Synthesis,Crystal Structure and Fluorescent Study of Bis(2-(2-hydroxyphenyl)benzimidazolate)zinc with Ethanol Solvate

Abstract  The zinc(II) complex with 2-(2-hydroxyphenyl)benzimidazole, namely [Zn(2-(2-hydroxyphenyl)benzimidazolate)₂]·C₂H₅OH (1 · C₂H₅OH) has been synthesized and characterized by X-ray crystallography and photoluminescent analysis. The complex crystallizes in monoclinic space group P2₁/c with cell parameters a = 10.156(1) ?, b = 25.771(3) ?, c = 9.674(1) ?, α = 90°, β = 103.641(2)°, γ = 90°, Z = 4, V = 2460.4(4) ?³. The central Zn(II) is four-coordinate and has a tetrahedral geometry. The steady-state and time-resolved photoluminescent spectra for the title compound have also been studied. The emission property can be ascribed to ligand-centered charge-transfer transition (LCCT) with π → π* property. Index Abstract   A new co-crystal of Zn(II) complex of 2-(2-hydroxylphenyl)benzimidazole with ethanol solvate has been prepared, characterized by X-ray crystallography and fluorescent studies.      

Synthesis,Characterization and X-ray Structures of 2,6-Diacetylpyridinebis(benzenesulfonylhydrazide) and its Zinc(II) Complex

Abstract  2,6-Diacetylpyridinebis(benzenesulfonylhydrazide) (2,6-DAPBSH) and its zinc(II) complex have been synthesized and characterized by X-ray crystallography. The ligand crystallizes in the monoclinic crystal system, space group Cc, with cell parameter = 16.808(2) Ǻ, b = 16.328(2) Ǻ, c = 8.2670(11) Ǻ, β = 91.869(9)°, while the zinc(II) complex crystallizes in the orthorhombic crystal system, space group Pbcn, with cell parameters a = 14.5927(3) Ǻ, b = 9.6502(2) Ǻ, c = 20.5610(5) Ǻ. The metal center is seven-coordinate, with an approximate pentagonal bipyramidal configuration of the chelating ligand and two apically coordinated DMSO molecules. Graphical Abstract  X-ray crystallographic study on the [2,6-diacetylpyridine—bis(benzenesulfonylhydrazonato-κ⁵ N′N′′N′′′O′O′′)]bis(dimethyl sulfoxide-κO)zinc(II) (Fig. 1) shows that the complex is a seven-coordinate, with an approximate pentagonal bipyramidal configuration where the ligand coordinates to the zinc(II) ion as a pentadentate chelate via the pyridine nitrogen atom, the two azomethine nitrogen atoms and the two sulfonyl oxygen atoms.      

Using of Taguchi Method for Experimental Design of Crystallization Processes of an Oxidant: Tetraethylammonium Chlorochromate (VI)

Abstract  Crystallization of tetraethylammonium chlorochromate (C₂H₅)₄N[CrO₃Cl], TEACC, with desirable particle size as a performance characteristic was used to illustrate the design procedure. Taguchi design of experiments (DOE) method has been used for to plan a minimum number of experiments and optimization of crystallization processes. Four factors, which influence the crystal size, crystal growth and nucleation, were chosen. These factors are concentration, temperature, type of solvent and method of crystallization. After optimization the results show that concentration is most effective factor that has largest percent of contribution 53.26% and type of solvent is least effective factor that has smallest percent of contribution 4.33%. The optimum conditions are vapor diffusion as method, 0.043 g/15 mL for concentration, 0 °C for temperature and acetonitrile as solvent. These conditions must be produced suitable crystals for single crystal X-ray diffraction experiment. These results confirmed by experimental data and the crystals of the optimum conditions found to have suitable properties for single crystal X-ray diffraction. These crystals had sent for single crystal X-ray diffraction and diffraction data gathered successfully. A red block crystal was mounted on a glass fiber. The X-ray data determined monoclinic system, space group C2(#5), with a = 12.023(3), b = 7.998(2), c = 14.527(4) ?, β = 114.187(4)°, V = 1274.4(6) ?³ and Z = 4. Index Abstract  The Taguchi design of experiments (DOE) method has been used for to plan a minimum number of experiments and optimization of crystallization processes. Electronic supplementary material  The online version of this article (doi:) contains supplementary material, which is available to authorized users.     

