vni, a, 6 Pratt: Phthalides and Related Compounds 



413 



green fluorescence under the arc, and shows a strong band at 

 1 



= 2700. Two smaller bands show in the benzene region at 



= 3840 and 4170. 



24 



26 



PHTHALANIL 



C 6 H 4 ^ ^NC 6 H 5 

 C=0 



Oscillation frequency. 



26 3000 32 34 



36 



38 



2. 







/\ 



























































































\ 















































\ 



3.2 



°. 30 



C 2.8 

 v 

 t; 

 | 



1 2.6 



I 2.4 

 1 2Z 



I 2.0 



Fig. 12. Curve 1. Phthalanil in alcohol. Curve 2. Phthalanil in sulphuric acid. 



Phthalanil was prepared from aniline and phthalic anhydride 

 by distillation 10 and recrystallized from alcohol and from glacial 

 acetic acid until pure. The colorless alcohol solution gives a 



single band at ^ = 3440 (fig. 12). 



The canary yellow sulphuric acid solution also causes a single 



band that is nearer the red at -f = 3120. 



A 



Laurent und Gerhardt, Jahresber. d. Chem. (1847-48), 605. 



