Synthesis and crystal structure of two new heteropolynuclear [NiIICdIICdIINiII] and [NiIICdIINiII] Schiff base complexes involving bridging chlorine and oxygen functions
- Autor(en)
- Debasis Bandyopadhyay, Tapan Kumar Karmakar, Guillaume Pilet, Michel Fleck
- Abstrakt
Two new heteropolynuclear Schiff base complexes, [Ni2Cd2L2Cl2(µ-Cl)2] (1) and [Ni2CdL'2Cl(H2O)]ClO4·H2O (2) where L = [N,N'-bis(2-hydroxyacetophenylidene)]propane-1,2-diamine and L' = [N,N'-bis(2-hydroxypropiophenylidene)]propane-1,2-diamine, have been synthesized by refluxing equimolar amounts of nickel perchlorate, cadmium chloride and the respective tetradentate Schiff base ligand, H2L or H2L' in methanol medium. The complexes have been characterized by microanalytical, spectroscopic, single crystal X-ray diffraction and other physicochemical studies. Structural studies on 1 reveal the presence of a bis(heterodinuclear) [NiIICdII]2 unit in which the two central cadmium ions are doubly chloro-bridged with each other and each of them is connected to a nickel(II) center through two phenolate oxygen bridges. In contrast, complex 2 contains a heterotrinuclear [NiIICdIINiII] unit in which the central cadmium ion is connected to two nickel(II) centers through two doubly bridging phenolate oxygen atoms. The Cd(II) ions in 1 and 2 adopt distorted, square pyramidal (CdO2Cl3) and octahedral (CdO5Cl) geometries respectively. On the other hand, the Ni(II) ions in both 1 and 2 assume the same coordination geometry, i.e. a distorted square planar (NiO2N2) arrangement. Intermolecular C-H?Cl or O-H?Cl and O-H?O hydrogen bonding interactions are operative in the complexes to build up 2D supramolecular structures in their solid states.
- Organisation(en)
- Institut für Mineralogie und Kristallographie
- Externe Organisation(en)
- Bankura Christian College, Dukhulal Nibaran Chandra College, Université Claude-Bernard-Lyon-I
- Journal
- Polyhedron
- Band
- 30
- Seiten
- 2678-2683
- Anzahl der Seiten
- 6
- ISSN
- 0277-5387
- DOI
- https://doi.org/10.1016/j.poly.2011.07.026
- Publikationsdatum
- 2011
- Peer-reviewed
- Ja
- ÖFOS 2012
- 105113 Kristallographie
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/83c8dd83-e64c-4edf-952a-32e1c42dafe1