Structural variability of cobalt(II) coordination polymers:: Three polymorphs of Co3(TMA)2 [TAU = trimesate, C6H3(COO)33-]
Structural variability of cobalt(II) coordination polymers:: Three polymorphs of Co3(TMA)2 [TAU = trimesate, C6H3(COO)33-]
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DOI：
10.1021/cg0342415
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发表时间：
2004-05-01
影响因子：
3.8
通讯作者：
Houser, RP
中科院分区：
文献类型：
--
作者：
Cheng, DP;Khan, MA;Houser, RP
硫酸钴（II）与三羧酸（H(3)TMA = 1,3,5-苯三羧酸）在碱存在下的水溶液反应，生成具有通式Co-3(TMA)(2)的配合物。碱的同一性决定了所形成的配合物的具体结构特征。当使用氢氧化钠时，生成了一种新型钴（II）配位聚合物{[NaCo3(TMA)(2)(mu(3)-OH)](mu(2)-H2O)(4)(H2O)(7).1.5 h (2)O}(n)(1)。化合物I含有通过TMA配体连接成一维链的NaCo3（OH）簇，化合物1在正交空间群Pbca中结晶，a = 18.907(2)埃，b = 14.565(3)埃，c = 21.414(4)埃，Z = 8。当使用三乙胺时，生成了先前报道的一维之链配位聚合物[Co-3(TMA)(2)(H2O)(12)](n)(2)。当使用四乙基氢氧化铵时，一种三核钴（II）配合物[Co-3(TMA)(2)(H2O)(14)]。生成的4H(2)O(3)具有与之字形链2的一段相同的结构。化合物3在柱上的三斜空间群P(1)中结晶，a = 6.6542(5)埃，b = 10.7114(7)埃，c = 12.3567(7)埃，α = 99.008(4)度，β = 102.553(6)度，γ = 107.344(7)度，Z = 1。
The aqueous reaction of cobalt(II) sulfate with trimesic acid (H(3)TMA = 1,3,5-benzenetricarboxylic acid) in the presence of a base yields complexes with the general formula Of Co-3(TMA)(2). The identity of the base determines the specific structural characteristics of the complexes formed. When sodium hydroxide is used, a novel cobalt(II) coordination polymer, {[NaCo3(TMA)(2)(mu(3)-OH)](mu(2)-H2O)(4)(H2O)(7).1.5H(2)O}(n) (1), is produced. Compound I contains NaCo3(OH) clusters connected via TMA ligands into 1D chains, and 1 crystallizes in the orthorhombic space group Pbca with a = 18.907(2) Angstrom, b = 14.565(3) Angstrom, c = 21.414(4) Angstrom, and Z = 8. When triethylamine is used, the previously reported 1D zigzag chain coordination polymer, [Co-3(TMA)(2)(H2O)(12)](n) (2), is produced. When tetraethylammonium hydroxide is used, a trinuclear cobalt(II) complex, [Co-3(TMA)(2)(H2O)(14)].4H(2)O (3), is produced that has a structure identical to a segment of the zigzag chain of 2. Compound 3 crystallizes in the triclinic space group P (1) over bar with a = 6.6542(5) Angstrom, b = 10.7114(7) Angstrom, c = 12.3567(7) Angstrom, alpha = 99.008(4)degrees, beta = 102.553(6)degrees, gamma = 107.344(7)degrees, and Z = 1.