Synthesis, characterization, and crystal structures of a novel [Zn _3(bba) _6(3-pic) _2] complex (bba = 2-benzoylbenzoat, 3-pic = 3-Picoline)

摘要

A novel trinuclear hekzakis(μ _6-2-benzoylbenzoato-O,O')-bis(3- picoline)-tri-zinc(II) complex, [Zn _3(bba) _6(3-pic) _2] has been synthesized and characterized by elemental analysis, Fourier-transform infrared (FT-IR), ultraviolet/visible (UV/Vis), and mass spectroscopy, thermal methods, and single-crystal x-ray diffraction. The three Zn(II) centers are in two different coordination environments. The central Zn(II) is in a distorted octahedral geometry, while the two terminal Zn(II) centers adopt a distorted tetrahedral geometry. The central and the terminal metal centers are connected through tri μ-2-benzoylbenzoato-O,O' bridges. The crystal packing of the trinuclear complex is stabilized by C-H ?π interaction between bba ligands. The characteristics of the carboxylate anions with typical (OCO) _(asym)and (OCO) _(sym) values are 1594 and 1368 cm ~(-1), respectively.