DTA Studies on Formation of Dehydrobenzene and Dichlorocarbene from Haloorganolithium Compounds

✍ Scribed by Prof. Dr. Oleg M. Nefedov; Andrej I. Dyachenko

• Publisher: John Wiley and Sons
• Year: 1972
• Tongue: English
• Weight: 192 KB
• Volume: 11
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.197205071

✦ Synopsis

In the present communication we report differential thermal analysis (DTA)"] studies on the decomposition of o-halophenyllithiums, o-XC,H,Li ( I ) and trichloromethyllithium ( 2 j f 3 -' ] in the presence of ethers and amines. Compounds ( I ) and (2) were obtained by the addition of 1.0-10ml of a 1 . 0 ~ solution of o-XC,H,Br

(X=F, C1, Br) or C1,CX' (X'=H, Br) in isopentane or npentane to an equal volume of 1.0 N n-C,H,Li in the same solvent at -150°C. The mixture was then allowed to warm to room temperature ( z l h) in a DTA instrument. The results are shown in Table . Independent experiments have shown that the observed exothermic effects are due to the decomposition of ( I ) or ( )16].