A carbon-13 nuclear magnetic resonance study of (arene)(cyclopentadienyl)iron salts

Abstract

Carbon-13 n.m.r. data are presented for the complexes [Fe(η-C₅H₅)(η-C₆H₅X)][PF₆] where X is one of 17 substituents. The results are discussed in terms of current theories and are compared with data for other related transition-metal systems. The chemical shifts are qualitatively interpreted by consideration of the ligand–metal interactions. Spectral data are also given for 17 polysubstituted arene complexes of the type [Fe(η-C₅H₅)(η-arene)][PF₆].