Thallium(I) complexes of fluorinated bis- and tris(pyrazolyl)borate ligands: [H₂B{3,5-(CF₃)₂pz}₂]Tl and [HB{3,5-(CF₃)₂pz}₃]Tl

X-ray crystal structural data at 100 (2) K for the thallium(I) complex of a fluorinated bis(pyrazolyl)borate, {bis[3,5-bis(trifluoromethyl)-1H-pyrazol-1-yl-[kappa]N²]borato}thallium(I), [Tl(C₁₀H₄BF₁₂N₄)], abbreviated as [H₂B{3,5-(CF₃)₂pz}₂]Tl, and the related tris(pyrazolyl)borate, {tris[3,5-bis(trifluoromethyl)-1H-pyrazol-1-yl-[kappa]N²]borato}thallium(I), [Tl(C₁₅H₄BF₁₈N₆)], abbreviated as [HB{3,5-(CF₃)₂pz}₃]Tl, are reported. [H₂B{3,5-(CF₃)₂pz}₂]Tl features a two-coordinate Tl^I atom with a bent geometry and a boat-shaped bis(pyrazolyl)borate ligand. It also has several additional inter- and intramolecular Tl...H and Tl...F contacts in the solid state. The tris(pyrazolyl)borate analogue [HB{3,5-(CF₃)₂pz}₃]Tl has a trigonal-pyramidal thallium centre and features inter- and intramolecular Tl...F contacts.