CHLORIDES OF NAPHTALINE. 843 



new compounds, sulphonapht aline* C 20 H 8 , SO 2 and sulphonaph- 

 talide, C 24 H 10 , SO 2 . Both are inodorous and insoluble in 

 water. 



By the action of chlorine upon naphtaline, two compounds 

 of that substance with chlorine in different proportions are 

 formed ; and by the abstraction of hydrochloric acid from these, 

 or continued action of chlorine, several other compounds are 

 produced : 



1. C 20 H 8 C1 2 =C 20 H 7 C1 +H Cl 



2. C 20 H 8 C1 4 =C 20 H 6 C1 2 + H 2 C1 2 



3. C 20 H 6 C1 2 =C 20 H 6 C] 3 



4. C 20 H 6 C1 6 =C 20 H 4 C1 4 + H 2 CJ 2 



5. C 2 oH 5 Cl 3 =C 20 H 5 Cl3 



The first of these compounds chlorhydrate of chloro-naphta- 

 lase of Laurent is formed when naphtaline absorbs chlorine gas 

 at the usual temperature ; it is a yellow oil, denser than water 

 and insoluble in it. When treated with potash it loses HC1, 

 arid gives the chloronaphtalase of Laurent, C 20 H 7 C1. 



The second, chlorhydrate of chloronaphtalese of Laurent, when 

 naphtaline is saturated with chlorine gas at 140. It crystal- 

 lizes from ether in transparent rhomboidal tables, requires a 

 temperature of 320 to fuse it, and forms a crystalline mass on 

 cooling. 



The third, chloronaphtalese of Laurent, is produced by the 

 distillation of the second, or by treating it with an alcoholic 

 solution of potash, with the separation of 2 atoms of hydro- 

 chloric acid. It crystallizes from alcohol in rhombic prisms, is 

 tasteless and inodorous, and fuses at 111.2 (44 centig.). Two 

 other isomeric compounds of the same formula exist, one an 

 oil, the other obtained by potash. 



The fourth compound, chlorhydrate of chloronaphtalose of 

 Laurent, is produced by the action of chlorine gas upon the 

 third, at the usual temperature. It much resembles the body 

 from which it is derived, fuses at 105.8 (41 centig.), and may 

 be sublimed without change. 



The fifth compound, chloronaphtalise of Laurent, is the pro- 

 duct of the action of chlorine on the first or fluid chloride of 

 naphthaline in sunshine, or with heat and subsequent distilla- 



