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1‐Lithio‐2,2‐diphenyl‐1‐(phenylsulfonyl)ethen: Synthese und Kristallstruktur
Author(s) -
Müller Jürgen,
Neuburger Markus,
Zehnder Margareta
Publication year - 1995
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19950780308
Subject(s) - tetramethylethylenediamine , chemistry , crystal structure , dimer , sulfonyl , ring (chemistry) , ligand (biochemistry) , crystallography , medicinal chemistry , stereochemistry , sulfone , polymer chemistry , organic chemistry , biochemistry , alkyl , receptor
Syntheses and Crystal Structure of 1‐Lithio‐2,2‐diphenyl‐1‐(phenylsulfonyl)ethene Crystals of [1‐lithio‐2,2‐diphenyl‐1‐(phenylsulfonyl)ethene]– N , N , N′ , N′ ‐tetramethylethylenediamine (2/2) ( 2 ) were prepared by addition of BuLi to 1,1‐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 (LiOSO) 2 ring. There are no Li–C contacts to the C(α) atoms. Both Li cations are tetracoordinated via the sulfonyl O‐atoms and the N‐atoms of the TMEDA ligand. The X‐ray structure analysis of 1,1‐diphenyl‐2‐(phenylsulfonyl)ethene ( 1 ) also was determined to compare interatomic distances and angles.