reaction of alkane and preparations

Dear Student

Preparation of Alkanes:


1. Reduction of Alkyl Halides:

RX + Zn: + H+ → RH + Zn2++ X-

4RX + LiAlH4 → 4RH + LiX + AlX3(X≠ F)

RX + (n - C4H9)3SnH → R-H + (n - C4H9)3SnX

2. Wurtz Reaction:

2RX + 2Na → R-R + 2NaX

2Na + 2CH3CH2CH2Cl → CH3CH2CH2CH2-CH2CH3+ 2NaCl

3. Decarboxylation of a mixture of the sodium salt of a carboxylic acid:

RCOONa +NaOH(CaO) → RH + Na2CO3

7. Kolbe's electrolytic method:

2 RCOOK + 2H2O → R-R + 2CO2+ H2+ 2KOH

Chemical Properties of Alkane

1. Direct Halogenation

RH+ X2→ RX + HX

Order of Reactivity of X2: F2> Cl2> Br2; I2does not react

2. Combustion:

C2H6+ 7O2→ CO2+6H2O + heat

3. Oxidization of 30alkane:

R3CH + KMnO4→ R3COH