Coordination networks of Cu²⁺ ions with 1,3-bis[2-(4-pyridyl)ethyl]benzene: Strong structure-directing role of the counter ion (nitrate, acetate and sulphate), leading to clusters, sheets and chains

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• 作者：M. John Plater ; Ben M. De Silva ; Mark R. St J. Foreman ; William T.A. Harrison ; ^{w.harrison@abdn.ac.uk" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Cluster ; Coordination polymer ; Flexible ligand ; Copper ; Crystal structure
• 刊名：Polyhedron
• 出版年：2015
• 出版时间：14 December 2015
• 年：2015
• 卷：102
• 期：Complete
• 页码：496-502
• 全文大小：3799 K

文摘

The crystal structures of three compounds formed from the crystallisation of different copper(II) salts (nitrate, acetate and sulphate) with the new ligand 1,3-bis[2-(4-pyridyl)ethyl]-benzene, C₂₀H₂₀N₂ (L) are reported. The anion is incorporated into each structure, but it plays a completely different role in each case: [Cu₂L₄(NO₃)(H₂O)₂]·3(NO₃) (1) contains discrete ‘paddlewheel’ bimetallic clusters incorporating a nitrate ion at their centres. [Cu₂L(Ac)₃(OH)]_n (2) contains unusual tetra-metallic clusters in which the acetate ions display three different coordination modes: the L ligands link the clusters into (100) sheets. [CuL₂(SO₄)]_n·2n(H₂O) (3) contains looped [0 1 0] chains in which both the L ligands and sulphate ions bridge adjacent metal ions. Crystal data: 1, C₈₀H₈₄Cu₂N₁₂O₁₄, M_r = 1564.67, tetragonal, space group I4/m, a = 15.2358 (4) Å, c = 16.5372 (6) Å, V = 3838.8 (2) Å³, Z = 2, R(F) = 0.054, wR(F²) = 0.142. 2, C₂₆H₃₀Cu₂N₂O₇, M_r = 609.60, monoclinic, space group P2₁/c, a = 15.9076 (6) Å, b = 11.8299 (4) Å, c = 14.4234 (4) Å, β = 107.646 (1)°, V = 2586.56 (15) Å³, Z = 4, R(F) = 0.043, wR(F²) = 0.109. 3, C₄₀H₄₄CuN₄O₆S, M_r = 772.39, triclinic, space group $p\overline{1}$, a = 10.513 (2) Å, b = 12.925 (4) Å, c = 14.769 (4) Å, α = 91.126 (11)°, β = 109.749 (9)°, γ = 100.658 (9)°, V = 1848.9 (8) Å³, Z = 2, R(F) = 0.108, wR(F²) = 0.274.