Syntheses, structures and magnetic properties of Mn(ii) dimers [CpMn(μ-X)]2 (Cp = C5H5; X = RNH, R1R2N, CCR)

Abstract

Manganocene, Cp₂Mn, has been employed as a precursor in the synthesis of a range of Mn(II) dimers of the type [CpMn(μ-X)]₂ [X = 8-NHC₉H₆N (1), N(Ph)(C₅H₄N) (2), N(4-EtC₆H₄)(C₅H₄N) (3) and CCPh (4)] as well as the bis-adduct [Cp₂Mn{HNC(NMe₂)₂}₂] (5). The solid-state structures of 1–5 are reported. Variable-temperature magnetic measurements have been used to assess the extent of Mn(μ-X)Mn communication within the dimers of 1–4 as a function of the bridging ligands (X).