Synthesis and Structure of New Water-Soluble Ag(I) and Pb(II) Complexes with Sulfonyl-Substituted Derivatives of the closo-Decaborate Anion

Resumo

The  reactivity  of  sulfonyl-substituted  closo-decaborate  derivatives  (the  [2-B₁₀H₉SH]^2–  and [2-B₁₀H₉S(CН₂C(О)NН₂)₂]^– anions) in the complexation of Ag(I) and Pb(II), Pearson soft acids, in the presence of competitive organic ligands has been studied. The substituted derivatives act as bridging ligands to form silver(I) binuclear complexes [(Ag(bipy)₂)₂(2-B₁₀H₉SH)] and [(Ag(bipy)₂)₂(2-B₁₀H₉S(CН₂C(О)NН₂)₂]NO₃; the [2-B₁₀H₉SH]^2– anion is involved in the lead(II) coordination polyhedron in the [Pb(2-B₁₀H₉SH)] and [Pb(bipy)₂(2-B₁₀H₉SH)] complexes; in [Pb(bipy)₂][2-B₁₀H₉S(CН₂C(О)NН₂)₂]₂, the substituted decaborate derivative acts as a counterion. The solubility of the mixed-ligand complexes is different due to the variety of their structures. The synthesized complexes are the first water-soluble lead and silver compounds with the closo-decaborate anion.