Hui-Qing Ye

Synthesis, Three-Dimensional Network Structure, Weak Interactions, and Magnetic Properties of Bis(quinolinium) Tetrachlorocobaltate(II) Dihydrate

A new tetrachlorocobalt(II) salt, [QlH]2[CoCl4]·2H2O(1) ([QlH]+ = quinolinium), has been prepared and characterized by elemental analysis, IR, UV-Vis, ESI-MS, single-crystal X-ray diffraction, and magnetic susceptibility. Compound 1 crystallizes in the monoclinic space group C2/c with cell dimensions a = 11.848(2) Å, b = 10.069(1) Å, c = 18.494(2) Å, β = 101.35(1) Å, V = 2163.3(4) Å3, Z = 4. The unit cell contains two [QlH]+ cations, one [CoCl4]2– anion and two water molecules. The [QlH]+ cations stack and form a 1D column through p···π and π···π interactions. The water molecules are linked to the anions through O-H···Cl hydrogen bonds to form two-dimensional molecular networks. The cations and [CoCl4]2– anions are linked through N-H···O and C-H···O hydrogen bonds and give further rise to a 3D hydrogen-bonding network structure. Magnetic susceptibility measurement in the temperature range 2–300 K shows that 1 exhibits a weak antiferromagnetic coupling behavior with θ = –2.90 K.

Unusual layer structure in an ion-paired compound containing tetra(isothiocyanate) cobalt(II) dianion and 4-nitrobenzylpyridinium: Crystal structure and magnetic properties

A new ion-paired compound [4NO2BzPy]2[Co(NCS)4] (1) ([4NO2BzPy]+ = 1-(4′-nitrobenzyl)pyridinium, NCS− = isothiocyanate) is synthesized and characterized by elemental analysis, IR and UV-Vis spectra, ESI-MS and single crystal X-ray diffraction. Compound 1 is orthorhombic, space group Pbcn, with a = 13.188(2) Å, b = 8.458(1) Å, c = 29.281(4) Å, V = 3266.2(7) Å3, Dcalc = 1.468 g/cm3, Z = 4, F(000) = 1476, R1 = 0.0332. The [Co(NCS)4]2− anions form an unusual layer structure by S…N and S…Co interactions, while the [4NO2BzPy]+ cations stack into a 1D column by the p…π stacking interaction in the solid state of 1. A magnetic measurement in the range 2–300 K shows a weak antiferromagnetic exchange with θ = −2.42 K in 1.

Syntheses, Crystal Structures, and Weak Interactions of Two 4-Substituted Benzyl Triphenylphosphonium Salts Containing Tetrachloromanganate(II) Anion

Two new tetrachloromanganate(II) salts, [4FBzTPP]2[MnCl4] (1) and [4ClBzTPP]2[MnCl4]·2H2O (2) ([4FBzTPP]+ = 1-(4′-fluorobenzyl)triphenylphosphonium; [4ClBzTPP]+ = 1-(4′-chlorobenzyl)triphenylphosphonium), have been prepared and characterized by elemental analyses, UV-Vis, IR, ESI-MS, molar conductivity and single-crystal X-ray diffraction. The single-crystal structure analysis shows that compound 1 crystallizes in the monoclinic space group P21/c, while 2 is triclinic P-1. Both 1 and 2 comprise one [MnCl4]2– anion and two cations, and the [MnCl4]2– anion exhibits distorted tetrahedral coordination geometry. The C‒H···Cl, C‒H···π hydrogen bonds and π···π stacking interactions in 1 and the C‒H···Cl, O‒H···Cl hydrogen bonds in 2 result in the forming of a 3D network structure in the solids.

Synthesis, Structure, and Magnetic Properties of a New Bis(maleonitriledithiolate)nickelate(III) Anion Salt Containing 1-(2′-Chlorobenzyl)-2-aminopyridinium

A new salt, [2ClBz2NH2Py][Ni(mnt)2](1), ([2ClBz2NH2Py]+ = 1-(2´-chlorobenzyl)-2-aminopyridinium, mnt2− = maleonitril-edithiolate), was prepared and characterized structurally by means of CHN elemental analyses, IR, MS spectra and single crystal X-ray diffraction. Compound 1 crystallizes in the monoclinic space group C2/c with lattice contents a = 24.947(2) Å, b = 12.658(1) Å, c = 15.045(2) Å, β = 97.41(1)°, V = 4711.0(8) Å3, and Z = 8. The Ni(III) ions of 1 form a 1D spiral zigzag non-uniform magnetic chain within a [Ni(mnt)2]− column with the Ni···Ni distances of 3.971 and 4.386 Å, whereas two neighboring [2ClBz2NH2Py]+ cations from a dimer by the short Cl···Cl interaction with a distance of 3.585 Å. The cations and anions are linked by N···π, S···π interactions and C-H···N, C-H···S hydrogen bonds. Magnetic susceptibility measurements in the temperature range 2–300 K show that the salt shows characteristic of spin-gap with Δ/kb = 789.1 K.

