344 Mr Crocker , On the formation of Di-nitro-phenoxazines. 
When heated in a melting-tube the substance decomposed 
slowly at about 274° with the formation of a brown film. 
Amidol (di-amido-phenol OH : NH 2 : NH 2 = 1 : 2 : 4). 
2 5 gm. of picric chloride were dissolved in hot dilute alcohol, 
and the solution was mixed with a dilute alcoholic solution of 
*98 gm. amidol hydrochloride, the temperature being kept at 
55° — 65°. *7 gm. potash in alcohol (2^ molecules KOH) was run 
in carefully, drop by drop, from a burette, the liquid being stirred 
well. Minute dark-red plates settled out during the process and 
on cooling. The yield was 2*4 gm. It melted at 180 — 5°. The 
latter melting-point was obtained after twice crystallising from 
glacial acetic acid. 
Analysis shewed the substance to be di-picramidol. 
I. -2190 gm. dried 100° gave 39*4 c.c. N at 20° and 759 bar. pr. 
II. *2370 gave 42-0 c.c. N at 22° and 762 bar. pr. 
/OH 
I. 
II. 
Calc. C 6 H 3 — NH . Pi* 
>V \NH . Pi 
Nitrogen 
20-69 
20-30 
* Pi=C 6 H 2 (N0 2 ) 3 . 
20-55 
The substance consisted of minute dark-red plates, difficultly 
soluble in alcohol, fairly easily soluble in glacial acetic acid, easily 
soluble in cold potash to a dark-brown solution, reprecipitated b}^ 
HC1. This shewed the phenolic character of the body. Heated 
in a dry tube it first melted and then decomposed explosively. 
The phenolic hydrogen is replaced by the acetyl group when 
the substance is acted on by a mixture of acetyl chloride and 
sodium acetate. 
2*6 gm. of di-picramidol were heated for one hour in a reflux 
apparatus, with excess of acetyl chloride and sodium acetate. A 
yellow precipitate formed. The whole was poured into water, 
filtered and washed. The yield was 2 5 gm. of a substance, which 
melted, after recrystallisation from dilute acetic acid, at 223°. The 
substance crystallised in minute reddish-yellow plates. 
•2670 gm. gave 453 c.c. N at 19° and 757 bar. pr. 
Calc. 
Nitrogen 19*56 1905 
Hence the substance was di-picramidylic acetate 
^ O . Ac 
C(jH 3 — N H . Pi 
^NH.Pi 
When di-picramidol was dissolved in aniline, in which it is 
