242 Proceedings of the Royal Irish Academy. 



Diphenyl-pentadecyl carbinol was obtained as a nearly colourless solid 

 crystallizing in prisms from petroleum ether, in which mediimi it was very 

 soluble. It also dissolved readily in ether, chloroform, benzene, and acetone, 

 but was not very soluble in cold alcohol. It melted at 47-48° C. 



Diraethyl-Heptadecyl CarhinoL — 3 grammes of magnesium, 23 grammes of 

 methyl iodide, 50 c.c. of ether, and 15 grammes of methyl stearate gave 

 10-5 grammes of tertiary alcohol. 



0"212 gramme of the compound gave 0'626 gramme of COo and 0-268 

 gramme of HjO, corresponding to carbon, 80'53 per cent. ; hydrogen, 

 14'14 per cent. 



C20H12O requires : carbon, 80*44 per cent. ; hydrogen, 14-19 per cent. 



Dimethyl-heptadecyl carbinol crystallizes from petroleum ether in needles. 

 It dissolves easily in ether, benzene, and chloroform. It melts at 44-45° C. 



Diethyl- Heptadecyl Carbinol crystallizes from alcohol in clusters of needles 

 and melts at 44-45° C. It is easily soluble in benzene, chloroform, ether, and 

 petroleum ether. 



0-1889 gramme of the compound gave 0-5596 gramme to CO2 and 0-2388 

 gramme of HjO, corresponding to carbon, 80-79 per cent. ; hydrogen, 

 14-146 per cent. 



C22H46O requires : carbon, 80-89 per cent. ; hydrogen, 14-2 per cent. 



Di^p'ropyl-IIeptadecyl Carhinol. — 3 grammes of magnesium, 7 grammes of 

 N-propyl iodide, 50 c.c. of ether, and 15 grammes of methyl stearate gave 

 8-5 grammes of tertiary alcohol. 



0-2325 gramme gave 0-2931 gramme of H2O and 0-6975 gramme of 

 CO2, corresponding to carbon, 81-8 per cent. ; hydrogen, 14-008 per 

 cent. 



CaiHsoO requires : carbon, 81-261 per cent. ; hydrogen, 14-2 per cent. 



The compound crystalhzed in needles, and melted at 28-30° C. 



Bifhenyl-Heptadecyl Carhinol. — The details of the preparation of this com- 

 pound are similar to those of the corresponding pentadecyl alcohol. The 

 alcohol melted at 58° 0., and erystalUzed from alcohol in long curved needles. 

 It is easily soluble in petroleum ether, and very soluble in chloroform, acetone, 

 and benzene. 



0-2146 gramme gave 0-207 gramme of H2O and 06692 gramme of CO2, 



corresponding to hydrogen, 10-8 per cent. ; carbon, 85-04 per cent. 

 CmH^sO requires : hydrogen, 10'98 per cent. ; carbon, 85-23 per cent. 



