40 JOURNAL OF THE 



tory results and as concordant as results obtained in most any other 

 kind of determination. 



I had thought of making check determinations on my results in 

 samples 2, 3, 4, 5 and 6, but the satisfactory agreement of the re- 

 sults of the three determinations of 1, made me consider further 

 work unnecessary. . 



F. B. DANCY. 



Agricultural Experiment Station, Raleigh, N. C. 



PROPENYL-ISO-TOLUYLEN-AMID1NE-. 



(PrOPIONYL-ANHYDRO-ISO DIAMIDO-TOLUOL.) 



J. M. PICKEL. 



Amidines are, as defined by Beilstein (Handbuch der Org. Chem. 

 p. 225), acet amides in which the atom of Oxygen is replaced by the 

 bivalent group NR. Thus, C^Hy CONH,, an amide, becomes 

 C^H C(NH)NHo, an amidine, when O is displaced by (NH). The 

 H's both of the group NH and of NHg may, of course, be replaced 

 by carbo-hydrogen radicals, e. g., CH3OH0 C—S^p'^tt! propenyl- 

 diphenylamidine. If, instead of the two phenyl groups, we have 

 the bivalent toluylen group, CgHgCHg, the compound becomes 

 CH3CH2 C— NM^eHgCHg propenyltoluylenamidine. Compounds 



of this last class are anhydrous. Two special examples will illus- 

 trate the two ways of making them : 



1. Ortho phenylendiamine is heated with acetic acid. 



NHCiaCH. 



^^^^NHo +CH.COIQH 



= ^2^ + ^«^^ NlHo 



CeH4^^^C.CH, x2HiO. 



*An abstract of experiments undertaken at the suggestion of the late Prof. 

 Hiibner and executed in his laboratory at G6ttingen. J. M. P, 



