Dinuclear silver(i) complexes for the design of metal–ligand networks based on triazolopyrimidines
作者:Ana B. Caballero、Jana K. Maclaren、Antonio Rodríguez-Diéguez、Isaac Vidal、Jose A. Dobado、Juan M. Salas、Christoph Janiak
DOI:10.1039/c1dt10603a
日期:——
Silver(I) coordination complexes with the versatile and biomimetic ligands 1,2,4-triazolo[1,5-a]pyrimidine (tp), 5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidine (dmtp) and 7-amine-1,2,4-triazolo[1,5-a]pyrimidine (7atp) all feature dinuclear [Ag2(μ-tp)2]2+ building units (where tp is a triazolopyrimidine derivative), which are the preferred motif, independently of the counter-anion used. According to AIM (atoms in molecules) and ELF (electron localization function) analyses, this fact is due to the great stability of these dinuclear species. The complexes structures range from the dinuclear entities [Ag2(μ-tp)2(CH3CN)4](BF4)2 (1), [Ag2(μ-tp)2(CH3CN)4](ClO4)2 (2), [Ag2(μ-7atp)2](ClO4)2 (3) and [Ag2(μ-dmtp)2(CH3CN)](PF6)(ClO4) (4) over the 1D polymer chain [Ag2(μ-CF3SO3)2(μ-dmtp)2]n (5) to the 3D net [Ag2(μ3-tp)2](PF6)2· â¼6H2O}n (6) with NbO topology.
银(I)与多功能仿生物配体 1,2,4-三唑并[1,5-a]嘧啶(tp)、5,7-二甲基-1,2,4-三唑并[1,5-a]嘧啶(dmtp)和 7-氨基-1,2,4-三唑并[1、5-a]嘧啶(7atp)都具有双核[Ag2(δ-tp)2]2+ 构建单元(其中 tp 为三唑并嘧啶衍生物),无论使用哪种反离子,它们都是首选的图案。根据 AIM(分子中的原子)和 ELF(电子定位功能)分析,这是由于这些二核种类具有极高的稳定性。这些配合物的结构包括双核实体 [Ag2(δ-tp)2(CH3CN)4](BF4)2 (1)、[Ag2(δ-tp)2(CH3CN)4](ClO4)2 (2)、[Ag2(δ-7atp)2](ClO4)2(3)和[Ag2(δ-dmtp)2(CH3CN)](PF6)(ClO4)(4)的一维聚合物链[Ag2(δ-CF3SO3)2(δ-dmtp)2]n (5)到具有氧化铌拓扑结构的三维网[Ag2(δ-3-tp)2](PF6)2Â-â¼6H2O}n (6)。