102 Proceedings of the Itoi/al Jri.fh Acadcm/j, 



is readily soluble in cold ether, chloroform, or benzene. It is soluble iu cold 

 acetone or petroleum ether, and almost insoluble in cold alcohol, but dissolves 

 readily in these solvents on vrarming. It crystallises from alcohol and acetone 

 in curved needles. 



Di-p-tolyl-lieptacosijl carhinol, CjiHss— C . OH. 

 CcHiCHj/ 



The crude, waxy product resulting from the action of 6 grms. of ethyl 

 montanate on the " Grignard " reagent obtained from 0'81 grm. of magnesium 

 and 5'67 grms. of p-bromotoluene, was subjected to a steam distillation to 

 free it from bromotoluene and di-tolyl. The residue was dissolved in 

 chloroform, the solution dried over calcium chloride, and the chloroform 

 evaporated off. The residual wax melted at 47° C, and was found to 

 absorb bromine. It therefore seemed probable that it was an unsaturated 

 hydrocarbon. 



0'194 grm. of this compound gave 0-6223 grm. of CO2, and 0'2136 grm. of 

 H2O, corresponding to carbon, S7'48 per cent., and hydrogen, 12'23 per cent. 



The composition of the unsaturated hydrocarbon C27H54 : C/p'-rT^rrrr^ 

 is : carbon, 87"77 per cent., and hydrogen, 12"23 per cent. 



The compound obtained in this preparation therefore appears to be above 

 unsaturated hydrocarbon The yield was 50 per cent. 



Another preparation was undertaken with 1-3 grms. of magnesium, 9'17, 

 grms. of p-bromotoluene, and 9 '7 grms. of ethyl montanate. The compound 

 obtained was repeatedly recrystallised from hot alcohol, and by this means 

 was separated into two portions. The part more soluble in alcohol (the 

 major portion) melted at about 47° C, and therefore appeared to be identical 

 with the hydrocarbon obtained in the first preparation. The remainder 

 consisted of a very small quantity of wax melting at from 51° to 52° C. 



0-1809 grm. of the latter portion gave 0-5655 grm. of CO,, and 0-1934 

 grm. of H2O, corresponding to carbon, 85-25 per cent., and hydrogen, 11-88 

 per cent. 



CjHioO requires carbon 85-42 per cent., hydrogen 11-86 per cent. 



Di-p-tolyl-heptacosyl carbinol is a white solid, crystallising in curved 

 needles, and resembling the di-phenyl compound in its solubilities. 



CioH,^ 

 Di-u-Ncqjhthyl-lieptacosyl carhinol, C27H55— C . OH. 



CioHt/ 



In this preparation the " Grignard " compound had to be heated for about 

 two hours before all the magnesium dissolved. 



