on the Physical Properties of Compounds. 117 



II. 



Dimethyl benzene. 



Ethyl benzene. 





CH, 







CH 3 







CH 3 





1.3 







1.2 



CH, 



CHj 



' 



V 



CH 3 





\y 







\J 



below —22. Liquid. 



Durene. 

 CH 3 CH 3 



III. 



1.4 Diethyl 

 benzene. Isodurene. 



C,H, 



CH3 CH 3 



rn.p. =80. 



Methylpropyl benzene 



CH 



C 2 H 5 I CH 3 



Liquid. Liquid 



Dimetbylethyl 

 benzene. 



C 6 H 3 .(OH 3 ) 2 .C a H s 



CH 3 







CH 3 



A 



1 2 



C 3 H 7 





CH 3 



A 



1 3 





1.4 

 C 3 H 7 







\y 







\y 



C 3 H 7 



Liquid. 



Metbylisopropyl 

 benzene. 



C 5 H 4 .CH 3 .CH(CH 3 ) 2 



Liquid. Liquid. Liquid. Liquid. 



Normal butyl benzene. Isobutyl benzene. 



CH 2 .CH 2 .CH 2 .CH 3 

 Liquid. 



CH 2 .CH 

 Liquid. 



CH, 



\CH, 



