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Two new supramolecular architectures of singly phenoxo-bridged copper(II) and doubly phenoxo-bridged manganese(II) complexes derived from an unusual ONOO donor hydrazone ligand: syntheses, structural variations, cryomagnetic, DFT, and EPR studies

Ray, Aurkie and Rizzoli, Corrado and Pilet, Guillaume and Desplanches, Cédric and Garribba, Eugenio and Rentschler, Eva and Mitra, Samiran (2009) Two new supramolecular architectures of singly phenoxo-bridged copper(II) and doubly phenoxo-bridged manganese(II) complexes derived from an unusual ONOO donor hydrazone ligand: syntheses, structural variations, cryomagnetic, DFT, and EPR studies. European Journal of Inorganic Chemistry, Vol. 2009 (20), p. 2915-2928. eISSN 1099-0682. Article.

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DOI: 10.1002/ejic.200900188

Abstract

Two new coordination complexes {[(L)Cu2(µ-L)(NO3)(CH3OH)0.3(H2O)0.7]•NO3}[Cu(µ-L)(NO3)(CH3OH)] (1) and [Mn2 (µ-L)2 (H2O)(µ1-N3)2 (CH3OH)] (2) derived from (E)-N -(2-hydroxy-3-methoxybenzylidene)acetohydrazide [LH] have been synthesized. The new potentially tetradentate ONOO donor hydrazone ligand [LH] has shown considerable metal ion selective phenoxo bridging in 1 and 2. It has coordinated copper(II) ions in its tridentate as well as in tetradentate fashion whereas for manganese(II) ions it solely showed its tetradentate character. In 1 the two adjacent pentacoordinate copper(II) centers are connected by a rare single phenoxo linkage of the hydrazone ligand whereas 2 is a doubly phenoxo-bridged heptacoordinated manganese(II) dinuclear species. The 3D supramolecular networks of 1 and 2 have resulted from extensive H-bonding interactions in the respective complexes. Structural variations observed for 1 and 2 have been described by performing single-crystal X-ray analysis. The ligand and the complexes are characterized by elemental analyses, IR, UV/Vis and 1H NMR spectroscopy. Cryomagnetic investigations, DFT studies and EPR analysis, of 1 and 2 have also been studied in detail.

Item Type:Article
ID Code:3527
Status:Published
Refereed:Yes
Uncontrolled Keywords:Supramolecular chemistry, structure elucidation, density functional calculations, N,O ligands, hydrogen bonds, bridging ligands
Subjects:Area 03 - Scienze chimiche > CHIM/03 Chimica generale e inorganica
Divisions:001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:Wiley
eISSN:1099-0682
Deposited On:25 Jan 2010 15:44

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