

272 Researches respecting the radical of Benzoic Acid. 



From these numbers we obtain by volume as the theoretical result, 



14 atoms of Carbon, - - 107.018 - - 60.02 



10 " Hydrogen, - - 6.239 - - 3.51 



2* " Oxygen, - - 20.000 - - 11.55 



2 " Chlorine, - - 44.265 - - 24.92 



J 



* 



177.522 100.00 



By calculation the numbers yield a somewhat smaller quantity of 

 carbon and hydrogen than was obtained by analysis. The reason 

 undoubtedly is that in preparing the chlorine compound, perhaps 

 77 _i„ of the oil of bit. aim. escapes with the chlorine. In no case 

 is the difference of such importance, that the conclusion to which we 

 arrive respecting the composition of this body, can be considered 



false. 



With respect to the properties of chlorobenzoyl w r e have yet to re- 

 mark that by warmth it dissolves Phosphorus and sulphur, which by 

 cooling again separate in the crystalline form. With sulphuret of 

 carbon, it may be mingled in every proportion, and, as it would seem 

 without suffering decomposition. With solid chloride of phosphorus 

 it becomes strongly heated, with the formation of liquid chloride of 

 phosphorus and an oily, strongly smelling body which we have not 

 farther examined. 



The very remarkable behavior of chlorobenzoyl in dry ammoniacal 

 gas, and its decomposition with alcohol, we will treat of in a separate 

 part of this essay. 



If chlorobenzoyl be treated with metallic bromides, iodides, sul- 

 phurets or cyanurets, such an exchange of constituents ensues, 

 that a metallic chloride on the one hand, and a combination of ben- 

 zoyl with bromine, iodine, sulphur or cyanogen on the other hand, 

 are generated, which are composed similarly to the chlorobenzoyl. 



Bromobenzbyl. — This compound is formed directly by mixing bro- 

 mine with hydrobenzoyl (bitter almond oil.) The mixture becomes 

 heated and throws forth thick vapors of hydrobromic acid. By heating 

 still farther, this acid as well as the excess of bromine is expelled. 



The bromobenzoyl (bromide of benzoyl) is a large foliated, crystal- 

 line mass of a brownish color, soft and at common temperature 

 nearly semifluid. It melts by a gentle warmth into a brownish yel- 

 low fluid. It possesses an analogous odor to the chloride, though 

 much fainter and therefore aromatic. In the air it smokes faintly. 







