57Fe NMR spectroscopy of ferrocenes bearing π-acceptor substituents

✍ Scribed by Bernd Wrackmeyer; Oleg L. Tok; Anahid Ayazi; Heidi E. Maisel; Max Herberhold

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 108 KB
• Volume: 42
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.1401

✦ Synopsis

Abstract

Ferrocene derivatives bearing π‐acceptor substituents in 1‐ or 1,1^′^‐positions such as carbonyl group(s) (1, 2), a sulfinyl group (4) or boryl group(s) (5, 6, 9) and related [3]ferrocenophanes (3, 7, 10, 12, 13) and a [4]ferrocenophane (8) were studied by ^57^Fe NMR spectroscopy. The deshielding effect of the respective π‐acceptor substituent can be partially or fully compensated by distortion of the ferrocene geometry. Both aspects become apparent by comparing δ^57^Fe data of the [n]ferrocenophanes with those of related non‐cyclic derivatives. Copyright © 2004 John Wiley & Sons, Ltd.