Coexistence of Spin Canting and Metamagnetism in a One-Dimensional Mn(III) Complex Bridged by a Single End-to-End Azide

Di-μ(1,1)-azido-bis-[(2-{1-[2-(isopropyl-amino)ethyl-imino]eth-yl}phenolato)copper(II)]

In the centrosymmetric binuclear title complex, [Cu₂(C₁₃H₁₉N₂O)₂(N₃)₂], the Cu^II atom adopts an elongated CuON₄ square-based pyramidal coordination geometry, arising from the N,N′,O-tridentate ligand and two bridging end-on azide anions. The O atom is in the basal plane, one of the azide N atoms is in the apical site and the Cu⋯Cu separation is 3.2365 (3) Å. A pair of intra­molecular N—H⋯O hydrogen bonds helps to establish the mol­ecular conformation.

Ferrimagnetic FeIII−MnIII Zigzag Chain Formed by a New mer-Positioned Iron(III) Cyanide Precursor

A new cyanide-bearing molecular precursor, mer-[Fe(pzcq)(CN)(3)]- (1), and a zigzag chain, [Fe(pzcq)(CN)(3)][Mn(salen)].4H(2)O (2), were prepared and characterized in terms of structure and magnetism. Magnetic data reveal that intrachain antiferromagnetic couplings via cyanide ligands in 2 are clearly operating, resulting in a ferrimagnetic nature.

Cyanide-Bridged WV−CoII Double-Zigzag Chain Based on an Octacoordinated W Precursor: Metamagnetism and Spin Canting

A cyanide-bridged W-Co bimetallic complex (1) with a double-zigzag chain structure was characterized in terms of structure and magnetism. Compound 1 exhibits metamagnetism and spin canting induced by the presence of anisotropic CoII ions and noncovalent interactions.

An azido–CuII–triazolate complex with utp-type topological network, showing spin-canted antiferromagnetism

An azido-metal-1,2,4-triazolate coordination polymer, [Cu(trz)(N(3))](n) (trz = 1,2,4-triazolate) was synthesized using hydrothermal methods; the complex has a rare three-dimensional non-interpenetrated utp or (10,3)-d topological network structure and exhibits spin-canted antiferromagnetism at low temperature.

A three-dimensional ferromagnet based on linked copper–azido clusters

Two novel three-dimensional coordination polymers [Cu(6)(N(3))(12)(N-Eten)(2)](n) (1) (N-Eten=N-ethylethylenediamine) and {[Cu(9)(N(3))(18)(1,2-pn)(4)].H(2)O}(n) (2) (1,2-pn=1,2-diaminopropane) have been synthesized by the self-assembly reactions of Cu(NO(3))(2).3H(2)O, NaN(3) and small diamine ligands. Their molecular structures were determined by single-crystal X-ray diffraction. Complex 1 is composed of a neutral 3D coordination framework based on unprecedented hexanuclear copper(ii) clusters which features three types of bridging modes for azide (mu-1,1, mu-1,3 and mu-1,1,3). Complex 2 is a novel 3D coordination polymer featuring octanuclear copper-azido clusters and [Cu(diamine)(2)](2+) units which are linked by azido bridges. Magnetic studies for complex show ferromagnetic ordering at 3.5 K, where the azido bridges mediate ferromagnetic coupling between adjacent Cu(II) ions. The magnetic data for 1 were fitted to a uniform hexanuclear copper model which yielded g=2.21, J=6.26 cm(-1), zJ'=0.39 cm(-1). Complex 2 shows ferromagnetic coupling in the octanuclear unit and antiferromagnetic interaction between neighboring units.