Hydrogen-bonded copper(II) and nickel(II) complexes and coordination polymeric structures containing reduced Schiff base ligands |
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| Authors: | Bellam Sreenivasulu |
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| Institution: | Department of Chemistry, 3 Science Drive 3, National University of Singapore, Singapore 117543, Singapore |
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| Abstract: | Complexes Cu(HSas)(H2O)] · 2H2O (H3Sas = N-(2-hydroxybenzyl)-l-aspartic acid) (1), Cu(HMeSglu)(H2O)] · 2H2O (H3MeSglu = (N-(2-hydroxy-5-methylbenzyl)-l-glutamic acid) (2), Cu2(Smet)2] (H2Smet = (N-(2-hydroxybenzyl)-l-methionine) (3), Ni(HSas)(H2O)] (4), Ni2(Smet)2(H2O)2] (5), and Ni(HSapg)2] (H2Sapg = (N-(2-hydroxybenzyl)-l-aspargine) (6) have been synthesized and characterized by chemical and spectroscopic methods. Structural determination by single crystal X-ray diffraction studies revealed 1D coordination polymeric structures in 2 and 4, and hydrogen-bonded network structure in 5 and 6. In contrast to previously reported coordination compounds with similar ligands, the phenol remains protonated and bonded to the metal ions in 2 and 4, and also probably in 1. However, the phenolic group is non-bonded in 6. |
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| Keywords: | Reduced Schiff base Tridentate ligand Copper(II) complex Ni(II) complex Hydrogen-bonded supramolecular networks Coordination polymers |
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