Abstract
A new mixed ligand copper(II) complex, [Cu(2,4-pydc)(pic)(H(2)O)]∙H(2)O (1) (where 2,4-pydc = pyridine-2,4-dicarboxylate, pic = 2-picolylamine) has been synthesized and characterized by elemental analysis, FT-IR and UV-Vis spectroscopic and thermogravimetric methods. Single crystal X-ray diffraction analysis reveals that copper(II) atom in the title complex adopts distorted square pyramidal geometry. Structural characterization also reveals that interplay of O-H···O, N-H···O, C-H···O, and C-H···π interactions between lattice and coordinated water and ligands significantly contribute to the crystal packing leading to the formation and strengthening of three dimensional supramolecular assembly. Hirshfeld surface analysis employing 3D molecular surface contours and 2D fingerprint plots have been used to analyze intermolecular interactions present in the solid state of the crystal.
Highlights
Metal-organic coordination compounds based on aromatic multicaboxylic acid have been studied extensively due to their interesting geometrical and topological features along with their potential applications in many areas including gas storage, separation, catalysis, magnetism and optics.[1]
The observed position of υ−str(O–H) vibration indicates that lattice and coordinated water molecules are involved in hydrogen bonding which is confirmed by X-ray structure determination of the complex
In this paper we have reported the synthesis, characterization and crystal structure of a new coordination complex of copper(II) incorporating pyridine-2,4-dicarboxylate and 2-picolylamine
Summary
Metal-organic coordination compounds based on aromatic multicaboxylic acid have been studied extensively due to their interesting geometrical and topological features along with their potential applications in many areas including gas storage, separation, catalysis, magnetism and optics.[1] The nature of the metal ions, selection of the appropriate aromatic multicarboxylic acid, and modulation of the reaction conditions are the important factors to achieve a desire target compound with specified physical properties.[2] Among various aromatic multicarboxylic acids, the class constituting N-heterocyclic multicarboxylic acids such as pyridine-, pyrazine-, and pyrazole-polycarboxylic acids and/or their derivatives[3,4,5,6,7,8,9,10,11,12] have been extensively employed for their simultaneous chelating capability and diverse coordination abilities In this regard, pyridine-2,4-dicarboxylate ligand demands special attention for both the carboxylate group and nitrogen atom and for not providing steric hindrance, which makes it versatile for the formation of novel metal-organic frameworks.[1] the introduction of nitrogen-containing neutral organic spacers containing two or more pyridyl groups separated by rigid or flexible spacers, such as 4,4'-bipyridine, 1,2-bis(4'-pyridyl)ethane/ethene, 1,2-bis(4'-pyridyl)propane etc. Hirshfeld surface analysis is used to analyze the intermolecular interactions present in the solid state of the compound
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