OP ARTS AND SCIENCES. 105 



ON PENTAMIDOBENZOL. 

 By a. W. Palmer and C. Loring Jackson. 



Presented February 13, 1889. 



Nearly two years ago, in a paper upon Tribromtrinitrobenzol,* one of 

 us in conjunction with J. F. Wing described some attempts to reduce 

 triamidotriuitrobenzol, and announced that the work would be contin- 

 ued. Before doing this, however, it seemed advisable to try similar 

 experiments with the triamidodinitrobenzol, as this substance can be 

 obtained much more easily, and the experience gained in this way 

 would be useful when we returned to the much less accessible trinitro 

 compound. Accordingly, we have undertaken together the work on 

 the dinitro compound, which has led, as we had hoped, to the prepara- 

 tion of the chloride of pentamidobenzol ; but, shortly after we had 

 sent to the Berichte der deutschen chemischen Gesellschaft a preliminary 

 notice! of this substance, a number of the same journal reached us con- 

 taining a paper by Andrew BarrJ in which the chloride of pentamido- 

 benzol was also described, and, as this paper, although it came into 

 our hands after our preliminary notice had been sent, was presented 

 to the German Chemical Society a fortnight before ours was written, 

 we have dropped this line of work in order to avoid interfering with 

 Barr, or Merz, in whose laboratory the research of Barr was carried 

 on, and publish in this paper the results which had been already ob- 

 tained by us when we received Barr's paper. § The method of making 

 pentamidobenzol used by us is different from that of Barr, who pre- 



* These Proceedings, Vol. XXIII. p. 138. 



t Ber. d. ch. G., 1888, p. 1706. 



X Ber. d. ch. G., 1888, p. 1541. 



§ The publication of this paper has been delayed until the present time, be- 

 cause the change of residence of one of us prevented us from finishing more 

 promptly the study of trianilidodinitrobenzol, a substance which does not come 

 iuto Barr's field of work. •■> 



