High nuclearity molecular species exhibiting spin frustration: fusion of two MnIII4O2 butterfly complexes to yield an intermediate spin ground state MnIII7O4 complex

Abstract

The preparation and characterization of (NEt₄)[Mn₇O₄(OAc)₁₀(dbm)₄]·3CH₂Cl₂·2C₆H₁₄(1·3CH₂Cl₂·2C₆H₁₄)(H dbm = dibenzoylmethane)are reported; the Mn^III₇O₄ core of 1 consists of two Mn₄O₂ butterfly units fused together by sharing of one wing-tip manganese atom and it is shown using magnetization data that complex 1 has either an S= 3 or S= 4 ground state.