两种具有三氰根和烷氧基混合桥联配体的独特异金属链的合成、结构和磁性。

Syntheses, structures, and magnetic properties of two kinds of unique heterometallic chains with mixed-bridging ligands of tricyanometalate and alkoxide.

机构信息

State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093, PR China.

出版信息

Inorg Chem. 2010 Oct 18;49(20):9275-82. doi: 10.1021/ic100861n.

DOI:10.1021/ic100861n

PMID:20863087

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.

摘要

铜(II)盐与 1,3-双（二甲氨基）-2-丙醇（bdmapH）或 1,3-双（氨基）-2-丙醇（bapH）和[(Tp)Fe(CN)(3)]-（Tp = 三（吡唑基）硼氢化物）反应得到了四个混合桥联的异金属一维（1D）配位聚合物，{[(Tp)(2)Fe(2)(CN)(6)(OAc)(bdmap)Cu(2)(H(2)O)]·2H(2)O}(n)（1，HOAc = 乙酸），{[(Tp)(2)Fe(2)(CN)(6)(Pa)(bdmap)Cu(2)(H(2)O)]·2MeCN}(n)（2，HP a = 丙酸），{[(Tp)(2)Fe(2)(CN)(6)(Tfa)(bdmap)Cu(2)(H(2)O)]·2MeCN}(n)（3，HTfa = 三氟乙酸），和{[(Tp)(2)Fe(2)(CN)(6)(OAc)(bap)Cu(2)(MeOH)]·2MeOH·H(2)O}(n)（4）。配合物 1-3 显示出独特的分支锯齿链结构，配合物 4 表现为阶梯链。所有配合物中都观察到通过桥连氰化物的 Fe(III)和 Cu(II)离子之间的铁磁相互作用。在配合物 1-3 中，Cu(II)离子之间呈现强反铁磁相互作用，而在配合物 4 中，由于五配位 Cu(II)离子的扭曲，Cu(II)离子之间的类似反铁磁耦合明显减弱。