A three‐dimensional heteronuclear polymer of [Ag2Fe(SCN)5‐(DMF)]n containing channels and one‐dimensional Ag2S2‐S‐Ag2S2 chains with Ag…Ag interaction

The Ag2S2 rings connect [Fe(NCS)5(DMF)]2- (DMF=N,N-dimethylformamide) octahedrons by bridging thiocyanates leading to a 3-D [Ag2Fe(SCN)5(DMF)]n framework. The Fe(III) atoms are in the octahedral geometry and Ag(1) atoms are in the distoned tetrahedral geometry. One-dimensional Ag2S2-S-Ag2S2 wave-like strand chains along the b-axis and channels constructed from ten-membered Ag2Fe(SCN)2S rings along the c-axis feature the three-dimensional framework. The Ag…Ag distance of 0.3103(1) nrn in Ag2S2 rings indicates weak Ag…Ag interaction. Such an Ag2S2-S-Ag2S2 chain in silver(I) complexes is unprecedented. Crystal data: M,=635.09, ortho-rhombic, Pnma, a= 1.64214(13) nm, b= 1.40075(11) nm, c=0.84445(7) nm, V=1.9424(3) nm3, Z=4, μ(Mo Kα) =3.278 mm−1, Dcaled=2.172g × cm−3. F(000)= 1220, R1=0.0443, wR2=0.1138.