Issue 32, 2006

Structure and magnetic properties of carbonate-bridged five-coordinate nickel(ii) complexes controlled by solvent effect

Abstract

CO2 and HCO3 react with the dinuclear hydroxo-complex [Ni(mcN3)(µ-OH)]2(PF6)2 (mcN3 = 2,4,4,9-tetramethyl-1,5,9-triazacyclododec-1-ene) to form µ-CO3 bridged nickel(II) complexes, [{Ni(mcN3)}2(µ-CO3)](PF6)2 (1a) with a symmetric core in which both nickel atoms are five-coordinate and [Ni(mcN3)(µ-CO3)Ni(mcN3)(MeCN)](PF6)2 (1b) with an asymmetric dinuclear core containing five- and six-coordinate nickel atoms. The magnetic behaviour indicates the existence of antiferromagnetic coupling between the metallic centres. A substantial increase in the value of J occurs when the symmetric five-coordinate nickel species transforms to an asymmetric five- and six-coordinate species by axial coordination of acetonitrile.

Graphical abstract: Structure and magnetic properties of carbonate-bridged five-coordinate nickel(ii) complexes controlled by solvent effect

Supplementary files

Article information

Article type
Paper
Submitted
28 Mar 2006
Accepted
01 Jun 2006
First published
13 Jun 2006

Dalton Trans., 2006, 3906-3911

Structure and magnetic properties of carbonate-bridged five-coordinate nickel(II) complexes controlled by solvent effect

A. A. Lozano, M. Sáez, J. Pérez, L. García, L. Lezama, T. Rojo, G. López, G. García and M. xmlns="http://www.rsc.org/schema/rscart38"> <. D. Santana, Dalton Trans., 2006, 3906 DOI: 10.1039/B604541C

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