Spectroscopic and structural studies of the 2D Mn(II) coordination polymer from a bridging Noxa, Npy bidentate ligand; tetra-n-butylammonium[5-(3-pyridyl)-1,3,4-oxadiazole-2-thiolate]

A coordination polymer ([Mn(3-pyt)(2)(H2O)(2)][N(n-Bu)(4)](+)[3-pyt](-)}(n) (3) has been synthesized from the reaction of tetra-n-butylammonium[5-(3-pyridyl)-1,3,4-oxadiazole-2-thiolate] {[N(n-Bu)(4)](+)[3-pyt](-)} and Mn(OAc)(2) center dot 4H(2)O. The ligand and the Mn(II) complex 3 have been characterized by elemental analyses, IR, H-1 and C-13 NMR spectroscopy, in addition 3 has also been studied crystallographically. The single crystal X-ray structure of the 3 shows that the ligand is bonded to Mn(II) via its pyridyl and oxadiazole nitrogen atoms. This bonding pattern connects the Mn(II) centres to afford an uniform two dimensional coordination frame work where the [Mn(3-pyt)(2)(H2O)(2)](n) molecules are stacked in a parallel layers. The overall arrangement of molecules in crystal lattice results in open channels in which the enclosed tetra-n-butylammonium cations are stabilized by anionic oxadiazole molecules through N+center dot center dot center dot S- ionic interactions. (C) 2008 Elsevier Ltd. All rights reserved.