Syntheses, crystal structures, luminescent and magnetic properties of two molecular solids containing naphthylmethylene triphenylphosphinium cations and tetra(isothiocyanate)cobalt(II) dianion

The reaction of CoCl2 with the naphthalene methylated triphenylphosphinium bromide [n-NAPMeTPP]Br (n=1, 2) and KSCN, in a methanolic medium at ambient temperature, leads to the self-assembly formation of hybrid 2:1 organic-inorganic molecular solids, [1-NAPMeTPP]2[Co(NCS)4](1) and [2-NAPMeTPP]2[Co(NCS)4](2) ([NAPMeTPP](+)=(naphthylmethylene)(triphenyl)phosphinium), which have been characterized by elemental analyses, IR spectroscopy, UV-Vis spectra, ESI-MS, molar conductivity and single-crystal X-ray diffraction structural analyses. Compound 1 crystallizes in the orthorhombic space group Pna21, while 2 does in the monoclinic space group C2/c. The cations form a dimer through the weak intermolecular C-H⋯π interactions in 1 and π⋯π interaction in 2, while the anion and cation are linked by the C-H⋯S hydrogen bond in 1. Two molecular solids show dual functionalities: (1) the broad fluorescence emission around 400nm in the solid state at room temperature; (2) the weak antiferromagnetic coupling behavior.

Syntheses, Weak Interactions, and Crystal Structures of Two Tetrabromocuprate(II) Complexes Containing Benzyl Substituted Alkyl Pyridinium

Two tetrabromocuprate(II) complexes containing substituted benzyl alkyl pyridinium, [Bz-4-MePy]2[CuBr4] (1) and [Bz-4-EtPy]2[CuBr4] (2) ([Bz-4MePy]+ = (1-benzyl-4′-methylpyridinium) [Bz-4-EtPy]+ = 1-benzyl-4′-ethylpyridinium), were crystallized from methanol and dilute HBr solutions, and were determined by single crystal X-ray diffraction. Two complexes crystallize in the orthorhombic system with space group Pna21, and comprise two tortuous cations and one tetrahedral [CuBr4]2– anion. The [CuBr4]2– anions in two complexes form a linear chain by Br···Br interaction with the distance of 4.001 Å for 1 and 4.062 Å for 2, while the combination of C‒H···Br and C‒H···N weak hydrogen bonds, p···π and π···π, interactions consolidate the crystal packing and results in a 3D network structure.

Syntheses, Characterization, and Crystal Structures of Two Tetrachlorocobaltate(II) Salts With 4-Substituted Benzyl Triphenylphosphonium

Two new salts containing tetrachlorocobaltate(II) anion, [4FBz TPP]2[CoCl4](1) and [4ClBzTPP]2[CoCl4]·3H2O(2) ([4FBzTPP]+ = 1-(4’-flurobenzyl)triphenylphosphonium; [4ClBzTPP]+ = 1-(4’-chlorobenzyl)triphenylphosphonium), have been prepared and characterized by elemental analysis, IR, UV-Vis, ESI-MS, molar conductivity, and single-crystal X-ray diffraction. Compound 1 crystallizes in the monoclinic system with space group P21/c, whereas 2 crystallizes in the triclinic system with space group P-1. The [CoCl4]2– anion in two salts exhibits a distorted tetrahedral coordination geometry. The C‒H···Cl, O‒H···Cl, and O‒H···O hydrogen bonds, p···π and π···π interactions, or O···O and Cl···O in 1 and 2 consolidate the crystal packing and give further rise to a 3D network structure.

Syntheses, Weak Interactions, and 3D Network Structures of Two Hybrid Salts Containing Bis(iso-maleonitriledithiolate)nickelate(II) Anion and Substituted Chlorobenzyl Triphenylphosphinium Cation

Two hybrid salts, [2ClBzTPP]2[Ni(i-mnt)2] (1) and [4ClBzTPP]2[Ni(i-mnt)2] (2), were obtained in crystalline form by the reaction of disodium iso-maleonitriledithiolate (K2(i-mnt)) with nickel(II) chloride hexahydrate and 1-(2′-chlorobenzyl)triphenyl-phosphonium or 1-(4′-chlorobenzyl)triphenylphospho-nium bromide ([2ClBzTPP]Br/[4ClBzTPP]Br) in methanol. Two salts were characterized by elemental analyses, UV, IR, ESI-MS, molar conductivity, and single-crystal X-ray diffraction. Both salts crystallize in the triclinic space group P-1 and the central Ni(II) ion has a distorted square planar coordination geometry. Lattice stability is provided by weak interactions observed in 1 and 2 such as C-H···S, C-H···Cl, and C-H···Ni hydrogen bonds and π···π or p···π interactions, which results in the forming of a 3D network structure.

Syntheses, Crystal Structures, Weak Interactions, and Magnetic Properties of Two Bis(maleonitriledithiolate)copper(II) Salts with Substituted Benzyl 1-Methylimidazolium

In two new bis(maleonitriledithiolate)copper(II) salts, [Bz-1-MeIm]2[Cu(mnt)2] (1) and [4-NO2Bz-1-MeIm]2[Cu(mnt)2] (2) ([Bz-1-MeIm]+ = Bz-1-MeMz = 1-methyl-3-benzylimidazolium; [4-NO2Bz-1-MeIm]+ = 1-methyl-3-(4′-nitrobenzyl)imidazolium), 1 crystallizes in the triclinic system with space group P-1, whereas 2 crystallizes in the monoclinic system with space group P21/c. The cations and anions stack alternately into a column by π···π and C‒H···π interactions, and the C‒H···N and C‒H···O hydrogen bonds consolidate the crystal packing and give further rise to a 3D network structure. Magnetic susceptibility measurements show that 1 displays strong antiferromagnetic interaction with θ = –255.98 K, whereas 2 shows weak ferromagnetic coupling with θ = 0.527 K.