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:　{[Ag-2(dppm)(2)　(OTf)](2)(mu-bipy)}(OTf)(2)center　dot　2CH(3)OH　(1),　{[Ag-2(dppm)(2)(mu-bpp)(OTf)](OTf)center　dot　CH3OH}(n)　(2),　{[Ag-2(dppm)(2)(CH3　CN)](2)(mu-dpa)}(ClO4)(4)center　dot　2CH(3)CN　(3),　[Ag-2(dppm)(3)](ClO4)(2)　(4),　{[Ag-2(dppm)(2)(mu-bipy)(CH3CN)](BF4)(2)}(n)　(5)　and　{[Ag-2(dppm)(2)(mu-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,　Sand　6　are　of　infinite　chain　structures　formed　by　[Ag-2(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,　H-1　and　P-31　NMR　spectroscopy　and　terahertz　time-domain　spectroscopy　(THz-TDS).　(C)　2014　Elsevier　Ltd.　All　rights　reserved.