4-50 Notices of the Labours of Continental Chemists. 



is dissolved by aether, but only in small quantity; becomes 

 soft at 90° or 95° C. By distilling it is decomposed into se- 

 veral new bodies ; it is decomposed by nitric acid. Formula 

 C 14 H 12 S 2 . The oxygen of the benzoyl has therefore been 

 replaced by sulphur. [Might not the formula be C 14 H 10 S 

 <+• H 2 S, i. e. hydrosulphuret of benzoyl? Berzelius assumes 

 a radical in benzoic acid, C 14 H 10 , which he calls benzoyl. — 

 H. C] 



Hydruret of sulphazobenzoyl is formed with the above, but 

 only in small quantity. It may be obtained by mixing one 

 volume of hydrosulphuret of ammonium with a solution of one 

 volume of oil of bitter almonds in four or five volumes of 

 aether, and allowing the mixture to stand for a month ; a 

 white crystalline crust is formed, which may be purified by 

 resolution in aether, &c. This hydruret is colourless and 

 transparent, may be obtained in good crystals, oblique prisms 

 with rectangular base. It melts at 125 ; at a higher tempe- 

 rature ammonia is evolved and other products are formed. 

 Boiling alcohol slowly decomposes it. It is rapidly decom- 

 posed by warm nitric acid ; an oil (bitter almond oil ?) is 

 formed. Formula C 126 ' H 108 N 4 S 12 , or six atoms of hydruret 

 of sulphobenzoyl, and two atoms of hydrobenzamid (hy- 

 druret of azobenzoyl), 6 (C 14 H 10 S 2 + H 2 ) + 2 (C 21 H 15 N 2 

 + H 3 ). 



Hydrosulphatc of Azobenzoyl. — Equal volumes of almond 

 oil, ammonia, and hydrosulphuret of ammonium, are allowed 

 to stand six months in a closed bottle, the oil becomes almost 

 solid; on boiling the mass with aether, a small quantity of the 

 hydrosulphate remains in form of a white powder. It is al- 

 most insoluble in alcohol, somewhat soluble in aether, and 

 from this solution it may be obtained in microscopic crystals. 

 The probable formula is C 14 H 10 N 2 + H 2 S. 



Azobenzoidin. — Oil of bitter almonds, which had not been 

 purified by means of protochloride of iron and potassa, was 

 distilled, and the first two-thirds preserved, A part of this, 

 mixed in a bottle with an equal volume of ammonia, became 

 a solid mass in fourteen days; this was treated with cold 

 aether, which dissolved an oily matter, a substance crystal- 

 lizing in needles and azobenzoyl : a white powder remained, 

 which, when boiled with aether, left some benzoylazotid behind 

 mixed with another substance, and the aethereal solution gave 

 on evaporation crystals of azobenzoidin. It is colourless 

 and inodorous, almost insoluble in alcohol, somewhat soluble 

 in aether, is decomposed by boiling hydrochloric acid, forms 

 with boiling nitric acid an acid probably new. Formula, 

 C 14 H u N*. If this formula be doubled, and fifty-nine 



