Crystal structure of bis(1,10-phenanthroline-κ~2N,N) (tetrafluorophthalato-κO)nickel (II)-tetrafluorophtalic acid (1:1), [Ni(C_8F_4O_4)(C_(12)H_8N _2)_2](C_8H_2F_4O _4), C_(40)H_(18)F_8N_4NiO _8

摘要

(Equation presentation) (Table presentation) Source of material The mixture of Ni(OAc)_2.4H_2O (24.9 mg, 0.1 mmol) and tetrafluorophthalic acid (23.6 mg, 0.1 mmol), 1,10-phenanthroline (19.8 mg, 0.1 mmol), were added to a H2O solution (15 ml) in a Teflon-lined stainless steel reactor. The mixture was heated at 433 K for 3 days, and then slowly cooled to room temperature over 24 hours. Green, block-shaped crystals of the title compound were obtained. Discussion Inorganic-organic hybrid polymers have attracted considerable attention in recent years because of their interestingmolecular topologies and crystal packing motifs along with potential applications in many areas including gas storage, separation, catalysis, magnetism, optics as well as electrical conductivity [1-3]. It is well know that organic ligands play a crucial role in the design and construction of desirable frameworks. Phthalic acid and its derivatives are good candidates to produce unique structural motifs with useful functional properties [4, 5]. The asymmetric unit of the title crystal structure contains one Ni(II) ion, two 1,10- phenanthroline (phen) ligands, and one tetrafluorophthalato ligand, and one cocrystallized tetrafluorophthalic acid molecule. Each Ni(II) ion is trigonal biyramidal coordinated by four N atoms from two chelating phen ligands and one O atom of the twofold deprotonated tetrafluorophthalate ligand. The bond lengths of Ni-O are 1.963(2) ?. The bond lengths of Ni-N are 1.982(3) ?, 1.983(3) ?, 2.089(3) ? and 2.176(3) ?. In the complex, there exist intermolecular hydrogen bonds: d(O7-H7...O3) = 2.731(4) ? and d(O5-H5...O3) = 2.526(3) ? between both carboxyl groups of tetrafluorophthalic acid and carboxylate group of the anionic ligand. In the complex the hydrogen bonds play an important role in forming by self-assembly and stabilizing the supramolecular structure. (Table presentation).