effect in which bond pair is shifted to one of the constituent atoms.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Electromeric effect cannot occur without the requirement of a specific reagent; it is a spontaneous and temporary effect. The reason is true; electromeric effect involves the temporary shifting of a bond pair to one of the constituent atoms, leading to a transient charge separation. So, the option (1) is correct.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317188
The effect involving the complete transfer of a shared pair of electrons to one of the atoms joined by a multiple bond at the requirement of attacking reagent is called
1 Inductive effect
2 Mesomeric effect
3 Electromeric effect
4 Hyperconjugation
Explanation:
It is the definition of electromeric effect.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317189
Identify the species from following that exhibits no bond resonance.
\(\mathrm{CH}_{3}-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}_{2}\) has \(3 \alpha-\) Hydrogen atoms. So, exhibits hyper conjugation
MHTCET - 2021
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317190
The stability order of following alkenes is
1 I \( < \) II \( < \) III \( < \) IV
2 II \( < \) I \( < \) III \( < \) IV
3 II \( < \) III \( < \) I \( < \) IV
4 II \( < \) IV \( < \) I \( < \) III
Explanation:
More substituted alkene with conjugation is more stable. Those structures which involve conjugation of two double bonds are most stable. If the conjugation is common, the stability is decided by number of \(\alpha-\mathrm{H}\)-atoms . (IV) and (III) both have double bonds in conjugation.(IV) has \(6 - {\rm{\alpha }} - {\rm{H}} - \) atoms while (III) has \(3-\alpha-\mathrm{H}-\) atoms .(I) and (II) don't have double bonds in conjugation. (II) has \(6-\alpha-\) Hydrogen atoms while (I) has \(3-\alpha-\) Hydrogen atoms.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317187
Assertion : Electromeric effect is brought into play only at the requirement of the reagent. Reason : It is a temporary effect in which bond pair is shifted to one of the constituent atoms.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Electromeric effect cannot occur without the requirement of a specific reagent; it is a spontaneous and temporary effect. The reason is true; electromeric effect involves the temporary shifting of a bond pair to one of the constituent atoms, leading to a transient charge separation. So, the option (1) is correct.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317188
The effect involving the complete transfer of a shared pair of electrons to one of the atoms joined by a multiple bond at the requirement of attacking reagent is called
1 Inductive effect
2 Mesomeric effect
3 Electromeric effect
4 Hyperconjugation
Explanation:
It is the definition of electromeric effect.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317189
Identify the species from following that exhibits no bond resonance.
\(\mathrm{CH}_{3}-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}_{2}\) has \(3 \alpha-\) Hydrogen atoms. So, exhibits hyper conjugation
MHTCET - 2021
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317190
The stability order of following alkenes is
1 I \( < \) II \( < \) III \( < \) IV
2 II \( < \) I \( < \) III \( < \) IV
3 II \( < \) III \( < \) I \( < \) IV
4 II \( < \) IV \( < \) I \( < \) III
Explanation:
More substituted alkene with conjugation is more stable. Those structures which involve conjugation of two double bonds are most stable. If the conjugation is common, the stability is decided by number of \(\alpha-\mathrm{H}\)-atoms . (IV) and (III) both have double bonds in conjugation.(IV) has \(6 - {\rm{\alpha }} - {\rm{H}} - \) atoms while (III) has \(3-\alpha-\mathrm{H}-\) atoms .(I) and (II) don't have double bonds in conjugation. (II) has \(6-\alpha-\) Hydrogen atoms while (I) has \(3-\alpha-\) Hydrogen atoms.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317187
Assertion : Electromeric effect is brought into play only at the requirement of the reagent. Reason : It is a temporary effect in which bond pair is shifted to one of the constituent atoms.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Electromeric effect cannot occur without the requirement of a specific reagent; it is a spontaneous and temporary effect. The reason is true; electromeric effect involves the temporary shifting of a bond pair to one of the constituent atoms, leading to a transient charge separation. So, the option (1) is correct.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317188
The effect involving the complete transfer of a shared pair of electrons to one of the atoms joined by a multiple bond at the requirement of attacking reagent is called
1 Inductive effect
2 Mesomeric effect
3 Electromeric effect
4 Hyperconjugation
Explanation:
It is the definition of electromeric effect.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317189
Identify the species from following that exhibits no bond resonance.
\(\mathrm{CH}_{3}-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}_{2}\) has \(3 \alpha-\) Hydrogen atoms. So, exhibits hyper conjugation
MHTCET - 2021
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317190
The stability order of following alkenes is
1 I \( < \) II \( < \) III \( < \) IV
2 II \( < \) I \( < \) III \( < \) IV
3 II \( < \) III \( < \) I \( < \) IV
4 II \( < \) IV \( < \) I \( < \) III
Explanation:
More substituted alkene with conjugation is more stable. Those structures which involve conjugation of two double bonds are most stable. If the conjugation is common, the stability is decided by number of \(\alpha-\mathrm{H}\)-atoms . (IV) and (III) both have double bonds in conjugation.(IV) has \(6 - {\rm{\alpha }} - {\rm{H}} - \) atoms while (III) has \(3-\alpha-\mathrm{H}-\) atoms .(I) and (II) don't have double bonds in conjugation. (II) has \(6-\alpha-\) Hydrogen atoms while (I) has \(3-\alpha-\) Hydrogen atoms.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317187
Assertion : Electromeric effect is brought into play only at the requirement of the reagent. Reason : It is a temporary effect in which bond pair is shifted to one of the constituent atoms.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Electromeric effect cannot occur without the requirement of a specific reagent; it is a spontaneous and temporary effect. The reason is true; electromeric effect involves the temporary shifting of a bond pair to one of the constituent atoms, leading to a transient charge separation. So, the option (1) is correct.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317188
The effect involving the complete transfer of a shared pair of electrons to one of the atoms joined by a multiple bond at the requirement of attacking reagent is called
1 Inductive effect
2 Mesomeric effect
3 Electromeric effect
4 Hyperconjugation
Explanation:
It is the definition of electromeric effect.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317189
Identify the species from following that exhibits no bond resonance.
\(\mathrm{CH}_{3}-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}_{2}\) has \(3 \alpha-\) Hydrogen atoms. So, exhibits hyper conjugation
MHTCET - 2021
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317190
The stability order of following alkenes is
1 I \( < \) II \( < \) III \( < \) IV
2 II \( < \) I \( < \) III \( < \) IV
3 II \( < \) III \( < \) I \( < \) IV
4 II \( < \) IV \( < \) I \( < \) III
Explanation:
More substituted alkene with conjugation is more stable. Those structures which involve conjugation of two double bonds are most stable. If the conjugation is common, the stability is decided by number of \(\alpha-\mathrm{H}\)-atoms . (IV) and (III) both have double bonds in conjugation.(IV) has \(6 - {\rm{\alpha }} - {\rm{H}} - \) atoms while (III) has \(3-\alpha-\mathrm{H}-\) atoms .(I) and (II) don't have double bonds in conjugation. (II) has \(6-\alpha-\) Hydrogen atoms while (I) has \(3-\alpha-\) Hydrogen atoms.
