gattermann koch reaction and cannizaro reaction

Gattermann-koch Reaction ;- 

When the mixture of CO and dry HCL gas is passed through an ethereal solution of Benzene having anhydrous AlCl₃ Benzaldehyde is obtained.

C₆H₆ + CO + HCl --Cu₂Cl₂/AlCl₃➝  C₆H₅CHO + HCl 

• Gatter-mann synthesis 
•  Raimer- Tiamann Reaction 
•  leaderer mannase Reaction
• Hauben Hausch Reaction  

Cannizzaro Reaction ;-

When benzaldehyde is heated with conc. NaOH or KOH one molecule is oxidised and one molecule is reduced. This is know as cannizzaro Reaction. 

2C₆H₅CHO + NaOH ➝ C₆H₅COONa + C₆H₅CH₂OH

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