VIII, A, 3 



Pratt and Gibbs: Two Phthaloximes 



181 



drawn throughout the entire regions measured. It is sufficient 

 to state that they lie between the curve of the oxime itself and that 

 formed with one-half equivalent of alkali. 



These curves are plotted from photographs made through ab- 

 solute alcohol solutions wherever possible. Since the desired 

 concentration could not always be obtained with this solvent, 

 90 per cent alcohol was used when 1 equivalent and one-half 

 equivalent of alkali were employed in the 1/100 molar solu- 

 tions, and 99 per cent alcohol for the 1/1000 molar solutions. 

 Ninety-five per cent alcohol solutions were used for the other 

 1/100 molar concentrations. These small amounts of water have 

 no appreciable effect upon the curves. 



The difference between the yellow and the white modification 

 of the oxime is here manifested in the color absorption band. 

 This has a greater persistence in the yellow than in the white, 

 and shows that the salts of the former are somewhat more deeply 

 colored than the corresponding salts of the latter. 



18 2000 22 



Oscillation frequencies. 



24 26 28 



3000 32 



"S3 



13 



«3 



*2.8 



s 

 12.6 



3 



u 



1 

















- 



VI* 

 \V: 



\\ 



















\ \ 

 \ \ 



V\ 

 i v 





































\ x ■ 



\ 









V 









\ v ■ 



\ \ " 



\ \ 



\ \ 









y.' t 



/ V 



\ 







\ \ 



vo 







/ / 

 / / 

 • / 



* / 



f \\ 













\..' 



." r 

 ' S 



s 



S J 







\\\ 



\\\ 

 \\\ 























10,000^ 



i.ooof 



Fig. 3. Salts of white phthaloxime in 90 per cent alcohol. 

 Full curve = potassium salt. 

 Dash curve = sodium salt. 

 Dot curve = barium salt. 

 Dash and dot ourve = ammonium salt. 



