Syntheses, Structures, and Magnetic Properties of Two Kinds of Unique Heterometallic Chains with Mixed-Bridging Ligands of Tricyanometalate and Alkoxide

Abstract

The reactions of copper(II) salts, 1,3-bis(dimethylamino)-2-propanol (bdmapH) or 1,3-bis(amino)-2-propanol (bapH) and [(Tp)Fe(CN)(3)](-) (Tp = tris(pyrazolyl)hydroborate) gave four mixed-bridged heterometallic one-dimensional (1D) coordination polymers, {[(Tp)(2)Fe(2)(CN)(6)(OAc)(bdmap)Cu(2)(H(2)O)]·2H(2)O}(n) (1, HOAc = acetic acid), {[(Tp)(2)Fe(2)(CN)(6)(Pa)(bdmap)Cu(2)(H(2)O)]·2MeCN}(n) (2, HPa = propionic acid), {[(Tp)(2)Fe(2)(CN)(6)(Tfa)(bdmap)Cu(2)(H(2)O)]·2MeCN}(n) (3, HTfa = trifluoroacetic acid), and {[(Tp)(2)Fe(2)(CN)(6)(OAc)(bap)Cu(2)(MeOH)]·2MeOH·H(2)O}(n) (4). Complexes 1-3 show unique branched zigzag chain structures and complex 4 exhibits as a steplike chain. Ferromagnetic interactions between Fe(III) and Cu(II) ions by bridging cyanides are observed in all complexes. Strong antiferromagnetic interactions are presented between the Cu(II) ions in complexes 1-3, whereas similar antiferromagnetic coupling between Cu(II) ions is obviously weakened in complex 4 because of the distortion of penta-coordinated Cu(II) ions.

Five new Zn(II) and Cd(II) coordination polymers constructed by 3,5-bis-oxyacetate-benzoic acid: Syntheses, crystal structures, network topologies and luminescent properties

“…For 1, 2, 3 and 5, it is necessary to keep a strict ratio of bpp, 2,2 0 -bipy or bimb; otherwise, the reactions will lead to other complexes, which have been validated by X-ray diffraction. The IR stretching frequencies of the carboxyl found in the range of 1583-1622 and 1405-1425 cm À 1 for complexes 1-5 are related to antisymmetric u as (COO À ) and symmetric u s (COO À ) stretching vibrations, which fall in the normal range of the reported values [30].…”

Syntheses and crystal structures of four cyanide-bridged trinuclear iron(III)–copper(II)–iron(III) complexes exhibiting abnormal antiferromagnetic coupling

“…Many such compounds have been successfully prepared based on appropriate ligands, suitable magnetic centers and effective bridging groups. It is well known that the cyanide group, with the advantages of controllable molecular topological structure and the predictable magnetic coupling between metal atoms, provides a possibility of purposeful design and synthesis of interesting molecule-based magnetic materials [8][9][10][11][12]. Therefore, a large number of cyanide-bridged M I -M 0 (M = Fe, Cr, Ru and Mn; M 0 = Cu II , Ni II , Mn II , Mn I , etc.)…”

A 2D Cd(II) Coordination Polymer Constructed From 1,3-di(4-pyridyl)propane and 2,7-naphthalenedisulfonate

“…[4][5][6][7][8][9][10][11][12][13][14][15][16] In recent years, many efforts have been devoted to reasonably designing the synthetic routine and modifying the organic ligands. Organic carboxylate ligands have been widely used in synthesizing MOFs with expected properties due to the controllable length of ligands and the various coordination modes of the carboxyl groups.…”