Polynuclear NiII and MnII azido bridging complexes. Structural trends and magnetic behavior

Zero-field splitting in metal complexes

The effect of structural parameters on the exchange coupling constant of the title complexes of Cu(II), Ni(II), and Mn(II) is studied by means of density functional calculations on model compounds....

Magnetic Coupling in End-On Azido-Bridged Transition Metal Complexes: A Density Functional Study

An alternating di-(μ-(end-on)azido)−di-(μ-(end-to-end)azido) manganese(II) one-dimensional compound, with formula [Mn(bipy)(N3)2] (bipy = 2,2‘-bipyridine), has been synthesized and characterized. I...

Alternating Ferromagnetic−Antiferromagnetic Interactions in a Manganese(II)−Azido One-Dimensional Compound: [Mn(bipy)(N3)2]

Five new nickel(II) complexes [Ni2L2(N3)2(H2O)2] (1), [Ni2L2(NO3)2] (2), [Ni2L2(O2CPh)(CH3OH)2]ClO4.0.5CH3OH (3), [Ni3L2(O2CPh)4] (4), and [Ni2L2(NO2)2]n (5) have been synthesized by using a tridentate Schiff base ligand, HL (2-[(3-Methylamino-propylimino)-methyl]-phenol), and the polyatomic monoanions N3−, NO3−, PhCOO−, or NO2−. The complexes have been structurally and magnetically characterized. The structural analysis reveals that in all five complexes, the Ni(II) ions possess a distorted octahedral geometry. Complexes 1 and 2 are dinuclear with di-μ-1,1-azido and di-μ2-phenoxo bridges, respectively. Complex 3 is also a di-μ2-phenoxo-bridged dinuclear Ni(II) complex but has an additional syn−syn benzoate bridge. Compound 4 possesses a linear trinuclear structure with the tridentate Schiff base ligand coordinated to the terminal nickel atoms which are linked to the central Ni(II) by phenoxo and carboxylate bridges. Complex 5 consists of a dinuclear entity, bridged by di-μ2-phenoxo together with a cis-(μ...

The crucial role of polyatomic anions in molecular architecture: structural and magnetic versatility of five nickel(II) complexes derived from A N,N,O-donor Schiff base ligand.

Luis Lezam

Papers

Crystal structure and magnetic properties of [Ni(terpy)(N3)2]2·2H2O, a nickel(II) dinuclear complex with ferromagnetic interaction