Synthesis and Crystal Structure of a Novel Polymeric Lead(II) Complex with Thiosemicarbazonato and Thiocyanate Ligands
2014
Castiñeiras, A. (Alfonso) | Domínguez, Ricardo | Bresolin, Leandro | Bordinhão, Jairo | Bortoluzzi, Adaílton João | Hörner, Manfredo
A novel heptacoordinated thiosemicarbazonato lead(II) complex [Pb(4ML)(SCN)] (4ML = 2-Acetylpyridine-⁴N-methylthiosemicarbazonato) was synthesized and characterized by conventional methods (IR and elemental analysis) and single-crystal X-ray diffraction. [Pb(4ML)(SCN)] shows an unusual polymeric structure in which the lead atom is hexa-coordinate, the deprotonated thiosemicarbazone both chelates and bridges, and the thiocyanate group acts as bridge between lead(II)-thiosemicarbazonate fragments. There is hydrogen-bonding between the polymeric chains. The complex crystallizes in the triclinic space group P 1̅̅ with a = 7.461(2), b = 9.572(2), c = 11.235(2) Å, α = 66.51(3), β = 84.01(3), γ = 68.75(3)°, V = 685.1(2) ų, Z = 2.
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