CHEMISTRY. HGl 



of ihodizouic acid, carboxylic acid, aud dioxydicbiiioyl. When CO com- 

 bines with K it forms C — OK, and six of these groups combine to form — 



I 



C— OK 



/ -^^ 

 KO— C C— OK 



li I 

 KO— C C— OK 



\ ^ 

 C— OK 



Hexaoxybenzene-pofcasaium. 



Partial oxidation of this substance yields — 



C— O 



KO— C 



\ 

 C— O 



c— o 



C— OK 



Ehodizonate of potassium or potassium dioxydicliinoyl. 



{Ber. d. chem. Ges., xviii, 499 and 1833.) 



OrganoSilicium Compounds in the Aromatic Series (by A. Polls). — 

 Follov<iug the method devised by A. Michaelisin the preparation of the 

 aromatic phosphiues, arsines, and stibines, the author has made sev- 

 eral siliciuni compounds in the aromatic series. Siliciumtetrai)henyi, 

 Si ((.'635)4, is obtained by the action of one molecule of siliciurntetra- 

 chloride ou four molecules of chlorbenzeue in the i)resence of sodium 

 and of absolute ether. The pnrified product forms a colorless crystal- 

 line powder, melting" at 2i\SO, little soluble in ether and in alcohol, 

 easily sohible in chloroform and hot benzene. Heated with access of 

 air, it burns, giving out flocks of silicic anhydride. 



By similar processes the author obtained i)aia siliciumtetratolyl, 

 Si (CeH4Cn3) 4, also melting at 22<SO; siliciumtetrabenzyl, Si (OH2(J6H5)4, 

 which melts at 127.5°. Both of these bodies form colorless crystals 

 having properties similar to siliciumtetrapheuyl. (Ber. d. d. chem. Ges., 

 xviu, luJbO.) 



Silicates of the Phenols (by J. Hertkorn). — Pure crystalline phenol 

 (boiling at 182-183°) was gently melted and treated with cliloride of 

 siliciura, the former being in excess; the temperature of the mixture 

 was gradually raised to 220° to 225°; hydrochloric acid gas was evolved, 

 aud ceased after several hours. The simjile liquid thus obtained was 

 distilled, aud the fraction, boiling at 420°, yielde<l, on cooling, long col- 

 orless prisms. The purified crystals, carefully dried, melted at 47° to 

 48°. Analysis showed the body to have the composition (C,;n5)|SiO„ 

 tetraphenyl silicate, and was formed as shown in the equation : 

 4C6H50H + SiCl4=4HCl-f(C6H5),Si04 



