Alkanes- Preperation

Question 1

Reactant: Unsaturated HC
Process? Reagent?Pdt?

Answer 1

Catalytic reduction:
Reagent:
Ni(↑Temp)/Pd/Pt+H2
Pdt: Alkanes

Question 2

Reactant: Alkyl Halides
Process(2)? Reagent? Pdt?

Answer 2

a)Catalytic reduction:
Reagent:
Zn+HCl / Red P+HI
————————————
b)Wurtz reaction:
Reagent: Na+ Dry ether
Pdt:
Symmetrical alkanes(2n)
———————————-

Question 3

Reactant: Sodium Salt of Carboxylic acid
Process(2)?Reagent?Pdt?

Answer 3

a) Decarboxylation:
Reagent:
Soda lime(NaOH+CaO)
Pdt:Alkanes(n-1)
——————————–
b)Kolbe’s Electrolysis
Reagent:NaOH, Electrolysis
Pdt: Symmetrical Alkanes
(n-1)*2

Question 4

Reactant: Alkyl Halides
Process: Grignard’s Reagent

Answer 4

Grignard’s Reagent:
Reagent: RMgX + Compounds with active H

Question 5

Reactant: Alkyl Halides
Process: Corey House Synthesis
Gillman Reagent? Pdt?

Answer 5

Reagent: Li, CuX,R’X
Gillman Reagent:
R₂CuLi+LiX
Pdt: Both symmetrical and Unsymmetrical alkanes

Question 6

Reactant: Alkyl Halides
Process: Flankland’s Reagent? Pdt?

Answer 6

Reagent: Zn, R’-X’
Pdt: R-R’

Question 7

Clemmenson’s Reagent
Reactant? Reagent?

Answer 7

Reactant: Alkanones
(Carbonyl)
Reagent: ZnHg+Conc. HCl

Question 8

Process: Wolf Kishner Reduction

Answer 8

Reactant: Alcohols, Alkanones(More superior than Clemmenson’s)
Reagent: Hydrazine(NH2-NH2) +OH-