Synthese von Cp(CO) 2 MnTCNE aus [Cp(CO) 2MnXPh] n (X = S, Se, Te; n = 1,2); Festkörperstruktur und Magnetismus

Abstract

Cp(CO) 2MnTCNE ( 1) which was first reported by M. Herberhold et al., has been obtained from the reaction of [Cp(CO) 2MnXPh] n (X = S, n = 1; X = Se, Te, n = 2) with TCNE. The synthesis of the relevant organometallic sulfur, selenium and tellurium derivatives is described. An X-ray diffraction study of the TCNE compound reveals that two Cp(CO) 2MnNCC(CN)C(CN) 2 ( 1) molecules form centrosymmetric dimers containing a coordinated centrosymmetric (TCNE) 2 x− pair. The bond lenghts, the v(CN) spectra and a solid state magnetism of μ eff = 1.1 μ B (293 K) are all consistent with this structural finding.