Issue 6, 2008
From the journal:

Dalton Transactions

Supramolecular motifs and solvatomorphism within the compounds [M(bpy)3]2[NbO(C2O4)3]Cl·nH2O (M = Fe2+, Co2+, Ni2+, Cu2+ and Zn2+; n = 11, 12). Syntheses, structures and magnetic properties†

Marijana Jurić,a   Berislav Perić,*a   Nevenka Brničević,*a   Pavica Planinić,*a   Damir Pajić,b   Krešo Zadro,b   Gerald Giesterc  and  Branko Kaitnerd  

* Corresponding authors

a Rudjer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
E-mail: planinic@irb.hr

b Department of Physics, Faculty of Science, University of Zagreb, Bijenička cesta 32, 10000 Zagreb, Croatia

c Institut für Mineralogie und Kristallographie, Universität Wien – Geozentrum, Althanstraße, 14, 1090 Wien, Austria

d Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000 Zagreb, Croatia

Abstract

Solvatomorphism has been found between two series of complexes of the composition [M(bpy)3]2[NbO(C2O4)3]Cl·nH2O [M = Fe2+ (1, 2), Co2+ (3, 4), Ni2+ (5, 6), Cu2+ (7) and Zn2+ (8, 9); bpy = 2,2′-bipyridine)], crystallizing in the monoclinic space groupP21/c [3, 5, 8 (n = 11)] or in the orthorhombic space groupP212121 [2, 4, 6, 7 (n = 12)]. All the structures contain two symmetry independent [M(bpy)3]2+ cations, one [NbO(C2O4)3]3− anion, one Cl− anion, and crystal water molecules. The cations possess a trigonally distorted octahedral geometry, with an additional tetragonal distortion in 7. Analysis of crystal packing reveals a specific type of supramolecular contact comprising four bipyridine ligands from two neighbouring [M(bpy)3]2+ cations—quadruple aryl embrace (QAE) contact. The contact is realized by the alignment of two molecular two-fold rotation axes, preserving the parallel orientation of the molecular three-fold rotation axes. The resulting two-dimensional honeycomb lattices of [M(bpy)3]2+ cations are placed between the hydrogen bonding layers made of [NbO(C2O4)3]3− and Cl− anions and the majority of the crystal water molecules. The temperature-dependent magnetic susceptibility measurements (1.8–300 K) show a significant orbital angular momentum contribution for 3 and 4 (high-spin Co2+), the influence of zero-field splitting for 5 and 6 (Ni2+) and a substantially paramagnetic Curie behaviour for the Cu2+ compound (7).

Graphical abstract: Supramolecular motifs and solvatomorphism within the compounds [M(bpy)3]2[NbO(C2O4)3]Cl·nH2O (M = Fe2+, Co2+, Ni2+, Cu2+ and Zn2+; n = 11, 12). Syntheses, structures and magnetic properties

About
Cited by
Related
Download options Please wait...

Supplementary files

Article information

DOI
https://doi.org/10.1039/B707937K
Article type
Paper
Submitted
24 May 2007
Accepted
23 Oct 2007
First published
26 Nov 2007

Dalton Trans., 2008, 742-754

Permissions

Request permissions

Supramolecular motifs and solvatomorphism within the compounds [M(bpy)3]2[NbO(C2O4)3]Cl·nH2O (M = Fe2+, Co2+, Ni2+, Cu2+ and Zn2+; n = 11, 12). Syntheses, structures and magnetic properties

M. Jurić, B. Perić, N. Brničević, P. Planinić, D. Pajić, K. Zadro, G. Giester and B. Kaitner, Dalton Trans., 2008, 742 DOI: 10.1039/B707937K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements