Ferromagnetic coupling via imidazolate in an iron(III)-porphyrin-dicopper(II) system

Koch, Carol; Reed, C. A.; Brewer, Greg; Rath, N. P.; Scheidt, W. Robert; Gupta, Govind P.; Lang, Georgina

doi:10.1021/ja00201a073

Cited by 52 publications

(19 citation statements)

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“…In recent years, studies aimed at characterizing the bonding between imidazole and transition metal ions have been of considerable interest. In particular, binuclear imidazolate-bridged complexes have attracted much attention as models for metalloenzymes (Mao et al, 1995;Koch et al, 1989;Colacio et al, 1998).…”

Section: Commentmentioning

confidence: 99%

Chlorobis(1,10-phenanthroline-κ²N,N′)copper(II) bicarbonate

Zhu

Gao

2006

Acta Cryst E

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Section: Commentmentioning

confidence: 99%

Chlorobis(1,10-phenanthroline-κ²N,N′)copper(II) bicarbonate

Zhu

Gao

2006

Acta Cryst E

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“…With one exception, 33 the magnetically coupled M-im-M(M¢) systems explored to date have displayed antiferromagnetic coupling, and the focus of study has been in establishing its magnitude and mechanism. 7b, 26,33,34 Considering imidazolate-bridged copper systems, the interaction between the Cu II centres can be explained in terms of a s-and/or a p-exchange pathway.…”

Section: Magnetic Susceptibility Studies On Complexmentioning

confidence: 99%

Alcoholysis/hydrolysis of 1,1′-carbonyldiimidazole as a means of preparing unprecedented, imidazole-containing one-dimensional coordination polymers of copper(II)

Stamatatos¹,

Perlepes²,

Raptopoulou³

et al. 2009

Dalton Trans.

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The use of 1,1'-carbonyldiimidazole, (im)(2)CO, for the synthesis of imidazolate (im(-)) and/or imidazole (Him)-containing copper(II) coordination polymers is described. The [Cu(2)(O(2)CMe)(4)(H(2)O)(2)]/(im)(2)CO reaction system in EtOH yields the new polymeric species [Cu(O(2)CMe)(im)(Him)(EtOH)](n) () and the known compound [Cu(im)(2)](n) (), depending on the reaction conditions. A mechanism for the alcoholysis/hydrolysis of (im)(2)CO is proposed. Complex comprises neutral, zigzag chains with the eta(1):eta(1):mu im(-) ligand bridging two neighbouring Cu(II) atoms. Each square pyramidal metal centre is coordinated to two imidazolate nitrogen atoms, the pyridine-type nitrogen atom of the terminal imidazole ligand, one acetate oxygen atom and the ethanol oxygen atom. The dc magnetic susceptibility data for have been analysed according to the Bonner-Fisher model for an equally spaced S = 1/2 chain, revealing moderate antiferromagnetic Cu(II)Cu(II) exchange interactions (J = -33.5 cm(-1) using the H = -2J summation operatorS(i)S(i+1) spin Hamiltonian). The reaction system Cu(NO(3))(2).3H(2)O/(im)(2)CO in EtOH leading to the preparation of known trans-[Cu(NO(3))(2)(Him)(4)] () is also described. With terephthalate(-2) (tp(2-)), instead of MeCO(2)(-), in MeOH/H(2)O the product is the new, 1D linear coordination polymer [Cu(tp)(Him)(2)(H(2)O)](n).2nH(2)O (.2nH(2)O). Adjacent square pyramidal Cu(II) atoms are singly bridged by the bis-monodentate tp(2-) ligand, while two monodentate Him groups and one H(2)O molecule complete five-coordination at each metal centre. The chains of and .2nH(2)O form interesting, hydrogen-bonded 3D networks. The combined work demonstrates the usefulness of (im)(2)CO in the preparation of interesting Cu(II) coordination polymers which can not be obtained by the use of Him.

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“…In view of all this, studies aimed at characterizing the bonding between imidazole and transition metal ions are of considerable interest. There are numerous examples of syntheses, crystal structure determinations and char-acterizations of imidazolate-bridged complexes (Mao et al, 1995;Koch et al, 1989;Colacio et al, 1998, and references therein). We have selected the Cu±im±phen system to extend this research and we present here the crystal structure of the title compound, [Cu(im)Cl(phen)] n , (I).…”

Section: Commentmentioning

confidence: 99%

catena-Poly[[chloro(1,10-phenanthroline-κ²N,N′)copper(II)]-μ-imidazolato-κ²N:N′]

Cai

Shi

et al. 2004

Acta Crystallogr C

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In the polymeric title compound, [Cu(im)Cl(phen)](n), where im is the imidazolate anion (C(3)H(3)N(2)) and phen is 1,10-phenanthroline (C(12)H(8)N(2)), each Cu(II) ion is five-coordinated by four basal N atoms (two from two different im anions and two from one phen ligand) and one axial Cl atom, in a distorted square-pyramidal coordination geometry. Moreover, each im anion bridges two identical [CuCl(phen)](+) cations through its two N atoms, resulting in a one-dimensional zigzag chain along the crystallographic a axis. In addition, pairs of adjacent chains are staggered by pi-pi interactions, generating a two-dimensional layer, and neighbouring layers are further linked by two different kinds of C-H...Cl interactions, producing a three-dimensional network.

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Ferromagnetic coupling via imidazolate in an iron(III)-porphyrin-dicopper(II) system

Abstract: The demonstrated,1 postulated,2 or possible3 existence of histidine-derived imidazoiate bridging ligands in multimetal proteins M z=\ N" "N M'(1) In bovine superoxide dismutase:

Cited by 52 publications

References 2 publications

Chlorobis(1,10-phenanthroline-κ²N,N′)copper(II) bicarbonate

Chlorobis(1,10-phenanthroline-κ²N,N′)copper(II) bicarbonate

Alcoholysis/hydrolysis of 1,1′-carbonyldiimidazole as a means of preparing unprecedented, imidazole-containing one-dimensional coordination polymers of copper(II)

catena-Poly[[chloro(1,10-phenanthroline-κ²N,N′)copper(II)]-μ-imidazolato-κ²N:N′]

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Ferromagnetic coupling via imidazolate in an iron(III)-porphyrin-dicopper(II) system

Abstract: The demonstrated,1 postulated,2 or possible3 existence of histidine-derived imidazoiate bridging ligands in multimetal proteins M z=\ N" "N M'(1) In bovine superoxide dismutase:

Cited by 52 publications

References 2 publications

Chlorobis(1,10-phenanthroline-κ2N,N′)copper(II) bicarbonate

Chlorobis(1,10-phenanthroline-κ2N,N′)copper(II) bicarbonate

Alcoholysis/hydrolysis of 1,1′-carbonyldiimidazole as a means of preparing unprecedented, imidazole-containing one-dimensional coordination polymers of copper(II)

catena-Poly[[chloro(1,10-phenanthroline-κ2N,N′)copper(II)]-μ-imidazolato-κ2N:N′]

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Chlorobis(1,10-phenanthroline-κ²N,N′)copper(II) bicarbonate

Chlorobis(1,10-phenanthroline-κ²N,N′)copper(II) bicarbonate

catena-Poly[[chloro(1,10-phenanthroline-κ²N,N′)copper(II)]-μ-imidazolato-κ²N:N′]