A Polymeric Silver Lutidine Tetrafluoroborate Compound, [Ag( lut )₂(µ₄-BF₄)]N, With Weak μ₄-Tetrafluoroborate Coordination to Silver

Abstract

Silver tetrafluoroborate reacts with 2,6-lutidine ( lut ), in dichloromethane solution, to form the polymeric compound [Ag( lut )₂(µ₄-BF₄)]_n. The polymeric structure is comprised of [Ag( lut )₂]⁺ units each of which is connected by two bidentate links to two [µ4-BF₄]-anions. The compound crystallizes in the tetragonal space group I4₁/acd with a 15 .O69(4) and c l4.391(3) Å. A full-matrix least-squares refinement on 271 reflections, with I ≥ 2.5σ(I), converged with final R 0.027 and R_w 0.025. The complex exhibits an unusual splitting of the BF₄ v₃ mode into six peaks which has been interpreted as three doublets arising from coupling between the BF₄^- anions attached to the same silver atom.