Syntheses and Crystal Structures of Silver(I) Organosulfur Polymers as One-Dimensional Chains

Abstract

Two silver(I) organosulfur coordination polymers, {[Ag₂(mbpsq)^.dmf](NO₃)₂}_n (1) and {[Ag₃(bpsp)₂(CH₃CN)]-(BF₄)₃^.2 H₂O}_n (2), were prepared by self-assembly of silver(I) with the chelating heterocyclic ligands mbpsq and bpsp (mbpsq = 2,3-bis[2-(4-methylpyrimidinyl)methylsulfanyl]-quinoxaline; bpsp = 2,6-bis[(2-pyrimidinyl)-methylsulfanyl]-pyridine). Single-crystal X-ray diffraction analysis reveals that (1) crystallizes in the triclinic space group P1^– with a 10.1937(8), b 11.2160(9), c 13.8445(11) Å, α 103.0620(10), β 106.4850(10), γ; 96.2720(10)°, V 1452.8(2) ų, Z 2. Each mbpsq molecule acts as a hexadentate ligand, in which two nitrogen atoms of the quinoxaline ring and adjacent sulfur atoms form two stable five-membered rings and two nitrogen atoms from different methylpyrimidine rings bridge two silver(I) centers to form a one-dimensional chain structure. Complex (2) crystallizes also in the triclinic space group P1^– with a 12.8119(3), b 13.8902(4), c 15.4534(5) Å, α 70.6980(10), β 68.7570(10), γ; 85.3380(10)°, V 2416.83(12) ų, Z 2. The bpsq molecules act as tridentate and tetradentate ligands ligating three silver(I) centres of different coordination environments to form a one-dimensional zigzag chain.