Polynuclear silver(I) complexes of triphenylphosphine and 2-aminopyrimidine: Synthesis, structural characterization and spectroscopic properties

• Published in: Polyhedron 2011-08, Vol.30 (13), p.2253-2259
• Main Authors: Cui, Li-Na, Hu, Ke-Yi, Jin, Qiong-Hua, Li, Zhong-Feng, Wu, Jie-Qiang, Zhang, Cun-Lin
• Format: Article
• Language: English
• Subjects: 2-Aminopyrimidine; Crystal structures; Silver(I) complexes; Spectroscopic properties; Triphenylphosphine
• ISSN: 0277-5387
• DOI: 10.1016/j.poly.2011.06.003

Five new complexes [Ag(PPh 3)(AMP) 2](BF 4) ( 1), [Ag 2(PPh 3) 4(AMP) 2(SO 4)] ( 2), [Ag 4 (PPh 3) 4(AMP) 2(NO 3) 4] ∞ ( 3), [Ag 4(PPh 3) 4(AMP) 2(Ac) 4] ∞ ( 4) and [Ag(PPh 3) 2(HCOO)]·CH 2Cl 2 ( 5) have been synthesized. Compounds 1– 5 are characterized by X-ray single crystal diffraction. Compounds 1– 4 are characterized by luminescence and 1H, 31P NMR spectroscopy. [Display omitted] ► Five new Ag–PPh 3–AMP complexes were isolated and characterized. ► Owing to bridging anions and AMP, and R 2 2 (8) hydrogen bonds, 1– 4 are of infinite chain structure. ► The NMR spectra show that structures of 2– 4 in solution with different counter anions are similar. ► Compounds 1– 4 exhibit intense luminescence at room temperature. The reactions of triphenylphosphine (PPh 3) and 2-aminopyrimidine (AMP) ligand with Ag salts in the mixed solvent of methanol (MeOH) and dichloromethane (CH 2Cl 2) lead to the mono-, di-, and tetranuclear complexes, [Ag(PPh 3)(AMP) 2](BF 4) ( 1), [Ag 2(PPh 3) 4(AMP) 2(SO 4)] ( 2), [Ag 4 (PPh 3) 4(AMP) 2(NO 3) 4] ∞ ( 3) and [Ag 4(PPh 3) 4(AMP) 2(Ac) 4] ∞ (Ac = CH 3COO) ( 4) and [Ag(PPh 3) 2(HCOO)]·CH 2Cl 2 ( 5). Complexes 1 and 2 are of 1D infinite chain structure controlled by intermolecular hydrogen bonds of type R 2 2 (8). In complexes 3 and 4, the 1D infinite chains are formed through the bridging-chelating anions (nitrate for 3 and acetate for 4) and the N,N′-bridging ligand AMP. Five-coordinated modes of Ag(I) are observed in 3 and 4. In the synthesis reaction of complex 5, AMP only acts as catalyst rather than ligand. All the complexes are characterized by X-ray diffraction. Compounds 1– 4 are also characterized by fluorescence and 1H, 31P NMR spectroscopy.