摘要 : The purpose of this study was to investigate whether co-crystals form by simply mixing pure solutions of [Ni(phen) _3](PF _6) _2 and [Ni(phen) _2(phen-dione)](PF _6) _2 where phen is 1,10-phenanthroline and phen-dione is 1,10-phen... 展开 The purpose of this study was to investigate whether co-crystals form by simply mixing pure solutions of [Ni(phen) _3](PF _6) _2 and [Ni(phen) _2(phen-dione)](PF _6) _2 where phen is 1,10-phenanthroline and phen-dione is 1,10-phenan-throline-5,6- dione. The 1:1 cocrystal, [Ni(phen) _2(phen-dione)][Ni(phen) _3](PF _6) _4·CH _3CN has been characterized by elemental analysis, IR, paramagnetic NMR, and UV-vis spectroscopies, cyclic voltammetry, and single crystal X-ray structure analysis. The title complex crystallized in triclinic crystal system (z = 2) with space group of P1?, a = 13.201(2) ?, b = 14.782(3) ?, c = 22.294(4) ?, α = 81.575(15)°, β = 88.756(15)° γ = 88.032(15)° and V = 4300.1(14) ? ~3. A careful inspection of the packing pattern in the lattice reveals that non-covalent interactions of three different types, viz. C-H...F, C=O...H-C and C-H...π interactions, are active in the lattice. The coordination around the Ni(II) centers is a distorted octahedral, with bite angles of 78.3-79.8° for the chelating phen and phen-dione ligands. Cyclic voltammetry of this co-crystal shows that the Ni(III/II) couple is quasireversible. The effective magnetic moment (μ _(eff)) of the co-crystal was measured to be 2.87 BM per Ni(II) ion by Evans method. The magnitude of μ _(eff) is consistent with magnetic moment for octahedral Ni(II) complexes. 收起