Azide, water and adipate as bridging ligands for Cu(II): Synthesis, structure and magnetism of (mu(4)-adipato-kappa-O)(mu-aqua)(mu-azido-kappa N-1, N-1)copper(II) monohydrate

作者：Setifi Zouaoui; Ghazzali Mohamed; Glidewell Christopher; Perez Olivier; Setifi Fatima^*; Gomez Garcia Carlos J^*; Reedijk Jan^*

来源：Polyhedron, 2016, 117: 244-248.

DOI：10.1016/j.poly.2016.05.060

• Copper
• Adipate
• Ferromagnetic chain
• Metamagnet
• Water bridge

The synthesis, characterization, single crystal structure and magnetic properties of the compound [(CuN3(OH2))(2)(adp)](n) (1) are presented, in which adp stands for the adipate(2-) anion. This compound consists of layers containing chains of six-coordinated Cu(II) ions; the chains are connected by mu(4)-adipate anions. The magnetically interesting part of the compound is the Cu(II) chain, built from 3 bridging ligands, i.e. a water ligand, an azide anionic ligand bridging by using a terminal N atom to connect 2 Cu(II) ions, and one symmetrically bridging carboxylato group of adipate; the other end of the tetradentate adipate anions symmetrically connect the chains, forming the layers.
From the magnetic point of view the compound is considered as a Cu(II) chain with a quite unusual, symmetrical water bridge, the mu-syn-syn carboxylate and the mu-N-3 bridge. The bridging water also hydrogen bonds to a terminal N of a nearby azido ligand. Magnetic susceptibility measurements show that 1 presents moderate ferromagnetic intrachain interactions (J(chain), = +38.4 cm(-1)) with a metamagnetic behaviour for the inter-chain interaction with a critical field of 0.7 T.

• 出版日期2016-10-15