IJO 



alcoholates, e.g. Na[B(OCH,),], wliicli entirely possess the cliaiacter 

 of salts ill absolutely alcoholic solution — they are decoiuposed by 

 water. 



The boron is non-polarly boLiiui to the four moiio-valent 0(^H,- 

 groups, which is only possible tiiroiigh the complex having taken up 

 one electron. 



A very interesting group of compounds has been found by W. 

 Dii.THEY '). He found that when acetyl acetone-rests had substituted 

 two chlorine-atoms in BCl,, the third chlorine atom assumed the 

 character of an anion, hence the rest of a kation. He rightly calls 

 these substances boroniuiti com pounds : the considerations developed 



Fig. II. 

 Boron diacetyl acetone chloride. 



above account satisfactorily for the phenomenon. The two acetyl 

 acetone rests have as enol replaced two of the chlorine atoms of 

 BCl,, and then are bound non-polarly to the boron atom. The favour- 

 able situation of the C = 0-groiips with regard to the boron-atom 

 now gives rise to the penetration of two electrons of each of the 

 oxygen atoms into the outer shell of the boron, causing non-polar 

 bonds; this is, however, only possible, when at the same time the 

 third chlorine atom, which was at first non-polarly bound, passes 

 into the (polarly-bonnd) anion state and the boron complex 

 becomes a kation. 



1) Annalen 433, 300 (1906). 



