A dinuclear end-on azide-bridged copper(II) compound with weak antiferromagnetic interaction – Synthesis, characterization, magnetism and X-ray structure of bis[(μ-azido-κN1)-(azido-κN1)(1,3-bis(benzimidazol-2-yl)-2-methylpropane)copper(II)]

• Published in: Journal of molecular structure Vol. 1036; pp. 252 - 256
• Main Authors: van Albada, Gerard A., Mutikainen, Ilpo, Roubeau, Olivier, Reedijk, Jan
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 27.03.2013
• Subjects: azides; Azido-bridged; Benzimidazole; Copper; Dinuclear; magnetism; physical properties; Structure; X-radiation; Dinuclear; Azido-bridged; Copper; Structure; Benzimidazole
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2012.11.033

► A centrosymmetric dinuclear azide bridged compound of formula [Cu(μ-N3)(N3)(bbmp)]2 is reported. ► The ligand 1,3-bis(benzimidazol-2-yl)-2-methylpropane binds chelating to Cu. ► The geometry of the dinuclear unit is in agreement with the antiferromagnetic behavior. The centrosymmetric dinuclear compound of formula [Cu(μ-N3-κN1)(N3-κN1)(bbmp)]2 is reported. Synthesis, characterization, physical properties are determined in detail, together with its 3D structure. The dinuclear end-on azide-bridged copper(II) compound displays a weak antiferromagnetic interaction, despite the fact that the magnetic orbitals overlap. The Cu–Cu contact distance is 3.1867(8)Å, while the Cu–Nazide–Cu angle is 103.41(14)°. The IR spectra of the azido ligands are as expected for such coordinated azides.