CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317469
Among the following, the paramagnetic species is
1 Free radical
2 Carbonium ion
3 Cabanion
4 Nitrenes
Explanation:
Free radicals contain odd electron.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317470
Which of the following free radicals is the most stable?
1 Primary
2 Methyl
3 Secondary
4 Tertiary
Explanation:
Stability order of free radical is as; Greater the number of alkyl groups attached to the carbon atom carrying the odd electrons, greater is the delocalisation of odd electron and hence, more stable is the free radical.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317471
Order of stability of vinyl,allyl,tertiary radicals is
1 tertiary, vinyl, allyl
2 vinyl, tertiary, allyl
3 tertiary, allyl, vinyl
4 allyl, tertiary, vinyl
Explanation:
The stability of alkyl free radials is not influenced by inductive effect because they have no charge (difference from carbonium and carbanions). So, they are stabilised by hyperconjugation (no bond resonance). The relative order of stability of given free radicals is, allyl > tert. > vinyl .
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
A. Electrophile, \(\mathrm{e}^{-}\)deficient, \(\mathrm{sp}^{2}\) hybridised carbon and more stable than \(\stackrel{\oplus}{\mathrm{C}} \mathrm{H}_{3}\) B. \(\mathrm{CH}_{3} \stackrel{\ominus}{\mathrm{C}} \mathrm{H}_{2}\) more basic than \(\mathrm{NH}_{3}\) as lone pair of electrons is on less electronegative carbon atom. C. \(\mathrm{CH}_{3} \dot{\mathrm{C}} \mathrm{H}_{2} \mathrm{e}^{-}\)deficient, \(\mathrm{sp}^{2}\) hybridised carbon atom. D. \(\ddot{\mathrm{C}} \mathrm{H}_{2}\) electrophile, \(\mathrm{e}^{-}\)deficient, \(\mathrm{sp}^{2}\) hybridised carbon atom.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317469
Among the following, the paramagnetic species is
1 Free radical
2 Carbonium ion
3 Cabanion
4 Nitrenes
Explanation:
Free radicals contain odd electron.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317470
Which of the following free radicals is the most stable?
1 Primary
2 Methyl
3 Secondary
4 Tertiary
Explanation:
Stability order of free radical is as; Greater the number of alkyl groups attached to the carbon atom carrying the odd electrons, greater is the delocalisation of odd electron and hence, more stable is the free radical.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317471
Order of stability of vinyl,allyl,tertiary radicals is
1 tertiary, vinyl, allyl
2 vinyl, tertiary, allyl
3 tertiary, allyl, vinyl
4 allyl, tertiary, vinyl
Explanation:
The stability of alkyl free radials is not influenced by inductive effect because they have no charge (difference from carbonium and carbanions). So, they are stabilised by hyperconjugation (no bond resonance). The relative order of stability of given free radicals is, allyl > tert. > vinyl .
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
A. Electrophile, \(\mathrm{e}^{-}\)deficient, \(\mathrm{sp}^{2}\) hybridised carbon and more stable than \(\stackrel{\oplus}{\mathrm{C}} \mathrm{H}_{3}\) B. \(\mathrm{CH}_{3} \stackrel{\ominus}{\mathrm{C}} \mathrm{H}_{2}\) more basic than \(\mathrm{NH}_{3}\) as lone pair of electrons is on less electronegative carbon atom. C. \(\mathrm{CH}_{3} \dot{\mathrm{C}} \mathrm{H}_{2} \mathrm{e}^{-}\)deficient, \(\mathrm{sp}^{2}\) hybridised carbon atom. D. \(\ddot{\mathrm{C}} \mathrm{H}_{2}\) electrophile, \(\mathrm{e}^{-}\)deficient, \(\mathrm{sp}^{2}\) hybridised carbon atom.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317469
Among the following, the paramagnetic species is
1 Free radical
2 Carbonium ion
3 Cabanion
4 Nitrenes
Explanation:
Free radicals contain odd electron.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317470
Which of the following free radicals is the most stable?
1 Primary
2 Methyl
3 Secondary
4 Tertiary
Explanation:
Stability order of free radical is as; Greater the number of alkyl groups attached to the carbon atom carrying the odd electrons, greater is the delocalisation of odd electron and hence, more stable is the free radical.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317471
Order of stability of vinyl,allyl,tertiary radicals is
1 tertiary, vinyl, allyl
2 vinyl, tertiary, allyl
3 tertiary, allyl, vinyl
4 allyl, tertiary, vinyl
Explanation:
The stability of alkyl free radials is not influenced by inductive effect because they have no charge (difference from carbonium and carbanions). So, they are stabilised by hyperconjugation (no bond resonance). The relative order of stability of given free radicals is, allyl > tert. > vinyl .
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
A. Electrophile, \(\mathrm{e}^{-}\)deficient, \(\mathrm{sp}^{2}\) hybridised carbon and more stable than \(\stackrel{\oplus}{\mathrm{C}} \mathrm{H}_{3}\) B. \(\mathrm{CH}_{3} \stackrel{\ominus}{\mathrm{C}} \mathrm{H}_{2}\) more basic than \(\mathrm{NH}_{3}\) as lone pair of electrons is on less electronegative carbon atom. C. \(\mathrm{CH}_{3} \dot{\mathrm{C}} \mathrm{H}_{2} \mathrm{e}^{-}\)deficient, \(\mathrm{sp}^{2}\) hybridised carbon atom. D. \(\ddot{\mathrm{C}} \mathrm{H}_{2}\) electrophile, \(\mathrm{e}^{-}\)deficient, \(\mathrm{sp}^{2}\) hybridised carbon atom.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317469
Among the following, the paramagnetic species is
1 Free radical
2 Carbonium ion
3 Cabanion
4 Nitrenes
Explanation:
Free radicals contain odd electron.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317470
Which of the following free radicals is the most stable?
1 Primary
2 Methyl
3 Secondary
4 Tertiary
Explanation:
Stability order of free radical is as; Greater the number of alkyl groups attached to the carbon atom carrying the odd electrons, greater is the delocalisation of odd electron and hence, more stable is the free radical.
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
317471
Order of stability of vinyl,allyl,tertiary radicals is
1 tertiary, vinyl, allyl
2 vinyl, tertiary, allyl
3 tertiary, allyl, vinyl
4 allyl, tertiary, vinyl
Explanation:
The stability of alkyl free radials is not influenced by inductive effect because they have no charge (difference from carbonium and carbanions). So, they are stabilised by hyperconjugation (no bond resonance). The relative order of stability of given free radicals is, allyl > tert. > vinyl .
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES
A. Electrophile, \(\mathrm{e}^{-}\)deficient, \(\mathrm{sp}^{2}\) hybridised carbon and more stable than \(\stackrel{\oplus}{\mathrm{C}} \mathrm{H}_{3}\) B. \(\mathrm{CH}_{3} \stackrel{\ominus}{\mathrm{C}} \mathrm{H}_{2}\) more basic than \(\mathrm{NH}_{3}\) as lone pair of electrons is on less electronegative carbon atom. C. \(\mathrm{CH}_{3} \dot{\mathrm{C}} \mathrm{H}_{2} \mathrm{e}^{-}\)deficient, \(\mathrm{sp}^{2}\) hybridised carbon atom. D. \(\ddot{\mathrm{C}} \mathrm{H}_{2}\) electrophile, \(\mathrm{e}^{-}\)deficient, \(\mathrm{sp}^{2}\) hybridised carbon atom.
