FATS 59 



Ethyl alcohol, C 2 H 6 + 20H = 2H 2 + C 2 H 4 0, or 

 Ethylic aldehyde. 



If the action be upon a secondary alcohol, e.g. 

 secondary propyl-alcohol, the result is a ketone, 

 di-methyl-ketone, or acetone 



C 3 H 8 + 20H = C 3 H 6 + 2H 2 0. 



The aldehydes and ketones may be still further 

 attacked by OH ions, which, being oxidised thereby, 

 are transformed into acids. In the case of alde- 

 hydes, the H belonging to the carbonyl group is 

 displaced by the hydroxyl ; e.g. 



Methyl-aldehyde, CH 2 + 20H = H 2 + CH 2 2 



or Formic acid. 

 Ethyl-aldehyde, C 2 H 4 + 20H = H 2 + C 2 H 4 2 



or Acetic acid. 

 Propyl-aldehyde, C 3 H 6 + 20H = H 2 + C 3 H 6 2 



or Proprionic acid. 

 Butyl-aldehyde, C 4 H 8 + 20H = H 2 + C 4 H 8 2 



or Butyric acid. 



In a similar way Caproic acid, C 6 H 12 2 , is formed 

 from Hexane or normal hexyl-alcohol. Capric, 

 caprylic, lauric, myristic, palmitic, stearic, and oleic 

 fatty acids are the higher homologues of Caproic 

 acid. 



The Fats are neutral compound ethers or esters of 



fOH 

 the poly-acid alcohol, glycerine, C 3 H 8 3 or C 3 H 5 -j OH. 



IOH 



These esters are tri-glycerides, that is, the H atoms 

 of the three hydroxyls are replaced by fatty acid- 



