196 Proceedings of the Royal Irish Academy. 



water-bath, a yellow crystalline solid separated. The solid was filtered 

 washed with water and alcohol, dried, and recrystallized from chloroform and 

 alcohol. When dried at 105° C, it softened at 212° C, melted at 216-217° C, 

 and gave on analysis the following results : — 



0-1299 substance gave 0*3294 C0 2 and 0-0692 H 2 0, 

 corresponding to C 69-17, H 5-92, 

 C 30 H, O s requires C 69-46, H 5-84. 



Diveratrylidene-diacetoresorcinol-dimethylether crytallizes from chloroform 



and alcohol in light yellow prisms which are insoluble in water, dilute potash, 



petroleum ether, or ligroin, scarcely soluble in alcohol, ether, or toluene, 



soluble in benzene, and readily soluble in chloroform. 



A solution of the substance in concentrated sulphuric acid has a deep red 



colour. An alcoholic solution of the substance gives no coloration with 



ferric chloride. 



(2) Diveratrylidene-Diacetoresorcinol. 



_OCH s 



0H CO . CH : CH-/ V° CH 3 

 / \ X / 



0H CO . CH : CH-/ \-OCH 3 

 OCH 3 

 A solution of 2 grams of diacetoresorcinol and 3*5 grams of veratric 

 aldehyde in 50 c.cs. of absolute alcohol was heated to gentle boiling on a 

 sand-bath, and to it 5 c.cs. of 50 per cent, sodium hydrate were added 

 gradually. After a short time the sodium derivative of diacetoresorcinol 

 separated, which, on further heating, redissolved. By continuing the heating 

 for half an hour the orange-coloured sodium derivative of diveratrylidene- 

 diacetoresorcinol separated. On addition of alcohol a further precipitate was 

 obtained. The solid was filtered, washed with alcohol, dissolved in water, 

 and precipitated by addition of dilute hydrochloric acid. When recrystallized 

 several times from chloroform and alcohol it softened at 193° C, melted at 

 194-196° C, and gave on analysis the following results : — 



0-1230 substance gave 0-3080 CO, and 0-0588 H 2 0, 

 corresponding to C 68-3, H 5*3. 

 C^H^O, requires C 68-5, H 5-3. 

 Diveralrylidene-diacdoresorcinol crystallizes from chloroform and alcohol 

 in light orange-yellow acicular prisms. It dissolves easily in chloroform, 

 slightly in benzene, and with difficulty in alcohol or ether. It is insoluble 

 in water, and dissolves readily in dilute aqueous alkali. 



An alcoholic solution of the substance gives a red coloration with ferric 

 chloride. 



