Self-assembly of [M(Hida)2] (Hida−=iminodiacetate; M=Pd and Pt) in a 2D supramolecular network via extensive hydrogen bonded interactions: Synthesis, X-ray crystal structure, spectroscopic and thermal studies
作者:Jishnunil Chakraborty、Heike Mayer-Figge、William S. Sheldrick、Pradyot Banerjee
DOI:10.1016/j.poly.2004.09.033
日期:2005.5
Two hydrogen-bonded palladium(II) and platinum(II) complexes, [Pd(Hida)(2)] (1) and [Pt(Hida)(2)] (2) (Hida(-)= iminodiacetate), have been synthesized and characterized by single crystal X-ray diffraction analyses. Hida(-) serves as a bidentate ligand coordinating to both Pd(II) and Pt(II) through its nitrogen and oxygen atom, exhibiting a square planar geometry with a trans configuration. The uncoordinated carboxylic group and the imino group of the ligand are involved in strong intermolecular hydrogen bonding to form a two dimensional layered network in both the complexes. The network is propagated along the ac-plane and stacks orthogonally to the b-axis. The thermogravimetric analyses for complexes 1 and 2 reveal stepwise decomposition processes indicating the probable decarboxylation of the free and bonded carboxylates. As there are two types of hydrogen bonding (N-(HO)-O-..., O-(HO)-O-...) present in both the complexes, two endothermic peaks regarding heat change are evident from their DSC diagrams. (c) 2005 Elsevier Ltd. All rights reserved.