346 Mr Crocker, On the formation of Di-nitro-phenoxazines. 



I. -1266 gm. gave 21-8 c.c. N at 20° and 757 bar. pr. 



II. -2127 „ -3370 C0 2 and -0420 H 2 0. 



I. II. Calc. 



Carbon — 43-20 43-30 



Hydrogen — 2-16 1-80 



Nitrogen 19-80 — 19-68 



Amidol represents a limiting case, where the influence of the 

 second amido-group prevents the usual condensation taking place, 

 except to a slight extent ; the condensation however being subse- 

 quently effected by weakly alkaline reagents. 



Incidentally the reaction of picric chloride and alkali on 

 amido-thyrnol was examined. Only one picryl group entered, the 

 phenol OH, as might be expected, remaining intact. 



Amido-thymol (CH 3 : NH 2 : C 3 H 7 : OH = 1 : 2 : 4 : 5). 



One molecular proportion each of picric chloride and amido- 

 thymol were separately dissolved in hot dilute alcohol. Two 

 molecular proportions of soda in dilute alcohol were now added 

 rapidly, stirring meanwhile. The solution was now diluted with 

 an equal volume of water and allowed to cool, when minute 

 bronze-coloured plates separated out together with a little " tar." 

 These were filtered and washed with dilute alcohol. Crystallised 

 from a mixture of acetic and alcohol, a reddish bronze crystalline 

 powder separated out, melting at 209°. On drying at 150° a 

 purple-brown powder was obtained and the M.P. was raised to 212°. 

 The substance was easily soluble in alcohol or acetic acid. Soda 

 easily dissolved it to a red solution which darkened to reddish- 

 brown. Hence the hydroxyl group was probably intact. Crystal- 

 lised from strong alcohol the substance was obtained as dark-red 

 needles. A nitrogen determination shewed it to be the expected 

 substance picramido-thymol. 



I. -1786 substance gave 23-2 c.c. N at 18° C. and 752 bar. pr. 



II. -2770 „ „ 35-9 „ 17° „ 751 bar. pr. 



I. II. Calc. 



Nitrogen 14-94 14-94 14-89 



Calculated for C 6 H 2 (CH S ) (C 3 H 7 ) (OH) NH . C B H 2 (N0 2 ) 3 . 



