Issue 40, 2007
From the journal:

Dalton Transactions

A dinuclear cobalt(ii) complex of calix[8]arenes exibiting strong magnetic anisotropy†‡

Sarah Petit,a   Guillaume Pilet,a   Dominique Luneau,*a   Liviu F. Chibotarub  and  Liviu Ungurb  

* Corresponding authors

a Université Claude Bernard Lyon-1, Laboratoire des Multimatériaux et Interfaces (UMR 5615), Campus de La Doua, Villeurbanne Cedex, France
E-mail: luneau@univ-lyon1.fr
Fax: +33 472 431 160
Tel: +33 472 431 418

b Afdeling Kwantumchemie en Fysicochemie, Katholieke Universiteit Leuven, Celestijnenlaan 200F, Leuven, Belgium
E-mail: Liviu.Chibotaru@chem.kuleuven.be

Abstract

The solvothermal reaction of cobalt(II) acetate with p-tert-butylcalix[8]arene (calix) and triethylamine affords the compound (Et3NH)2 [CoII2(calix)2] (1·2Et3NH) that shows a hydrogen bond bridged dinuclear complex [CoII2(calix)2]2− (1) with cobalt(II) ions in a tetrahedral geometry. The compound crystallises in the monoclinic, space group P21/n with cell parameters a = 14.89(1) Å, b = 20.90(2) Å, c = 30.87(4) Å, β = 102.57(7)°, V = 9376(16) Å3, Z = 2. The magnetic studies together with ab initio calculations are evidence of an important role of the geometry of the second coordination sphere of carbon and hydrogen atoms around the CoO4 core in quantifying the zero field splitting on cobalt sites. This results in strong magnetic anisotropies with a negative axial component on the cobalt fragments.

Graphical abstract: A dinuclear cobalt(ii) complex of calix[8]arenes exibiting strong magnetic anisotropy

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Article information

DOI
https://doi.org/10.1039/B708926K
Article type
Paper
Submitted
13 Jun 2007
Accepted
01 Aug 2007
First published
15 Aug 2007

Dalton Trans., 2007, 4582-4588

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A dinuclear cobalt(II) complex of calix[8]arenes exibiting strong magnetic anisotropy

S. Petit, G. Pilet, D. Luneau, L. F. Chibotaru and L. Ungur, Dalton Trans., 2007, 4582 DOI: 10.1039/B708926K

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