5. 1-2-4-6-Trinitro-Methyl-Plienylcarbamic Methyl-ester. 

 C,H,(NO,) . (NO,) . (NOJ . N(CH3) . C0\ 0(CH3) ; m. p. :118° C. 



(6) (4) (2) (I) 



This compound occurs in two modifications. 

 a-Modifi cation. 



yt\ 



Fig. 5. 



Fig. 6. 



This «-modification is the one usually deposited from the ordinary 

 solvents, alcohol, acetone, benzene etc. The crystals described here 

 have been obtained from acetone. They are colourless or of a pale 

 sherry colour and very lustrous. 



Monoclino-prismntic. 



a-.h-.c — 0,5758 ; 1 0,8382. 

 ^=75°41'. 



Forms observed : m = jllOj, broad and very lustrous ; c = jOOlj, 

 ideal reflection; (^ = |011|j large and very lustrous; «> =: |121|, 

 generally broader than q, sometimes also narrower or even completely 

 wanting ; a = |100|, lustrous but narrow ; r r= jlOlj is often wanting 

 but reflects well; o = |121| very narrow and dull. 



Measured ; 

 a-.c = (100) : (001) = * 75°41' 

 a : m = (100) : (110) — * 29 97, 

 c.q =(001): (011) = * 39 5 



Calculated : 



