Synthesis and characterization of silver(i) adducts supported solely by 1,3,5-triazapentadienyl ligands or by triazapentadienyl and other N-donors

Abstract

Halogenated 1,3,5-triazapentadienyl ligands [N{(C₃F₇)C(C₆F₅)N}₂]⁻, [N{(CF₃)C(C₆F₅)N}₂]⁻ and [N{(C₃F₇)C(2,6-Cl₂C₆H₃)N}₂]⁻, alone or in combination with other N-donors like CH₃CN, CH₃(CH₂)₂CN, and N(C₂H₅)₃, have been used in the stabilization of thermally stable, two-, three- or four-coordinate silver(I) adducts. X-Ray crystallographic analyses of {[N{(C₃F₇)C(C₆F₅)N}₂]Ag}_n, {[N{(C₃F₇)C(C₆F₅)N}₂]Ag(NCCH₃)}_n, {[N{(C₃F₇)C(2,6-Cl₂C₆H₃)N}₂]Ag(NCCH₃)}_n, {[N{(CF₃)C(C₆F₅)N}₂]Ag(NCCH₃)₂}_n and {[N{(C₃F₇)C(C₆F₅)N}₂]Ag(NCC₃H₇)}_n revealed the presence of bridging 1,3,5-triazapentadienyl ligands bonded to silver through terminal nitrogen atoms. These adducts are polymeric in the solid state. [N{(C₃F₇)C(2,6-Cl₂C₆H₃)N}₂]AgN(C₂H₅)₃ is monomeric and features a 1,3,5-triazapentadienyl ligand bonded to Ag(I) in a κ¹-fashion via only one of the terminal nitrogen atoms. The solid state structure of [N{(C₃F₇)C(C₆F₅)N}₂]H has also been reported and it forms polymeric chains via inter-molecular N–H⋯N hydrogen-bonding.