[ 275 ] 



hemical Notices^ 

 h.D., Teacher o 

 College. 



XLIII. Chemical Notices from Foreign Journals. 5y E. Atkin- 

 son, Ph.D., Teacher of Physical Science in the Cheltenham 



[Continued from vol. xvi. p. 524.] 



I^TtTURTZ had expressed the opinion that acetal is glycol, 



TT2 r O'j "1 which two atoms of hydrogen are replaced 



by two atoms of ethylc. Some experiments he has lately made* 

 have shown that, when the two atoms of hydrogen are replaced 

 by ethyle, the product is not acetal, but a body isomeric with it. 

 AYhen glycol, is treated with sodium, a very energetic action 

 ensues, with liberation of hydrogen and formation of sodium- 



glycol, Na >-0'*, a white crystalline solid. When this sub- 



stance is heated with excess of sodium at a high temperature, 



the compound ^ g fO'* is formed, or glycol in which two 



atoms of hydrogen are replaced by sodium. When the former corn- 

 er H^ 

 pound is treated with iodide of ethyle, ethyle-glycol, C'* H'^ > 0'*, 



Hj 

 an etherial body of an agreeable odour, is produced. It is 

 glycol in which one equivalent of hydrogen is replaced by 

 ethyle, and is hence quite analogous to the monoacetate of glycol, 



Q4 j|3 Q2 { Q4^ q^. o-jycoj in vvhich an equivalent of hydrogen is 



replaced by othyle. 



When ethyle-glycol is acted on by potassium, hydrogen is libe- 



rated, and the compound CH^ i- 0'' is produced j and this com- 



K J 

 pound, treated with iodide of ethyle, gives iodide of potassium 



and diethyle-glycol, ^^4 jj5)2 f 0"- 



Dicthyle-glycol is a mobde liquid, with an agreeable penetra- 

 ting etherial odoin-. It boils at 123°-5 ; is lighter than water, 

 and insoluble thci-ein. It has the same composition and vapour- 

 density as acetal, but it is only isomeric with it; their boihng- 

 points differ l)y 9.QP C. 



In glycol, two equivalents of hydrogen replaced by two equi- 

 valents of the mo:;()atomic radical C^W", give rise to diethyle- 

 glycol ; and it might be supposed that, if the two equivalents of 

 * .Comptes Rendus, August 1858. 



