Preparation, Structure and Stability of Reaction Intermediates
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317440 A solution of (-) -1-chloro-1-phenylethane in toluene racemises slowly in the presence of a small amount of \(\mathrm{SbCl}_{5}\), due to the formation of

1 Carbanion
2 Carbene
3 Carbocation
4 Free radical
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317441 Number of lone pair(s) present in methyl carbocation are

1 2
2 3
3 1
4 0
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317442 What is the correct order of decreasing stability of the following cations.
(I) \(\mathrm{CH}_{3}-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}-\mathrm{CH}_{3}\)
(II) \(\mathrm{CH}_{3}-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}-\mathrm{OCH}_{3}\)
(III) \(\mathrm{CH}_{3}-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}-\mathrm{CH}_{2}-\mathrm{OCH}_{3}\)

1 II \(>\) I \(>\) III
2 II \(>\) III \(>\) I
3 III \(>\) I \(>\) II
4 I \(>\) II \(>\) III
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317443 The decreasing order of the stability of ions,
\({\text{C}}{{\text{H}}_3} - \mathop {\mathop {\text{C}}\limits^ + }\limits_{\text{I}} {\text{H}} - {\text{C}}{{\text{H}}_3}{\text{ C}}{{\text{H}}_3} - \mathop {\mathop {\text{CH}}\limits^ + }\limits_{{\text{II}}} - {\text{OC}}{{\text{H}}_3}\)
\({\text{C}}{{\text{H}}_3} - \mathop {\mathop {\text{CH}}\limits^ + - {\text{COC}}{{\text{H}}_3}}\limits_{{\text{ III }}} \)

1 I \(>\) II \(>\) III
2 III \(>\) II \(>\) I
3 II \(>\) III \(>\) I
4 II \(>\) I \(>\) III
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317440 A solution of (-) -1-chloro-1-phenylethane in toluene racemises slowly in the presence of a small amount of \(\mathrm{SbCl}_{5}\), due to the formation of

1 Carbanion
2 Carbene
3 Carbocation
4 Free radical
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317441 Number of lone pair(s) present in methyl carbocation are

1 2
2 3
3 1
4 0
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317442 What is the correct order of decreasing stability of the following cations.
(I) \(\mathrm{CH}_{3}-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}-\mathrm{CH}_{3}\)
(II) \(\mathrm{CH}_{3}-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}-\mathrm{OCH}_{3}\)
(III) \(\mathrm{CH}_{3}-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}-\mathrm{CH}_{2}-\mathrm{OCH}_{3}\)

1 II \(>\) I \(>\) III
2 II \(>\) III \(>\) I
3 III \(>\) I \(>\) II
4 I \(>\) II \(>\) III
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317443 The decreasing order of the stability of ions,
\({\text{C}}{{\text{H}}_3} - \mathop {\mathop {\text{C}}\limits^ + }\limits_{\text{I}} {\text{H}} - {\text{C}}{{\text{H}}_3}{\text{ C}}{{\text{H}}_3} - \mathop {\mathop {\text{CH}}\limits^ + }\limits_{{\text{II}}} - {\text{OC}}{{\text{H}}_3}\)
\({\text{C}}{{\text{H}}_3} - \mathop {\mathop {\text{CH}}\limits^ + - {\text{COC}}{{\text{H}}_3}}\limits_{{\text{ III }}} \)

1 I \(>\) II \(>\) III
2 III \(>\) II \(>\) I
3 II \(>\) III \(>\) I
4 II \(>\) I \(>\) III
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317440 A solution of (-) -1-chloro-1-phenylethane in toluene racemises slowly in the presence of a small amount of \(\mathrm{SbCl}_{5}\), due to the formation of

1 Carbanion
2 Carbene
3 Carbocation
4 Free radical
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317441 Number of lone pair(s) present in methyl carbocation are

1 2
2 3
3 1
4 0
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317442 What is the correct order of decreasing stability of the following cations.
(I) \(\mathrm{CH}_{3}-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}-\mathrm{CH}_{3}\)
(II) \(\mathrm{CH}_{3}-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}-\mathrm{OCH}_{3}\)
(III) \(\mathrm{CH}_{3}-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}-\mathrm{CH}_{2}-\mathrm{OCH}_{3}\)

1 II \(>\) I \(>\) III
2 II \(>\) III \(>\) I
3 III \(>\) I \(>\) II
4 I \(>\) II \(>\) III
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317443 The decreasing order of the stability of ions,
\({\text{C}}{{\text{H}}_3} - \mathop {\mathop {\text{C}}\limits^ + }\limits_{\text{I}} {\text{H}} - {\text{C}}{{\text{H}}_3}{\text{ C}}{{\text{H}}_3} - \mathop {\mathop {\text{CH}}\limits^ + }\limits_{{\text{II}}} - {\text{OC}}{{\text{H}}_3}\)
\({\text{C}}{{\text{H}}_3} - \mathop {\mathop {\text{CH}}\limits^ + - {\text{COC}}{{\text{H}}_3}}\limits_{{\text{ III }}} \)

1 I \(>\) II \(>\) III
2 III \(>\) II \(>\) I
3 II \(>\) III \(>\) I
4 II \(>\) I \(>\) III
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317440 A solution of (-) -1-chloro-1-phenylethane in toluene racemises slowly in the presence of a small amount of \(\mathrm{SbCl}_{5}\), due to the formation of

1 Carbanion
2 Carbene
3 Carbocation
4 Free radical
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317441 Number of lone pair(s) present in methyl carbocation are

1 2
2 3
3 1
4 0
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317442 What is the correct order of decreasing stability of the following cations.
(I) \(\mathrm{CH}_{3}-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}-\mathrm{CH}_{3}\)
(II) \(\mathrm{CH}_{3}-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}-\mathrm{OCH}_{3}\)
(III) \(\mathrm{CH}_{3}-\stackrel{\oplus}{\mathrm{C}} \mathrm{H}-\mathrm{CH}_{2}-\mathrm{OCH}_{3}\)

1 II \(>\) I \(>\) III
2 II \(>\) III \(>\) I
3 III \(>\) I \(>\) II
4 I \(>\) II \(>\) III
CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317443 The decreasing order of the stability of ions,
\({\text{C}}{{\text{H}}_3} - \mathop {\mathop {\text{C}}\limits^ + }\limits_{\text{I}} {\text{H}} - {\text{C}}{{\text{H}}_3}{\text{ C}}{{\text{H}}_3} - \mathop {\mathop {\text{CH}}\limits^ + }\limits_{{\text{II}}} - {\text{OC}}{{\text{H}}_3}\)
\({\text{C}}{{\text{H}}_3} - \mathop {\mathop {\text{CH}}\limits^ + - {\text{COC}}{{\text{H}}_3}}\limits_{{\text{ III }}} \)

1 I \(>\) II \(>\) III
2 III \(>\) II \(>\) I
3 II \(>\) III \(>\) I
4 II \(>\) I \(>\) III
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here