8 Proceedings of the Royal Irish Academy. 



Cirmamyl-isobutyryl-methane crystallizes in thin plates showing straight 

 extinction, and therefore probably rhombic crystals, the angles between the 

 pyramid faces being ±93°, and between the pyramid faces and prism ±137°. 

 The crystals are very soluble in alcohol, less so in ether, and almost insoluble 

 in ligroin. Its alcoholic solution yields no colouration with ferric chloride, 

 nor are the crystals coloured by concentrated sulphuric acid, though they 

 dissolve in it to a colourless solution. 



Mdhyl-cinnamyl-acetyl-methane, CHjCH : CH . CO . CHl'Ei . CO . CH 3 . 



One gramme of sodium was dissolved in ethyl alcohol, and in this solution 



9 grammes of cinnamyl-acetyl-methane were dissolved An excess of methyl 

 iodide was then added, and the mixture was boiled until the alkaline reaction 

 had completely disappeared. The alcohol was removed and the residue 

 treated with water and ether. The ethereal solution was washed with a little 

 dilute potash, and then with a little dilute acid. TVhen the ether had been 

 distilled, the residue was recrystallized from alcohol or from petroleum ether, 

 the yield being about 5 grammes. M. P. S8-S9 : C. 



0-1786 substance gave 0-5060 CO, and 0-1129 H,0, 



corresponding to C 772 H 6 - 9. 



C 13 H I4 2 requires C 772 H 70. 



Methyl-cinnamyl acetyl-methane crystallizes in long needles of a light 

 yellow colour. It is soluble in dilute potash as well as in the usual organic 

 solvents. Its alcoholic solution yields a dark brown colouration with ferric 

 chloride. In concentrated sulphuric acid the crystals turn red, and dissolve 

 rapidly to a yellow solution. It colours wool mordanted with iron a weak 

 brown. 



