ORGANO-METALLIC DERIVATIVES OF CHROMIUM, TUNGSTEN AND IRON. 101 



divided into two equal portions. The first was at once 

 decomposed with water and acid and gave 0*6 grams of 

 diphenyl. The second was treated with 5 grams of ferric 

 chloride and gave 4 grams of diphenyl, so that evidently 

 the majority of the initially-formed iron organo-compound 

 remained in the ethereal solution as such. 



An attempt was made to isolate an iron organo-compound: 

 the reaction mixture from phenyl magnesium bromide and 

 ferric chloride in ether was treated with water and dilute 

 sulphuric acid and the ethereal solution separated, dried, 

 filtered and evaporated. The dark coloured solid residue 

 so obtained was freed from diphenyl by extraction with 

 light petroleum, when an ochre-coloured solid was obtained. 

 This was washed with water, dried, dissolved in benzene 

 and precipitated by the addition of light petroleum. A 

 greenish solid resulted, which contained iron, was soluble 

 in benzene and depressed the melting point of diphenyl. 



Oddo, who has investigated the subject from a different 

 point of view 1 apparently failed to isolate a solid phenylated 

 iron compound, although his conclusions are in substantial 

 agreement with those now put forward. 



In the interaction of tungsten chlorides with Grignard 

 reagents, organo-metallic compounds seem to be produced 

 as unstable intermediate products, all attempts to isolate 

 them, however, having at present met with no success. 



Gazz. chim. ital., 1914, 44, ii, 268. 



