Jump to main content
Jump to site search

Issue 14, 2012
Previous Article Next Article

Dipyridyl β-diketonate complexes and their use as metalloligands in the formation of mixed-metal coordination networks

Author affiliations

Abstract

The iron(III) and aluminium(III) complexes of 1,3-di(4-pyridyl)propane-1,3-dionato (dppd) and 1,3-di(3-pyridyl)propane-1,3-dionato (dmppd), [Fe(dppd)3] 1, [Fe(dmppd)3] 2, [Al(dppd)3] 3 and [Al(dmppd)3] 4 have been prepared. These complexes adopt molecular structures in which the metal centres contain distorted octahedral geometries. In contrast, the copper(II) and zinc(II) complexes [Cu(dppd)2] 5 and [Zn(dmppd)2] 6 both form polymeric structures in which coordination of the pyridyl groups into the axial positions of neighbouring metal centres links discrete square-planar complexes into two-dimensional networks. The europium complex [Eu(dmppd)2(H2O)4]Cl·2EtOH·0.5H2O 7 forms a structure containing discrete cations that are linked into sheets through hydrogen bonds, whereas the lanthanum complex [La(dmppd)3(H2O)]·2H2O 8 adopts a one-dimensional network structure, connected into sheets by hydrogen bonds. The iron complexes 1 and 2 act as metalloligands in reactions with silver(I) salts, with the nature of the product depending on the counter-ions present. Thus, the reaction between 1 and AgBF4 gave [AgFe(dppd)3]BF4·DMSO 9, in which the silver centres link the metalloligands into discrete nanotubes, whereas reactions with AgPF6 and AgSbF6 gave [AgFe(dppd)3]PF6·3.28DMSO 10 and [AgFe(dppd)3]SbF6·1.25DMSO 11, in which the metalloligands are linked into sheets. In all three cases, only four of the six pyridyl groups present on the metalloligands are coordinated. The reaction between 2 and AgNO3 gave [Ag2Fe(dmppd)3(ONO2)]NO3·MeCN·CH2Cl212. Compound 12 adopts a layer structure in which all pyridyl groups are coordinated to silver centres and, in addition, a nitrate ion bridges between two silver centres. A similar structure is adopted by [Ag2Fe(dmppd)3(O2CCF3)]CF3CO2·2MeCN·0.25CH2Cl213, with a bridging trifluoroacetate ion playing the same role as the nitrate ion in 12.

Graphical abstract: Dipyridyl β-diketonate complexes and their use as metalloligands in the formation of mixed-metal coordination networks

Back to tab navigation

Supplementary files

Article information


Submitted
04 Nov 2011
Accepted
22 Dec 2011
First published
26 Jan 2012

Dalton Trans., 2012,41, 4153-4163
Article type
Paper

Dipyridyl β-diketonate complexes and their use as metalloligands in the formation of mixed-metal coordination networks

A. D. Burrows, M. F. Mahon, C. L. Renouf, C. Richardson, A. J. Warren and J. E. Warren, Dalton Trans., 2012, 41, 4153 DOI: 10.1039/C2DT12115H

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

Search articles by author

Spotlight

Advertisements