Synthesis and crystal structure of a group of phenoxo-bridged heterodinuclear [Ni^IIHg^II] Schiff base complexes

Autor(en)

Debasis Karmakar, Michel Fleck, Rajat Saha, Manas Layek, Sanjay Kumar, Debasis Bandyopadhyay

Abstrakt

Four new heterodinuclear complexes of a group of the general formula, [NiHg(L)Cl2] where the Schiff base anion, L = 2,2'-[propane-1,2-diylbis(nitrilomethylylidene)] diphenolate (L1), (1); 2,2'-[propane-1,2-diylbis(nitriloeth-1-yl-1-ylidene)] diphenolate (L2), (2); 2,2'-[propane-1,2-diylbis(nitriloprop-1-yl-1-ylidene)] diphenolate (L3), (3) and 2,2'-[propane-1,3-diylbis(nitrilomethylylidene)] diphenolate (L4), (4) have been prepared. The syntheses have been achieved by reacting equimolar amounts of nickel perchlorate, mercuric chloride and the respective tetradentate Schiff base ligand (H2L) in methanol medium. The complexes have been characterized by microanalytical, spectroscopic, single crystal X-ray diffraction and other physicochemical studies. Structural studies on 1-4 reveal the presence of a heterodinuclear [NiIIHgII] unit in which the central Ni(II) and Hg(II) ions are connected to each other by two phenolate oxygen bridges. In each of the complexes, the Ni(II) ion adopts a distorted square planar (NiO2N2) geometry while the Hg(II) ion assumes a distorted tetrahedral arrangement (HgO2Cl2). The dinuclear units in 1-4 are self-assembled through weak intermolecular p…... interactions to build up supramolecular network in their solid state.

Organisation(en)

Institut für Mineralogie und Kristallographie

Externe Organisation(en)

Bankura Christian College, Jadavpur University

Journal

Polyhedron

Band

49

Seiten

93-99

Anzahl der Seiten

7

ISSN

0277-5387

DOI

https://doi.org/10.1016/j.poly.2012.09.024

Publikationsdatum

2013

Peer-reviewed

Ja

ÖFOS 2012

105116 Mineralogie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/59baadcd-4e1c-4a8a-8ee8-d50d6919af5b