CHEMISTRY. HOI 



of J hodizonic acid, carboxylic acid, and dioxydichiuoyl. When C'O com- 

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

 I 



C— OK 



/ '■' 

 KO— C C— OK 



II I 

 KO— C C— OK 



HexaoxybeDzene-pofcassium. 

 Partial oxidation of this substance yields — 



C— O 



KO— C 



C— O 



0-i><i-OK 



\ 1/ 

 C— O 



Rbodizonate of potassium or potassium dioxydicliinoyl. 



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



Organo-Silivium Cofnpounds in the Aromatic Series (by A. Polis). — 

 Followiuo- the method devised by A. Michaelis in the preparation of the 

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

 eral siliciuni compounds in the aromatic series. Siliciumtetraphenyl, 

 Si ((.'6135)4, is obtained by the action of one molecule of siliciumtetra- 

 chloride on four molecules of chlorbenzene in the j)resence of sodium 

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

 line powder, melting at 228°, little soluble in ether and in alcohol, 

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

 air, it burns, giving out flocks of silici(; anhydride. 



By similar ijrocesses the author obtained paiasiliciumtetratolyl, 

 Si (CGHiCHa)^, also melting at 22-80; siliciumtetrabeuzyl, Si (CH2U6H5)4, 

 which melts at 127.5°. Both of these bodies form (;ok)rIess crystals 

 having properties similar to siliciumtetraphenyl.- [Ber. d. d. chem. <re,v., 

 xviu, 1540.) 



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

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

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

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

 and ceased after several hours. The simple liquid thus ol)tained was 

 distilled, and the fraction, boiling at 420°, yielded, 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,,TIr,)|SiO^, 

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

 4C6H5OH-|-SiCl4=4H01+(<J6H5)4SiO4 



