Synthesis and Spectroscopic Characterization of a Novel Coordination Polymer of Palladium(II) with Pyrazole and Azido Ligands
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2002-01-01
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De Godoy Netto, Adelino Vieira [UNESP]
Frem, Regina Célia Galvão [UNESP]
Mauro, Antonio Eduardo [UNESP]
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The one-dimensional coordination polymer of palladium(II) with pyrazolato (Pz −) and azide (N 3 −) as bridging ligands, of formula [Pd 3 (µ-N 3)(µ-Pz) 5] n, has been prepared. From IR and Raman studies it was evidenced the exobidentate nature of pyrazole ligands as well the µ-1, 1-bridging coordination of azido groups. NMR experiments showed two sets of broadened signals with different intensities indicating the presence of pyrazolato groups in distinct chemical environments. The proposed structure of [Pd 3 (µ-N 3)(µ-Pz) 5] n consisting of a zigzag ribbon in which each (Pz) 2 Pd(Pz) 2 entity is bound to two stacked planar units [Pd(µ-Pz)(µ-N 3)Pd core] with very weak Pd-Pd interaction, based on UV-Vis spectroscopy.
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Molecular Crystals and Liquid Crystals, v. 374, n. 1, p. 255-260, 2002.