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New ternary complexes of copper(II) with 2,2 `-bipyridine (Bpy) and phosphocholine (PCh(-)) or the quaternary 1-(2-phosphonomethoxy)ethyl derivative of 2,4-diaminopyrimidine (PMEDAPy(-))

Fernandez-Botello, Alfonso and Escuer, Albert and Solans, Xavier and Font-Bardia, Merce and Holy, Antonin and Sigel, Helmut and Moreno, Virtudes. (2007) New ternary complexes of copper(II) with 2,2 `-bipyridine (Bpy) and phosphocholine (PCh(-)) or the quaternary 1-(2-phosphonomethoxy)ethyl derivative of 2,4-diaminopyrimidine (PMEDAPy(-)). European journal of inorganic chemistry, 2007, H. 13. pp. 1867-1873.

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Official URL: http://edoc.unibas.ch/dok/A5248977

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Abstract

The polynuclear Cu-II complexes [Cu4Cl2 (bpy)(4)(PCh(-))(2)] (ClO4)(4)center dot H2O (1) and [Cu-6(bpy)(6)(PMEAPy(-))(4)](ClO4)(8)center dot 2H(2)O (2), where bpy = 2,2`-bipyridine, PCh(-) = phosphocholine ([2-(phosphonooxy)ethyl]trimethylammonium) and PMEDAPy(-) = 1-[2(phosphonomethoxy) ethyl]-2,4-diaminopyrimidine, have been synthesized and characterized by X-ray single-crystal analysis. Compound 1 crystallizes in the triclinic system (P-1 space group) and consists of tetranuclear Cu-II units, which are threefoldly bridged by mu(3)-O, O`, O``-phosphate groups in a square arrangement around the copper atoms. Complex 2 crystallizes in the monoclinic system (P2(1)/c space group) and consists of hexanuclear Cu-II units containing the same kind of mu(3)-phosph(on)ate bridges like 1 and in addition mu(4)-O, O`, O`` -phosphonate bridges. The topology of compound 2 can be envisaged as two triangular subunits linked by means of a double Cu–O–Cu bridge provided by the μ4-phosphonate unit. Magnetic susceptibility measurements of the two complexes in the temperature range of 2–300 K show weak antiferromagnetic couplings mediated by the phosph(on)ate bridges.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie
UniBasel Contributors:Sigel, Helmut
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Wiley-VCH Verlag
ISSN:1434-1948
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:14 Sep 2012 06:56
Deposited On:22 Mar 2012 14:08

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