Abstract
The reactions of silver salts AgX [X = OTf (OTf = CF3SO3), ClO4 and BF4] and bis(diphenylphosphino)methane (dppm) with 4,4′-bipyridine (bipy) and its derivations [1,2-di(4-pyridyl)ethane (dpa), 1,2-di(4-pyridyl)ethylene (dpe), 1,3-bis(4-pyridyl)propane (bpp)] lead to six silver(I) complexes: {[Ag2(dppm)2(OTf)]2(μ-bipy)}(OTf)2·2CH3OH (1), {[Ag2(dppm)2(μ-bpp)(OTf)](OTf)·CH3OH}n (2), {[Ag2(dppm)2(CH3CN)]2(μ-dpa)}(ClO4)4·2CH3CN (3), [Ag2(dppm)3](ClO4)2 (4), {[Ag2(dppm)2(μ-bipy)(CH3CN)](BF4)2}n (5) and {[Ag2(dppm)2(μ-dpe)(CH3CN)](BF4)2}n (6). Complexes 1 and 3 are tetranuclear complexes with two eight-membered Ag2P4C2 rings bridged by bipy and dpa respectively. 2, 5 and 6 are of infinite chain structures formed by [Ag2(dppm)2] units linked by bpp, bipy and dpe respectively. 4 is a binuclear compound with two silver atoms bridged by three dppm ligands. All complexes are characterized by X-ray diffraction, fluorescence, 1H and 31P NMR spectroscopy and terahertz time-domain spectroscopy (THz-TDS).
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