281 



§ 3. II. /?-f/-FRUCTOSE-PENTA-ACETATE. 



This isomeric compound melts at 109° C. ; its specific rotation in 

 chloroform-solution is at 20° C. :[«]/> = — 120°,9 ; in benzene [a] 

 is : — 105°,5. 



The crystals here described were obtained from a solution in ether ,- 



Fig. 2. 

 ,9-cZ-Fructose-penta-acetate. 



from benzene the substance crystallises in individuals containing 1 

 molecule of benzene. 



Colourless, well-developed, prismatic crystals, which have a feebly 

 bitter taste. 



Rhomhic-hisphenoidicaL 

 a:b:c = 0,4941 : 1 : 0,9094, 

 Forms observed: q = \01ï\, very predominant, but yielding bad 

 reflexes ; b =z (010|, smaller, much better reflecting than q;r = {lOlj, 



19 

 Proceedings Royal Acad. Amsterdam Vol. XX. 



