Tellurium tetrachloride: Addition to cyclohexene and preparation from tellurium dioxide and trimethylchlorosilane

✍ Scribed by Shin-Ichi Fukuzawa; Kurt J. Irgolic; Daniel H. O'Brien

• Book ID: 102234609
• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 420 KB
• Volume: 1
• Category: Article
• ISSN: 1042-7163
• DOI: 10.1002/hc.520010107

✦ Synopsis

Tellurium dioxide, trimethylchorosilane, acetyl chloride, or acetyl bromide in glacial acetic acid generated a homogeneous solution. Addition of cyclohexene produced trans-2-halocyclohexyl tellurium trihalides of excellent purity in 70% yield. With dichloromethane or ethanol-free chloroform the same compounds were obtained from heterogeneous reaction mixtures. trans-2-Methoxycyclohexyl tellurium trichloride was obtained quantitatively from tellurium dioxide, trimethylchlorosilane, and cyclohexene in absolute methanol. In the absence of cyclohexene, tellurium tetrachloride was obtained in 91% yield from tellurium dioxide and trimethylchlorosilane in chloroform, and tellurium tetrabromide in 98% yield from tellurium dioxide and acetyl bromide in glacial acetic acid.