Seven Coordinated Metal Complexes derived from (3-Carboxymethoxy-Naphthalen-2-yloxy)-Acetic Acid and Coordination Polymers |
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| Authors: | Himangshu Deka Rupam Sarma and Jubaraj B Baruah |
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| Affiliation: | (1) Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781 039, Assam, India; |
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| Abstract: | A design principle for seven coordinated metal carboxylate complexes and coordination polymers of Mn(II), Cd(II) and Na(I)
derived from (3-carboxymethoxy-naphthalen-2-yloxy)-acetic acid (LH2) is presented. The complexes/coordination polymer Mn(L)(H2O)3]·3H2O (1), {Cd(L)(H2O)2}·H2O]n (2); Cd(L)(py)3]·3H2O (3) have metal ions in pentagonal bipyramid environments (py = pyridine). The coordination polymer {Cd(L)(H2O)2}·H2O]n (2) may be considered to be the self-assembly of hexacoordinated Cd(L)(H2O)2] units; it reacts with pyridine to form mono-nuclear complex 3. Depending on the reaction conditions, Ni-coordination polymers of L adopt different compositions. From the reaction carried out with NiCl2 and NaOH in quinoline and water, a hetero bimetallic coordination polymer; namely, NaL(H2O)]2Ni(H2O)4]n (4) is obtained. A similar reaction in pyridine-water solvent led to {Ni(L)(py)3}.py]n (5). The coordination polymer 5 has pyridine in its interstices held by C–H···π interactions. |
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