Synthesis and Crystal Structure of a Mixed-Ligand Cobalt(II) Complex with 2-Aminobenzimidazole

Abstract  The cobalt(II) complex, [Co(abz)₂(SCN)₂] 1, has been synthesized by the reaction of cobalt(II) nitrate with ammonium thiocyanate and abz ligands (abz = 2-aminobenzimidazole), and was fully structurally characterized by elemental analysis, IR spectra, X-ray diffraction and thermogravimetric experiments. It crystallizes in the triclinic P-1 space group with a = 8.6316(10), b = 9.3426(10), c = 13.254(2) ?, α = 95.793(2), β = 95.870(2), γ = 115.7380(10), V = 945.1(2) ?³, and Z = 2. The central cobalt(II) atom is four-coordinated to nitrogen donors from two neutral abz ligands and two isothiocyanate anions respectively, adopting a slightly distorted tetrahedral geometry. In addition, the intermolecular N–H···N and N–H···S hydrogen bonds interactions link the discrete mononuclear units into infinite three-dimensional networks. Index Abstract  The essence sentence of the paper: In the mixed-ligand mononuclear complex, [Co(abz)₂(SCN)₂], the four coordinated cobalt(II) atom exhibits a slightly distort tetrahedron, which is further assembled into 3D infinite network by intermolecular hydrogen interactions.      

Synthesis, Crystal Structure, Thermal Behavior and IR Characterization of Pentacarbonyl(4-methylpyridine)chromium(0) Complex

Abstract  Pentacarbonyl(4-methylpyridine)chromium(0) complex was isolated from n-hexane solution as yellow plate-like crystals and characterized by using X-ray crystallography. It crystallizes in the orthorhombic system with the space group Cmcm and Z = 4. The unit cell parameters are a = 11.737(1) ?, b = 12.857(2) ?, c = 8.465(1) ?. The single crystal X-ray structure of the complex shows that the coordination sphere around the chromium central atom is slightly distorted octahedron, involving the 4-methylpyridine (4-mp), ligand as a monodentate N-donor ligand and five carbonyl groups. The four equatorial CO groups in the complex, with the Cr–C2 distance of 1.886 Ǻ, are slightly bent away from the 4-methylpyridine ligand with the N–Cr–C2 angle of 91.69°. The pyridine ring plane makes an angle of 135.17° with the Cr–N–CO bond axis. The thermal analysis (differential thermal analysis and thermal gravimetry) and IR spectra of the complex indicated that the compound undergoes complete decomposition to form the Cr₂O₃ as the final decomposition product. Index Abstract  The crystal structure of pentacarbonyl(4-methylpyridine)chromium(0) complex has been determined and its thermal behavior has also been studied.      

Crystal Structure of Meso-tetrakis[4-(pentyloxy)phenyl]porphyrin

Abstract  The crystal structure of the title compound, C₆₄H₇₀N₄O₄, has been determined by single crystal X-ray diffraction methods. The title compound crystallizes in the monoclinic space group P2(1)/c with cell dimensions a = 13.8946(3) ?, b = 16.1069(3) ?, c = 12.1974(2) ?, β = 93.4050(10)°, Z = 2. The porphyrin core to be composed of four pyrrole rings linked through methane carbon bridges. Each molecule lies across a crystallographic inversion center. The porphyrin core is planar, which facilitates π-electron delocalization. The inner nitrogen H atoms are found localized on opposite pyrrole rings and these rings differ structurally from the other two pyrrole rings. The imino H atoms form bifurcated intramolecular hydrogen bonds with the adjacent unprotonated N atoms due to the contract porphyrin core. Graphical Abstract  The crystal structure of meso-tetrakis[4-(pentyloxy)phenyl]porphyrin is reported in this paper.      

Crystal Structure of 4,7-Dichloro-1,2,3,5,6,8-hexakis-(4-methoxy-phenylsulfanyl)-acenaphthylene

Abstract  The title compound was prepared from the reaction of perchloroacenaphthylene with an excess of sodium salt of 4-methyloxythiophenol in toluene/ethanol (1:1) solvent and structurally characterized by single-crystal X-ray diffraction. The compound crystallizes in the Monoclinic space group P2(1) with the parameters: a = 10.351(1) ?, b = 20.453(3) ?, c = 12.1837(16) ?, β = 105.584(3)°, V = 2484.5(6) ?³, with Z = 2 formula units. Graphical Abstract   The title compound 4,7-dichloro-1,2,3,5,6,8-hexakis-(4-methoxy-phenylsulfanyl)-acenaphthylene was synthesized from perchloroacenaphthylene C ₁₂ Cl ₈ with an excess of 4-methoxybenzene thiolate in toluene/ethanol (1:1) .     

