57Fe NMR spectroscopy of ferrocenes bearing pi-acceptor substituents.
Ferrocene derivatives bearing pi-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 57Fe NMR spectroscopy. The deshielding effect of the respective pi-acceptor substituent can be partially or fully compensated by distortion of the ferrocene geometry. Both aspects become apparent by comparing delta57Fe data of the [n]ferrocenophanes with those of related non-cyclic derivatives.
Laboratorium für Anorganische Chemie der Universität Bayreuth, D-95440 Bayreuth, Germany. b.wrack@uni-bayreuth.de
Bernd
B
Wrackmeyer
Oleg L
OL
Tok
Anahid
A
Ayazi
Heidi E
HE
Maisel
Max
M
Herberhold
D005296:Ferrous Compounds / Q000032:analysis* / Q000737:chemistry*; D058085:Iron Compounds / Q000032:analysis / Q000737:chemistry*; D007503:Iron Isotopes / Q000032:analysis / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D000075163:Metallocenes; D008958:Models, Molecular; D008968:Molecular Conformation; D010084:Oxidation-Reduction
D005296:Ferrous Compounds; D058085:Iron Compounds; D007503:Iron Isotopes; D000075163:Metallocenes; C004998:ferrocene