(1) Some of this work mas carried out at Indiana University. can be set up. Further, if attention is directed to those DNP's in which each R group is repeated in at least two compounds, it is possible by the least squares method to obtain a unique solution for each quantity in the above equation. A first trial with 104 DNP's of aromatic, aliphatic and unsaturated aldehydes and ketones gave only fair results. Eighteen per cent. of the ...
![N-[(2,3-diphenyl-2,3-dihydroinden-1-ylidene)amino]-2,4-dinitro-aniline结构式](https://image.chemsrc.com/caspic/095/7495-10-5.png)