Crystal Structure and Magnetic Properties of a Novel Octa-coordinated Manganese(II) Complex

Abstract  The self-assembly and structural characterization of the new manganese(II) [MnL ₂](ClO₄)₂(CH₃OH)_0.5 (1) complex has been achieved. The crystallographic data for the complex 1: Orthorhombic Pbca , a = 16.287(2) ?, b = 21.293(2)?, c = 32.718(3) ?, V = 11,347(2) ?³, Z = 8. The two polydentate ligands strand intertwined each other and around the manganese(II) ions forming a mononuclear complex. The Mn(II) ion is eight-coordinated with the eight donor nitrogen atoms of two ligands to form a distorted square antiprismatic coordination geometry. The magnetic properties investigation indicates that there is a weak antiferromagnetic exchange coupling between the Mn(II) ions of the complex. Index Abstract  An octa-coordinated Mn(II) complex which exhibits a distorted square antiprismatic coordination geometry has been achieved by using a bisbidentate Schiff-base ligand.      

Crystal Structure of N-(tert-Butyl)-1-(3,5-dioxo-2-phenyltetrahydro-4-isoxazolyl)cyclohexane Carboxamide

Abstract  The crystal structure of N-(tert-butyl)-1-(3,5-dioxo-2-phenyltetrahydro-4-isoxazolyl)-cyclohexane-carboxamide 1 has been determined. The title compound crystallized in the orthorhombic space group pbca with cell parameters, a = 10.6556(6) ?, b = 18.0132(11) ?, c = 19.5513(12) ?, v = 3752.7(4) ?³, Z = 8, D _cal = 1.269 Mg/m³ at T = 120 K. The structure refined by full-matrix least-squares procedures to find R ₁ = 0.0463 and wR ₂ = 0.0937 for 3059 reflections. The soxazole ring isn’t coplanar with the phenyl ring. Index Abstract  The crystal structure of N-(tert-butyl)-1-(3,5-dioxo-2-phenyltetrahydro-4-isoxazolyl)-cyclohexane-carboxamide 1 has been studied.      

Crystal and Molecular Structure of Diterpenoid Alkaloid 3-Acetylaconitine

Abstract  3-Acetylaconitine (1), C₃₆H₄₉NO₁₂, was isolated from the ammonium hydroxide wetted root of A. szechenyianum Gay. X-ray diffraction analysis demonstrated that it consists of four-six-membered rings A, B, C, D and two-five-membered rings E, F. The fused-ring system A, B, C and D are in chair, chair, chair and boat conformations, respectively; ring E is in a half-chair; and ring F is in an envelope confirmation. The crystal of 3-acetylaconitine is in orthorhombic crystal system with space group P2₁2₁2₁, lattice constants: a = 9.2002(8) ?, b = 11.06454(9) ?, and c = 33.072(3) ?, V = 3543.3(5) ?³, Z = 4. Index Abstract  3-Acetylaconitine, C₃₆H₄₉NO₁₂, was isolated from the ammonium hydroxide wetted root of A. szechenyianum Gay, and its crystal and molecular structure was determined by X-ray diffraction analysis.      

Synthesis and Crystal Structure of a New Mo(V) Complex of Cyano Ligands

Abstract  A new complex, [H₃teta][Mo(CN)₈] · H₂O, (teta = 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetra-azacyocloteradeca-4,11-diene), has been synthesized and characterized by IR spectrum, element analysis and single crystal X-ray diffraction: monoclinic, space group P2(1)/c with a = 10.8553(8) ?, b = 12.4854(8) ?, c = 22.6348(15) ?, α = 90.00°, β = 97.3080(10)°, γ = 90.00°, Mr = 609.63, v = 3042.8(4), Z = 4. There are one [H₃teta]³⁺, one [Mo(CN)₈]³⁻ and one water molecule in the asymmetric unit. The complex is interconnected through hydrogen bond and formed into a 3D porous network. Graphical Abstract  A new complex, [H₃teta][Mo(CN)₈] · H₂O, has been synthesized and characterized by IR spectrum, element analysis and single crystal X-ray diffraction. And it shows a 3D porous network through hydrogen bonds.      

