89 



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

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

 formation of monochlorbenzene. 



(C, H,), Hg+Te C\.--2L\ H, Cl+Hg Te. 



From this change I was led to expect the formation of the desired liody, 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, Hs) Hg^-Te,=Ce H^ 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 COj gas, 4-5 hours, 

 at a temperature of 200° Cent., there results a grayish Itlack 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. Xoyes. 



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 

 the«-brom derivative has been prepared. This, on treatment with alcoh( lie potash 

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

 union in the latter is in the 3 position. 



rCH3 1. 



Xvlvllic acid, Cg Hj ■{ CHj 3. has been reduced bv means of amvl alcohol 

 i CO 2 H 4. 



and sodium and the «-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, ,'. 543. 



