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Class 11 Chemistry Notes GOC – Carbanion

by Anand Meena
April 22, 2019
in 11th Class, Class Notes
Reading Time: 2min read
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Class 11 Chemistry Notes General Organic Chemistry - AglaSem
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Carbanion:  A Carbanion is an anion in which carbon has an unshared pair of electrons and holds a negative charge generally with three groups for eight valence electrons

  1. It is a negative charged species
  2. It has octet of electrons
  3. Diamagnetic in Nature.

Structure:

  • If negative charge is in Resonance then, Hybridization of Carbanion is sp2 (Triangular Planer Shape)
  • If negative charge is not in Resonance then the Hybridization of Carbanion is sp3 (pyramidal)

Stability:

Its stability can be determined with the help of

  1. Inductive effect
  2. Resonance effect

Ex.1 

Stability of the carbocation is as follows

Ex.2 Compare the stability of the following Carbanion

(a)  
(b) 
(c) 

Sol.      c > a > b (Stability)

Ex.3 Compare the stability of the following Carbanion

  1. -CH2CF3
  2. -CH2Cl3
  3. -CH2CBr3

Sol. a > b > c

Ex.4 Arrange the following anion ion order of their stability

  1. Cl-
  2. Br-
  3. F-
  4. I- (Maximum size)

Maximum dispersion negative charge
Maximum stability

Sol. d > b > a > c

Ex.5 Compare the Stability of the following

  1. -CH3
  2. -NH2
  3. -OH
  4. F-

Sol. Same period element (C, N, O, F)
⇒Stability ∝ E.N. of the atom
a > c > b > a

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Tags: 11 Chemistry11 Class ChemistryCBSE 11 NotesCBSE NotesChemistry for Class 11Class 11 NotesClass 11thClass 11th NotesClass XI ChemistryFree NotesXI Class

Anand Meena

Full time entrepreneur, likes to indulge in writing reviews about the latest technologies apart from helping students in career and exam related topics.

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