Synthesis and Crystal Structure of a Two‐dimensional Silver(I)‐Iron(III) Heteronuclear Coordination Polymer: {[Ag,Fe2(SCN)12(H2O)2] [(inaH)2(H2O)2]}n

Abstract

AbstractThe 2‐D heteronuclear coordination polymer {[Ag4Fe2(SCN)12(H2O)2] (inaH)2(H2O)2}n(1) (inaH is the abbreviation of protonated isonicotinic acid) with chemical formula C24Ag4Fe2N14O8S12has been synthesized and characterized by single crystal X‐ray diffraction, elemental analysis and IR spectroscopy. The Ag2S2rings connect two kinds of octahedral geometries of Fe(III) ions, [Fe(NCS)6]3–and Fe(H2O)2(NCS)4]−units with bridging thiocyanate ions leading to 2‐D [Ag4Fe2(SCN)12(H2O)22–anion framework. Four kinds of rings including the unprecedented thirty‐two membered Ag4Fe4(SCN)8rings share comers or edges in the 2‐D anion layer structure. All thiocyanates coordinate to the metal ions according to the HSAB principle with N atoms binding to the Fe(III) ions and with S atoms binding to Ag(I) ions. Pronoated ina cations stabilize the layer structure as counter ions and hydrogen bonds were formed within the pronoated in a cations dimer and between the dimers and the lattice waters. Crystal data:Mr=1560.44, triclinic,P1,a=0.76082(1) nm, b=0.9234 nm, c= 1.85611(4) nm,a=103.0170(10)°, β=93.7780(10)°,y=97.4080(10)°,V= 1.25385(3) nm3, Z=1, μ(Mo Kα)=2.650 mm−1,Dc,=2.067 g · cm−3,F(000)=758,R1=0.0412. wR2=0.1003.