Home Physical Sciences New Dinuclear Mn(II) Phenanthroline Adipato Complex: Synthesis and Structural and Thermal Characterization of Mn2(phen)2(H2O)2(C6H8O4)2
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New Dinuclear Mn(II) Phenanthroline Adipato Complex: Synthesis and Structural and Thermal Characterization of Mn2(phen)2(H2O)2(C6H8O4)2

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Published/Copyright: June 2, 2014
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Reaction of freshly precipitated Mn(OH)2−2x(CO3)x · yH2O, adipic acid and phenanthroline in CH3OH/H2O afforded a new dinuclear Mn(II) complex, Mn2(phen)2(H2O)2(C6H8O4)2 1, aside the known [Mn(phen)2(H2O)(C6H8O4)]·7H2O 2. Single crystal X-ray analyses showed that complex 1 consists of the centrosymmetric dinuclear molecules resulting from two [Mn(phen)(H2O)]2+ moities bridged by two twisted tridentate adipato ligands. The Mn atoms are each in severely distorted octahedral geometry defined by two N atoms of one phen ligand, three carboxyl O atoms of two adipato ligands and one H2O molecule with d(Mn-N) = 2.246 and 2.296 Å and d(Mn-O) = 2.066 - 2.339 Å . The complex molecules are assembled via π-π stacking interactions into 2D layers, which are held together by both strong O-H ··· O and weak C- H ··· O hydrogen bonds. The thermal behavior of 1 and 2 upon heating in argon stream is discussed.

Received: 2002-10-5
Published Online: 2014-6-2
Published in Print: 2003-4-1

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