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- Title
Synthesis, spectral and antimicrobial studies of a novel macrocyclic ligand containing a piperazine moiety and its binuclear metal complexes.
- Authors
Nishat, Nahid; Haq, M. M.; Ahamad, Tansir; Kumar, Vikrant
- Abstract
A novel macrocycle 1,16-diaza-7,10-diamino-6,11-dioxo-1,17-bis[2′-hydroxy-5′-aminobenzyl]-piperazine-4,12-cyclododecadiene, [H4L] has been synthesized by a multistep process. The interaction of 5-amino salicylic acid, piperazine and formaldehyde in ethanol gave PC-1, which was reduced into a chloro-derivative PC-2. PC-2 by reacting with ethylenediamine gave a new macrocyclic ligand titled [H4L]. Its binuclear complexes with Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) ions have also been synthesized. The ligand and all metal complexes have been characterized by elemental analysis, IR, 1H NMR, 13C NMR and U.V.Visible spectroscopy. Molar conductance and magnetic moment measurements have also been determined. Microanalytical data revealed 1 : 2 molar ratio of ligand to metal in all the complexes. The spectral and magnetic data indicate that Mn(II), Co(II), Ni(II) complexes show octahedral geometry with two water molecules while Cu(II) and Zn(II) complexes exhibit square planar and tetrahedral environments, respectively. The compounds show significant inhibitory activity against seven bacteria and seven fungi.
- Subjects
MACROCYCLIC compounds; LIGANDS (Chemistry); METAL complexes; COMPLEX compounds synthesis; SPECTRUM analysis; PIPERAZINE; ANTIBACTERIAL agents; ANTIFUNGAL agents
- Publication
Journal of Coordination Chemistry, 2007, Vol 60, Issue 1, p85
- ISSN
0095-8972
- Publication type
Academic Journal
- DOI
10.1080/00958970600791400