1-Lithio-2,2-diphenyl-1-(phenylsulfonyl)ethen: Synthese und Kristallstruktur

✍ Scribed by Jürgen Müller; Markus Neuburger; Margareta Zehnder

• Book ID: 102255315
• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: German
• Weight: 243 KB
• Volume: 78
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.19950780308

✦ Synopsis

Syntheses and Crystal Structure of l-Lithio-2,2-diphenyI-l-(phenylsulfonyI)etheue

were prepared by addition of BuLi to 1,l -diphenyl-2-(phenylsulfonyl)ethene (1) in the presence of N,N,N',N'-tetramethylethylenediamine (TMEDA) at low temperature. The X-ray structure analysis shows a centrosymmetric dimer bridged over an eight-membered (Li-0-S-O), ring. There are no Li-C contacts to the C ( a ) atoms. Both Li cations are tetracoordinated via the sulfonyl 0-atoms and the N-atoms of the TMEDA ligand. The X-ray structure analysis of I, I-diphenyl-2-(phenylsulfonyl)ethene (1) also was determined to compare interatomic distances and angles.

') Der Einfachheit halber wurden die Atome van 1 und 2 gleich numeriert