Unit-Stere Theory of Molecular Volu 



me. 



603 



Hydrocarbon. 



y. v. 



\ 



M 

 W* 



2 



2-142 



2-20 



2-23 



2-25 



2-26 



2-27 



2-28 



2-285 



2-290 



2294 



2-297 



2-300 



2-302 



2304 



2-306 



V 



^ = Le Bas' stere.i 



CH\ 



58*4 9 '40 



4-82 

 4-03 

 3-50 

 3-58 

 3-68 

 3-57 

 369 

 3-64 

 3-52 

 3'55 

 356 

 3-56 

 3-55 

 3-59 

 3 60 

 3-60 





56-5 

 74-8 

 960 

 117-8 

 139-93 

 162-56 

 182-26 

 197-1 

 220-2 

 241-9 

 263-9 

 284-4 

 308-8 

 333-0 

 353-3 



1-88 



1-70 



1-60 



1-592 



1-590 



1-593 



1-605 



1-540 



1-550 



1-550 



1-534 



1-545 



1-557 



1-570 



1-563 



3 H 8 



Sh;: :::::::::::: 







C 8 H 18 



*C q H on 



C 10 H 22 



C 1Q H 0f 



CH,, 





C n . H,, 



C lf .H " 





# The molecular volumes of hydrocarbons C 9 H 20 , &c. are due to Bartoli and 

 Stracciati, the substances being mixtures of isomers. 



The true reason for the discrepancy has not been perceived 

 by Le Bas, for it is obvious that the specific volumes are 



M 



decreasing in magnitude, whereas the ratio -ttt is increasing, 



so that there must come a place in the series where the 

 product has a minimum value. 



If we calculate the value for the Le Bas'' stere for other 

 classes of compounds where the molecular weight of the 

 first member is fairly large, then it will follow that the 



M 



factor yrz will vary more than the specific volumes, and 



consequently the variation in the value of the Le Bas' stere 



M 

 will be due chiefly to the variation of the quantity ^ which 



does not involve volume. This is seen from the table below, 

 in which are given the molecular volumes of the aliphatic 

 iodides. 











M 



Mv V 





W. 



V. 



v. 



W* 



w ov w 



CH 3 I 



8 



660 



•465 



17-75 



8-25 



C.H.I 



14 



85-8 



•55 



11-14 



6-128 



C 3 H T I 



20 



1069 



•628 



8-5 



5-345 



C,H I 



26 



128-2 



•696 



7-07 



4-93 



C,H U I ... 



32 



150-4 



•759 



6-25 



4-70 



Q e H l3 I ... 



38 



173-8 



•819 



56 



4-573 



C-H 15 I ... 



44 



198-6 



•878 



5-18 



4513 



C 8 H 17 I ... 



50 



222-6 



•927 



457 



445 



