Macrotricyclic Quaternary Ammonium Salts: Enzyme-Analogous Activity

✍ Scribed by Dr. Franz P. Schmidtchen

• Publisher: John Wiley and Sons
• Year: 1981
• Tongue: English
• Weight: 326 KB
• Volume: 20
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.198104662

✦ Synopsis

close to zero in (1) but strongly negative in (2). By integration, the electron-density deficit on the Li atom in ( ) is estimated to be about 0.5-0.6 electrons. Thus, from the electron-density difference maps, 2-lithio-2-methyldithiane would seem to have a covalent, at most polarized, Li-C bond, whereas 2-lithio-2-phenyldithiane can be regarded as an example of a contact ion-pair complex.