16 ART. 4. — Y. SHIBATA : TUE GRIGNATÎD REAGENT. 



Summary. 



1^ In spite of the great analogy existing between o-phtlialic 

 acid and succinic acid, the action of the Grignard reagent upon 

 o-phthalic esters differs from that upon succinic esters in pro- 

 ducing derivatives of phthalide, instead of producing glycols. 



2° More frequently, the reaction between the Grignard reagent 

 and o-phthalic esters goes even one step further, with production 

 of the derivatives of phthalane. l:l-Dimethyl-3-methylene- 

 plithalane, l:l-diphenyl-o-phenylene-phthalane and l:l-dibenzyl- 

 3-benzal-phthalane have thus been obtained and described. 



3° Various space formulée proposed for benzene are discussed 

 from the point of view of the experimental results obtained in 

 this investigation, and it is shown that Graebe's model, which 

 represents Kekule's well known formula in space, accounts for 

 the facts in the most satisfactory manner. 



In conclusion, I desire to express my best thanks to 

 Professor Matsubara for his kind guidance and suggestions. 



The Chemical Institute of the College of Science, 

 Imperial University of Tokyo. 



