118 



The Philippme Journal of Science 



1914 



of general absorption, the absence of a color band at - = 2040, 



1 ^ 



and reduced persistence of the band at =^ = 3480. The ultra- 



A 



violet bands are otherwise the same in the two compounds 

 (fig. 6). 



Oscillation frequency. 

 ZOOO ZZ 24 ZS 28 JOOO 32 3'i- 3$ 38 4-000 4Z 



3.S 



3.e 



°. 32 



3.0 



2.6 



?.e 



2.4- 



o 2.2 



'- 2.0 



/.« 



(8 

 3 " 



1.4 



Fig. 6. Curve 1. Thiophthaloxime acetate in alcohol. Curve 2. Thiophthaloxime in alcohol. 



DISCUSSION OF RESULTS 



The substitution of sulphur for oxygen in phthalic anhydride 

 causes a marked change in the absorption spectrum. The band 



given by a glacial acetic acid solution is shifted from - = 3440 



1 

 to -- = 3340, and is increased threefold in persistence while still 



A 



retaining the phthalic anhydride type. General absorption 





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