Synthesis of new 14- and 16-membered macrocycles and their transition metal complexes |
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| Authors: | Sartaj Tabassum Nahid Nishat Farukh Arjmand Lutfullah Khwaja Salahuddin Siddiqi |
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| Institution: | (1) Department of Chemistry, Aligarh Muslim University, 202002 Aligarh, India;(2) Department of Chemistry, University of Bahrain, PO Box 32038, State of Bahrain (AG) |
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| Abstract: | Summary Benzoylacetic acid (1 mol) interacts with ethylenediamine or with propanediamine (2 mol) to yield new N4 macrocycles 1,5,8,12-tetraazacyclotetradeca-2,4,9,11-tetraphenyl-3, 10-dicarboxylic-4,11-diacetic acid- 1,8-diene (L1) and 1,5,9,13-tetraazacyclohexadeca-2,4,10,12-tetraphenyl-3, 11-dicarboxylic-4,12-diacetic acid-1,9-diene (L2), respectively. These macrocycles have been successfully complexed with CrIII, FeIII, MnII, CoII, NiII, CuII and ZnII. The complexes of the divalent metal ions are non-electrolytes, while those of FeIII and CrIII are 1:1 electrolytes in DMSO. On the basis of ligand field spectra and magnetic moments an octahedral geometry has been proposed for all the complexes. |
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