Structural and Magnetic Properties of Three One-Dimensional Azido-Bridged Copper(II) and Manganese(II) Coordination Polymers
- 6 November 2003
- journal article
- Published by American Chemical Society (ACS) in Inorganic Chemistry
- Vol. 42 (25), 8456-8464
- https://doi.org/10.1021/ic034618w
Abstract
Three one-dimensional (1D) azido-bridged coordination polymers of formula [Cu(L)(N3)2]n (1), [Cu2(Me-L)(N3)4]n (2), and [Mn(L)(N3)2]n (3) have been synthesized and structurally characterized, and their magnetic properties studied, where L and Me-L are 2-(pyrazol-1-ylmethyl)pyridine and 2-(3-methylpyrazol-1-ylmethyl)pyridine, respectively. Compound 1 consists of 1D chains in which the Cu(II) ions with a square pyramidal geometry are alternately bridged by an end-to-end (EE) and an end-on (EO) azido ligands, both adopting a basal−apical disposition. Compound 2 exhibits an unprecedented chain topology built via three different kinds of EO azido bridges. Four Cu(II) ions in the square pyramidal environment are alternately bridged by single and double EO bridges to form a tetranuclear cyclic ring, and neighboring rings are interlinked by double EO bridges to generate a “chain of rings”. The intraannular double azido ions are disposed between metal ions in a basal−basal fashion, and the other two kinds of azido ions adopt the basal−apical disposition. Compound 3 consists of 1D concavo−convex chains in which cis-octahedrally coordinated Mn(II) ions are alternately bridged by double EE and double EO bridges. There exist π−π interactions between the ligands bound to the neighboring Mn(II) ions bridged by the EO bridges. Temperature- and field-dependent magnetic analyses reveal alternate ferromagnetic interactions for 1, dominating ferromagnetic interactions for 2, and alternating ferro- and antiferromagnetic interactions through the EO and EE azido bridges for 3, respectively.Keywords
This publication has 50 references indexed in Scilit:
- New One-Dimensional Azido-Bridged Manganese(II) Coordination Polymers Exhibiting Alternating Ferromagnetic−Antiferromagnetic Interactions: Structural and Magnetic StudiesInorganic Chemistry, 2003
- Tetranuclear nickel(ii) complexes with genuine µ3-1,1,3 and µ4-1,1,3,3 azide bridgesChemical Communications, 2003
- Ferrimagnetic-like ordering in a unique three-dimensional coordination polymer featuring mixed azide/carboxylate-bridged trinuclear manganese(ii) clusters as subunitsElectronic supplementary information (ESI) available: the theoretical expressions of the intra-/inter-molecular magnetic interactions, two-dimensional view of 1, temperature dependence of ac magnetic susceptibility and field dependence of magnetization at 1.97 K. See http://www.rsc.org/suppdata/cc/b1/b106314f/Chemical Communications, 2001
- Ferromagnetic Ordering in a Two-Dimensional Copper Complex with Dual End-to-End and End-On Azide BridgesPublished by Wiley ,2000
- Synthesis, Structural Characterization, and Monte Carlo Simulation of the Magnetic Properties of Two New Alternating MnII Azide 2-D Honeycombs. Study of the Ferromagnetic Ordered Phase below 20 KInorganic Chemistry, 2000
- Alternating Ferromagnetic−Antiferromagnetic Interactions in a Manganese(II)−Azido One-Dimensional Compound: [Mn(bipy)(N3)2]Inorganic Chemistry, 1997
- Ferromagnetic Exchange through Unoccupied Bridging Ligand Orbitals. Optical Spectroscopic Investigation of .mu.-1,1-Azido Copper(II) DimersInorganic Chemistry, 1995
- An empirical correction for absorption anisotropyActa Crystallographica Section A Foundations of Crystallography, 1995
- A novel tetranuclear copper(II) complex with three different types of azide, exhibiting weak antiferromagnetic exchangeJournal of the Chemical Society, Chemical Communications, 1995
- Synthesis, structure, and spectroscopic properties of copper(II) compounds containing nitrogen–sulphur donor ligands; the crystal and molecular structure of aqua[1,7-bis(N-methylbenzimidazol-2′-yl)-2,6-dithiaheptane]copper(II) perchlorateJ. Chem. Soc., Dalton Trans., 1984