Structural Variability of Cobalt(II) Coordination Polymers: Three Polymorphs of Co_3(TMA)_2 [TMA = Trimesate, C_6H_3(COO)_3~(3-)]

Deping Cheng; Masood A. Khan; Robert P. Houser

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Structural Variability of Cobalt(II) Coordination Polymers: Three Polymorphs of Co_3(TMA)_2 [TMA = Trimesate, C_6H_3(COO)_3~(3-)]

机译：钴（II）配位聚合物的结构变异性：Co_3（TMA）_2的三种多晶型物[TMA = Trimesate，C_6H_3（COO）_3〜（3-）]

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The aqueous reaction of cobalt(II) sulfate with trimesic acid (H_3TMA = 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, {[NaCo_3(TMA)_2(μ_3-OH)](μ_2-H_2O)_4(H_2O)_7·1.5H_2O}n (1), is produced. Compound 1 contains NaCo_3(OH) clusters connected via TMA ligands into 1D chains, and 1 crystallizes in the orthorhombic space group Pbca with a = 18.907(2) A, b = 14.565(3) A, c = 21.414(4) A, and Z = 8. When triethylamine is used, the previously reported 1D zigzag chain coordination polymer, [Co_3(TMA)_2(H_2O)_(12)]_n (2), is produced. When tetraethylammonium hydroxide is used, a trinuclear cobalt(II) complex, [Co_3(TMA)_2(H_2O)_(14)]·4H_2O (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 with a = 6.6542(5) A, b = 10.7114(7) A, c = 12.3567(7) A, α= 99.008(4)°, β = 102.553(6)°, γ = 107.344(7)°, and Z = 1.

机译：在碱的存在下，硫酸钴（II）与偏苯三酸（H_3TMA = 1,3,5-苯三甲酸）的水反应产生通式为Co_3（TMA）_2的配合物。碱的身份决定了形成的复合物的特定结构特征。当使用氢氧化钠时，制备了新型的钴（II）配位聚合物{[NaCo_3（TMA）_2（μ_3-OH）]（μ_2-H_2O）_4（H_2O）_7·1.5H_2O} n（1）。化合物1包含通过TMA配体连接到1D链中的NaCo_3（OH）簇，并且1在正交空间群Pbca中结晶，其a = 18.907（2）A，b = 14.565（3）A，c = 21.414（4）A， Z ＝ 8。当使用三乙胺时，产生先前报道的一维Z字形链配位聚合物[Co_3（TMA）_2（H_2O）_（12）] _ n（2）。当使用氢氧化四乙铵时，会产生三核钴（II）配合物[Co_3（TMA）_2（H_2O）_（14）]·4H_2O（3），其结构与2字形链的链段相同。化合物3在三斜空间群P中结晶，其a = 6.6542（5）A，b = 10.7114（7）A，c = 12.3567（7）A，α= 99.008（4）°，β= 102.553（6）° ，γ= 107.344（7）°，Z = 1。

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《Crystal growth & design》 |2004年第3期|共6页
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Deping Cheng; Masood A. Khan; Robert P. Houser;
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机译：无机配位聚合物。八。钴（II）和锌（II）次膦酸盐聚合物和共聚物。

Structural Variability of Cobalt(II) Coordination Polymers: Three Polymorphs of Co_3(TMA)_2 [TMA = Trimesate, C_6H_3(COO)_3~(3-)]

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