The structure [Mn III TPP][Me 2 DCNQI] (TPP = tetraphenylporphinato; Me 2 DCNQI = 2,5-dimethyl-N,N′dicyanoquinone-diimine) has been determined from X-ray powder diffraction data. The nonsolvated structure is composed of linear (1-D) chains of alternating [Mn III TPP] + and µ-[Me 2 DCNQI] • with intrachain Mn•••Mn separations of 12.83 Å, and a MnN DCNQI distance of 2.18 Å. The dihedral angle between the mean Mn(N 4) TPP and [Me 2 DCNQI] •planes, and the Mn(NC) DCNQI angle are 84.18° and 143.6°, respectively. [Mn III TPP][Me 2 DCNQI] has a T c of 4.3 K from the 10 Hz "(T) data, 2-K coercivity of 5,600 Oe, and 6,300 emuOe/mol remnant magnetization that are reduced from that observed for related materials, and their inclusion extends the magnetostructural correlation between the intrachain coupling and both the dihedral angle between the mean Mn(N 4) TPP and [TCNE] •-(TCNE = tetracyanoethylene) planes and Mn(NC) TCNE angles. This is in accord with the intrachain coupling arising from the overlap of the Mn III d z 2-like singly occupied molecular orbital (SOMO) and the z component of the [TCNE] •-* ( z *) SOMO, which increases with decreasing dihedral angle between the mean Mn(N 4) TPP and [TCNE] •planes and Mn(NC) TCNE angle.
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