220 



EEPORT — 1901. 



a primary nitrogen, the simplest of which is the indophenol of ordinary 

 phenol. 



0=/ \=N-C,H,-NHo. 



Table of the indophenols studied. 



«. The displacement of the minimum of transparency (maximum of 

 absorption) under the effect of a solvent is shown by the following 

 numbers representing divisions of the micrometer eyepiece. The substance 

 was No. 1. 



Alcohol. Ether. Carbon disulphide. Chloroform. 



120 169 147 128 



The rays observed with the spectrophotometer gave the following 

 measurements : — 



Solar A. 7'0 



B. 49-5 



Li 60-5 



Solar C. 72-5 



Ca 



(^ 



Ist 104 



2nd 104 



Solar i) 1 138 



D2 139 



Tl 220 



Solar E 235 



h. "When the tertiary nitrogen had been replaced by a primary nitro- 



gen the following numbers were obtained 



Solvent, alcolwl. 



1. 120 1'. 142 displacement + 22 



2. 136 2'. 162 +26 



3. 122 3'. 142 + 20 



c. By the introduction of the following alkyl radicals into the ortho- 

 position, the displacements shown below were measured : — 



CH 



3> 



^aHg, 



CH< 



CH3 

 CH3' 



Cxio — CH.) — CHi 



1. 120 2. 136 

 3. 122 4. 134 

 7. 117 9. 136 



Solvent, alcolwl. 



displacement +16 

 + 12 

 + 19 



Subsiitation of CH3 

 CH3 

 CH, 



