114 Messrs. A. H. Church and E. Owen on the Bases 



nium, for so we provisionally name the salt just described, by 

 the direct union of cespitinc and bichloride of platinum, led to 

 no definite result. The bichloride of plato-cespityl-ammonium 

 is not altered by continued ebullition, but may be crystallized 

 from boiling water. 



The metamorphosis of the platinum salt of cespitinc pointed 

 to an essential difference between that base and amylamine ; and 

 this difference is the more remarkable, since the true amylamine 

 has been detected by Greville Williams and by Anderson among 

 the products of the destructive distillation of several organic 

 substances. An experiment was made, however, in order to 

 establish this distinction more conclusively. One volume of pure 

 cespitinc was digested in a sealed tube at 120° C. for several 

 days with 8 or 10 volumes of iodide of ethyle. On opening the 

 tube no escape of hydriodic acid gas occurred, but on shaking 

 up its contents with water, and evaporating the aqueous solution, 

 a syrup was obtained which did not show the least tendency to 

 crystallize even in vacuo over sulphuric acid ; the iodide of ethyl- 

 amyl-ammonium is easily crystallizable. On the addition of 

 oxide of silver to this syrup after it had been diluted with water, 

 an alkaline and caustic liquid was obtained, but no volatile base 

 separated ; had the cespitine been in reality amylamine, ethyl- 

 amylamine should have been formed, together with other bases 

 containing more ethyle. But no such substitution had taken 

 place ; the cespitine, being a nitryle base containing no hydro- 

 gen thus replaceable, had merely combined with 1 equiv. of iodide 

 of ethyle to form a salt. The alkaline solution of the ethyle 

 derivative was now neutralized with hydrochloric acid, and pre- 

 cipitated with bichloride of platinum ; a buff-coloured curdy 

 precipitate was formed, which, when washed and then recrystal- 

 lized from warm water, yielded very voluminous micaceous plates 

 of a straw colour. These crystals were almost insoluble in cold 

 water. The following determinations proved them to be the 

 platinum salt of ethyl-cespityl-ammonium : — 



I. 0*4295 grm. gave 0*132 grm. platinum. 



II. 0*338 grm. gave 0*1037 grm. platinum. 



III. 0*5078 grm. gave 0*1555 grm. platinum. 



Experiment. Theory, 



I. II. III. (C 10 H 13 )"',C 4 H 5 ,NCl,PtCl a . 



Platinum 30*73 30*69 30*62 30*79 



When cespitine is acted on by iodide of amyle, a yellow un- 

 crystallizable gummy mass is obtained, the iodide of amyl- 

 cespityl-ammonium (C^H^^C 10 !! 11 ^ Cl,PtCl 2 , very dif- 

 ferent from the isomeric body, the crystalline iodide of diamyl- 

 ammonium, produced by the action of iodide of amyle on 



