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Chemistry. — ''On some derivatives of Phenylcarhamic acid.''* 

 By Dr. F. M. Jaegek. (Communicated by Prof. P. van Romburgh). 



The following contains a crystallographic description of some deriva- 

 tives, chiefly ?i/^roderivatives oï plienykarhamic acidO^ H^ . NH . COOH 

 which ha^'e been kindly presented to me by Prof, van Romburgh. 

 The substances belonging to this series, which have been investigated are: 

 Phenylcarhamic Methyl-ester. 

 Methylphenylcarbamic Metliyl-ester. 

 lA-Nitromethylphenylcarhamic Metliyl-ester. 

 l-2-'i-Dinitromethylphenylcarbamic Methyl-ester. 

 l-2-4:-Q-Tri7iitromethylphe7iylcarbamic Methyl-ester. (a-Modi/ication). 

 1-2-^-Q-Trinitrometliylplienylcarhamic Metliyl-ester. {^-Modification). 



l-%4:-Dinitromethylphenylcarhamic Aethyl-ester. 

 l-%^-Q-Trinitrom,ethylphenylcarhamic Aethyl-ester. 



In addition, a description is given of l-2-4:-Q-Methylp)he7iyhiitramine 

 m. p. J27°C., which has been ohia,medi'rom l-2-4:-Dinit7wnonomethyl- 

 a7iili7ie m. p. 178'' C. by means of fuming nitric acid, which aniline 

 is the product of decomposition of the two Binitromethylplienylcarhamic 

 esters on heating with strong hydrochloric acid ^), and which has been 

 aU-eady described by me in the Zeits. f. Kryst. Bd. 40 (1905). p. 119. 

 1. Phenylcarbamic Methyl-ester. 



Ce H^ . NH . CO . (CH3) ; m. p. 47° C. 



The compound crystallises best from 

 alcohol and always in the form of color- 

 less, elongated, rectangular little plates, 

 which are ^^ery poor in combination 

 forms. 



Bhombic bipy7'amidaL 



a:b = 1,5952 : 1. 

 The relation b : c cannot be determined 

 on account of the absence of planes 

 from the zones of (100,001), and of 

 (001,010). 



Forms observed : 

 predominating often 



p==|l'JO|, very lustrous; ??i = |120|, 

 narrow or totally wanting and sometimes 

 as strongly developed as ^9; ^ = |010|, 

 indicated only a few times ; c = jOOJ |, 

 reflects well. 



1) VAN Romburgh. On the action of nitric acid on the esters methylphenylamino- 

 formic acid. Proc. 29 Dec. 1900, Vol. III. p. 451. 



oj 



a = jlOOj, strongly 

 vertically striped ; 



