416 KECOKD OF SCIENCE FOR 1886. 



On PentJiiophene and its Derivatives, by Karl Krekeler. — The existence 

 of a body analogous to thiophene, but having live carbon atoms and 

 one of sulphur in a closed chain, has been foreseen by Victor Meyer and 

 others. The author obtained a methyl derivative by acting on « methyl- 

 glutaric acid with sulphide of phosphorus, this acid being derived from 

 ItBvuliuic acid, a substance on which the author has lately experimented 

 much. The body has the formula 



/ \ 

 HC C — CH3 



II II 



HC CH 



\ / 

 S 



/3-methylpenthiopheue. 



This substance forms a colorless oily liquid, boiling at 134° C; its vSpe- 

 cific gravity = 0.9938 at 19° C. It gives the Laubenheimer color-test 

 and other colored reactions. (Ber. d. chem. Ges., xix, 32GG.) 



Thiocumarine and its Derivatives^ by Fred. Tietnann. — By the action 

 of phosphorus pentasulphide on cumarine the author obtained a sulpho- 

 compound having the constitution 



CH:CU — CS 



/ ■ X 



C6H4 / 



\ 



o 



Thiocumarine. 



This crystallizes in golden needles, easily soluble in alcohol, ether, and 

 benzene, insoluble in water, and melting at 101°. By reacting on this 

 body with hydroxylamine he obtained cumaroxime in long white nee- 

 dles, melting at 131°. In appropriate ways the following compounds 

 were obtained : Cumaroximethyl ether, dihydrocumaroxime, and a 

 phenyl-hydrazine derivative of cumarine. (Ber. d. chem. Ges., xix, 

 1661.) 



Benzoic Sulphimde, or so-called " Saccharine.'''' — Dr. Ira Remsen, assisted 

 by 0. Fahlberg, in the year 1879, when engaged in researches originating 

 with the former, discovered a substance which lie named benzoic sulphi- 

 uide. This body, which may also be called anhydrosulphaminebenz »ic 

 acid, was obtained by the oxidation of orthotoluenesulphamide, and in 

 the original paper (by R. and F.) is thus described : " Benzoic sulphi- 

 nide is difficultly soluble in cold water. It is much more soluble in hot 

 water, and can be obtained in crystalline form from its aoueous solu- 



