Effect of the Schiff-base-containing triazole ligand and counter anion on the construction of dimeric silver and polynuclear copper complexes

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• 作者：Ai-Ju Zhou^a ; ^{ahcfzhouaiju@163.com} ; Min Li^a ; Jing-Jing Liang^a ; Jing-Cai Chen^b ; Jian-Hua Zhang^a ; Shu Ding^b ; Ming-Liang Tong^b
• 关键词：Triazole ; Hydrogen bond ; Multinuclear copper(II) ; Crystal structure
• 刊名：Polyhedron
• 出版年：2012
• 出版时间：14 November, 2012
• 年：2012
• 卷：48
• 期：1
• 页码：117-124
• 全文大小：1053 K

文摘

Five new complexes, namely [Ag₂(tmat)₂(MeCN)₂](PF₆)₂ (1), [Ag₂(tmat)₄](PF₆)₂ (2), [Ag₂(tmat)₄](CF₃SO₃)₂ (3), [Cu₃(tmat)₆(H₂O)₆](ClO₄)₆¡¤4H₂O (4) and [Cu₄(OH)₂(OAc)₆(tmat)₂]¡¤2H₂O (5), have been obtained from the reactions of silver(I) or copper(II) salts with (E)-(thiophen-2-yl)-N-(4H-1,2,4-triazol-4-yl)methanimine (tmat). Complexes 1-3 are based on Ag dimers and have extended solid-state structures formed by different weak interactions. The Ag(I) atoms exhibit a Y-shape coordination geometry in dimeric 1, in which Ag-¦Ð and Ag?S weak interactions can be found. Complex 2 is constructed from dinuclear [Ag₂(tmat)₄]²⁺ cations and PF₆^? anions, which are further connected to form a quasi-3D structure by C-H?F hydrogen bonds. In 3, the Ag(I) atoms exhibit a distorted tetrahedral geometry and rich non-classical weak interactions, such as F?S, sustain the packing structure. Complexes 4 and 5 are linear trinuclear and planar tetranuclear complexes, respectively. Complex 5 is an antiferromagnetic complex with J_wb = ?77.5 cm^?1, J_bb = ?33.8 cm^?1 (g = 2.0). A discussion of the crystal structures, as well as the coordination properties of the tmat ligands with different counter anions, has been provided.