55*2 PROF. LETTS AND MR R. F. BLAKE ON 



Analysis of Crystalline Product from Experiment 1. 



~ . , , , AS)1>7 - f 0-107 H.,O = 00118 H = 542 per cent. 



Carbon and hydrogen, 0-2175 gave { ^^ ^ = ^^ Q = ^ 



Analysis of Crystalline Product from Experiment 2. 



n , , , , aoqka f 01336 H„0 = 0014844 H = 520 per cent. 



Carbon and hydrogen, 0-2850 gave j ^^ ^^^ c= ^. 08 



0bt f ned - Calculated for 



' j Yl * (C 7 H r )PH 2 S (C 7 H 7 )PHS C r H r PS 



Carbon, . . 5430 54'08 5385 54-19 54-54 



Hydrogen, . . 5-42 520 5"76 516 4-54 



The bisulphide of carbon washings from the crystals were warmed to get rid of the 

 bisulphide, and left a pale yellow gummy mass, which was insoluble in water and ether, 

 and very sparingly soluble in alcohol. No definite products could be obtained from this 

 gummy mass by the action of various reagents. It was, however, found that it was 

 soluble to a certain extent in boiling glacial acetic acid, so the whole of the product from 

 the first experiment was boiled with a large quantity of the acid. The filtered solution 

 deposited oily droplets on cooling, which eventually formed a viscous mass exactly like 

 the original substance (specimen A). The acetic solution filtered from this was 

 evaporated to dryness in a water-bath, and heated until the whole of the acetic acid 

 had volatilised. A gummy mass remained also like the original product (specimen B). 



The whole of the product from the second experiment was repeatedly boiled with 

 alcohol, then washed with cold alcohol and dried (specimen C). 



The three products were then analysed. 



Analysis. 



A. 



ft . Q „ f 01982 H = 002202 H = 505 per cent. 



4355 gave| . 8280 ^ =0 . 22 582 C = 51-80 „ 



03463 ?ave I 01595 H 2 = 001772 H= 510 per cent. 

 3463 gave j ^^ Qa = ^^ c = ^ 



C. 



f\ mak $ °' 1287 H 2° = 00143 H = 540 per cent. 



.045 gave j Q ^ 8Q ^ = 01333g c = 5Q ^ 



4889 C0 2 =013333 C =5040 



j? 



Obtained. 



A. B. C. 



51-80 5150 5041 



505 510 540 



Calculated for 

 (C 7 H 7 PHCS) 2 S 



5245 

 4-37 



Carbon, 

 Hydrogen, . 



To the best of our belief, the action of bisulphide of carbon on a primary phosphine 

 has been studied in only one other case, viz. , in that of phenyl phosphine. 



Michaelis and Dittler found that the two substances react under pressure at 150° 

 with evolution of sulphuretted hydrogen, and formation of a resin having the composition 

 (C 6 II n PHCS) 2 S, the reaction occurring according to the equation, 



2C G H 5 PH 2 + 2CS, = (C 6 H.PHCS) 2 S + H 2 S . 



