1090 



I I I I 

 C— CH— CH— C 



II II > 

 C— CH— CH— C 



CH3CH3 CHj CHj 

 or in connexion with the researches of Lebedev ^) on polymeric 

 hydrocarbons, like : 



CH, 



I CHj CHj CHj 

 C I I I 

 CH3-C^\C — C = CH 



I I 

 CH,— HC\/CH— CH, 



CH 



I 

 CH, 



In order to elucidate the structure we have already made a great 

 many experiments w Inch, however, have not yet led to definite results. 



If the hydrocarbon is treated with bromine there always takes 

 place, besides the addition, an evolution of hydrogen bromide even 

 in very strong dilution and cooling to — 40°, and we did not 

 succeed in isolating a well-defined compound. An effort was made 

 to reduce the dimeride with sodium and alcohol, but it did not take 

 up any hydrogen under those conditions. Reduction with hydrogen 

 under the influence of platinum or palladium was also applied by 

 us in vain, up to the present. 



Oxidation with potassium pei-manganate has also failed to lead to 

 positive conclusions. Ex})eriment& intended to attain the desired result 

 with ozone are in progress. 



Utrecht. Org. Chem. Lah. University. 



Chemistry. — "1:3:5 He.ratricne." By Prof. P. van Romburgh and 

 Dr. P. Muller. 



(Communicated in the meeting of March '^8, 1914). 



One of us (v. R.) prepared in 1905, \vith Mr. van Dorssen, 

 the above hydrocarbon by heating the formate of s-divinylglycol. 

 From this could be obtained by addition of bromine : 

 1. a dibromide CaHgBr2 that proved identical with the s-diviuyl- 

 ethylene bromide prepared by Grlner. ') 



1) Jomn. Ghem. Soc. 104 Abstr. 1285, (1913). 

 ^) Ann. d. Ghimie ot de phys. rG), 26, 367 (1892). 



