Note on the Specific volumes of Aromatic 

 Compounds. 



By 

 Jöji Sakurai, FCS. 



Profpssov of Cliomistry, Impovial University. 



It is well known tliat the o1)serve<l specific volumes of henzene 

 and its derivntives-' are less tlinn those coleulated with the use of Ko}»])'s 

 constants which, wiicu applied to saturated f:itty compounds, give 

 results fairly agreeing- with the oliserved values. 



OtluT values for earhon and hydrogen to be applied to 1)enzene 

 (and its derivati\'es ?) have therefore been calculated. Lother Clever 

 regards the hvdrogen of benzene as liaving the \ alue 5,* instead of o.ö, 

 while the carbon is regarded as lia\'ing the value 1 1 , as in saturated 

 fatty compounds. J,i"isclnnidt assinnes that half the carbon atoms 

 in benzene have the value 11, and the remainder the value 14, and 

 that hydrogen has the constant value 3.5. 



Each of these sets of values, I considei', has been arbitrarily 

 deduccil from the observed specific volume of benzene, and therefore, 

 when calculated back, thev naturallv i^ive results asTceina" with 

 the latter. 



* I have not been able to refer to Meyer's original paper. Thorpe (J. chem. Soc. Trans. 



1880,.3S1) states: "Lother Meyer makes H=3 ," Init this I regard as amisprint for H = 5. 



This misprint is reproduce;! in Watt's Diet. Ill Suppl. p. 212G, and again in Mr, Kuhara's 

 paper to ho referred to later on. 



