89' 



However, the reaction did not take place according to the above equation,, 

 but the tellurium and the mercury combined in the final reaction, with the 

 formation of monochlorbenzene. 



(Ce H,), Hg+Te Cl2-2Ce H, Cl+Hg Te. 



From ihis change I was led to expect the formation of the desired body, Di- 

 phenyltellurid, by the double decomposition of Diphenyl-mercury, by means of 

 metallic tellurium alone — and the expectation was happily confirmed by experi- 

 ment. 



(C,, H^) Hg^Te,=Ce n, Te C, H^+Hg Te. 



If tellurium and mercury-diphenyl in the proportions by weight indicated by 

 the equation be heated together in a sealed tube filled with CO2 gas, 4-5 hours, 

 at a temperature of 200° Cent., there results a grayish black crystalline mass, sat- 

 urated with a thick, heavy oil. 



This oil, by extraction with ether and purification by rectification, was found 

 to be Diphenyltellurid, 78 per cent, of the theoretical quantity. 



Thus I succeeded in preparing the, till then unknown, diphenyltellurid. 



The method is a general one. 



Dreher and Otto* studied the action of sulphur upon mercury-diphenyl and 

 were of the opinion that diphenyl-sulphide was formed only at a red heat. 



However, the corresponding sulphides and telsurides may be obtained with 

 the greatest ease by heating mercury-diphenyl with sulphur or selenium to 

 200° C. under the conditions given. 



Camphoric Acid. By W. A. Noyes. 



In a paper presented to the Academy last year two acids, which were called 



cis-campholytic acid and cis-transcampholytic acid were described. The cis- 



campholytic acid has now been reduced and a dihydro acid obtained from which 



thea-brom derivative has been prepared. This, on treatment with alcoh lie potash 



yields the cis-campholytic acid again, thus proving conclusively that the double 



union in the latter is in the ,3 position. 



fCHa 1. 

 Xylyllic acid, Cg H3 -( CH3 3. has been reduced by means of amyl alcohol 



CO 2 H 4. 



and sodium and the c-brom derivative of the hexahydro acid obtained, was pre- 

 pared. The latter, on treatment with alcoholic potash, does not give either of the 



* Berichte der Deutschen Chems., Gesell, 2. 543. 