Syntheses,Crystal Structures and Fluorescence Properties of Zn(II) Complexes with Pyrazolone Derivatives

Abstract   N-(1,3-Diphenyl-4-benzal-5-pyrazolone)-salicylidene hydrazone(H₂L ¹ ) and its zinc complex Zn(HL ¹ )₂ · 2CH₃OH (1) have been synthesized and characterized by elemental analyses, IR spectra, thermal analyses and single-crystal X-ray diffraction studies. The X-ray diffraction analyses of the complex Zn(HL ¹ )₂ · 2CH₃OH (1) and the known compound Zn₄(L ² )₄ (2) (H₂L ²  = N-(1,3-diphenyl-4-phenylethylene-5-pyrazolone)-salicylidene hydrazone) show that different acyl groups in position 4 of pyrazolones may lead to the different coordination mode of the ligands and distinctive structures of the same central metal Zn(II) complexes, of which 1 is a mononuclear complex while 2 is a tetranuclear complex. Meanwhile, two Zn(II) complexes have different thermal stabilities and fluorescence properties. Graphical Abstract        

Synthesis, Crystal Structure and DNA-Binding Study of a New Copper(II) Complex Containing Mixed-Ligand of Iminodiacetate Dianion and 6-Nitro-1H-benzimidazole

Abstract  A mixed-ligand complex Cu(IDA)(NBZIM)(H₂O) (IDA = iminodiacetate dianion, NBZIM = 6-nitro-1H-benzimidazole) has been synthesized and characterized by elementary analysis, IR, UV-Vis, molar conductivity and single crystal X-ray diffraction. It crystallizes in the triclinic system, space group P with a = 6.9423(14), b = 9.3100(19), c = 11.754(2) ?, α = 69.61(3), β = 85.87(3), γ = 83.87(3)°, Z = 2, R ₁ = 0.0463 and ωR ₂ = 0.0987. The single crystal X-ray analysis reveals that the Cu(II) atom is coordinated by one tridentate iminodiacetate dianion, one monodentate nitrobenzimidazole molecule and one water molecule, in a distorted square base pyramidal coordination geometry. The iminodiacetate dianion chelates the Cu(II) atom in the meridional mode. A three-dimensional network is formed by hydrogen bonds and stabilized by NBZIM π-π stacking interactions. The interaction of the complex with Fish sperm DNA has also been studied using absorption spectra. Index Abstract  In the crystal of Cu(IDA)(NBZIM)(H₂O), each molecule is linked to other six neighbouring ones by ‘eight’ hydrogen bonds in four cases by means of the ‘symmetry related’ linkage.      

Crystal Structure of bis(18-Crown-6)-bis(formato-O) dicaesium dihydrate

Abstract  The crystal structure of the title compound, [2Cs⁺(C₁₂H₂₄O₆)₂(CHO₂ ⁻)₂(H₂O)₂], was determined by an X-ray diffraction analysis. The compound crystallizes in the monoclinic space group P2₁ /n with cell parameters a = 10.4278(7) ?, b = 10.0183(5) ?, c = 18.2383(12) ?, β = 93.723(5)°, V = 1910.3(2) ?³ and Z = 2. The Cs cations are bonded to each of the six O atoms of a crown ether ring, two water molecules, and one O atom of a formato anion. As a result of that, a centrosymmetric dimeric dinuclear complex is formed. The two halves of the dimer are connected by a ring of formato anions and water molecules which are linked by O–H···O hydrogen bonds. Index Abstract  The title compound, bis(18-crown-6)-bis(formato-O), caesium dihydrate, features a centrosymmetric dimeric dinuclear complex where two Cs cations are coordinated by six O atoms of a crown ether ring. The two halves of this complex are held together by a ring of formato anions and water molecules which are linked by hydrogen bonds.      

Synthesis, Crystal Structure and Fluorescence Property of a Binuclear Zn(II) Complex: [Zn2(μ-N3)2(N3)2(L)2] [L?=?1-(1,10-phenanthrolin-2-yl)-2-pyridone]

Abstract  Hydrated zinc perchlorate reacted with sodium azide and 1-(1,10-phenanthrolin-2-yl)-2-pyridone (L) in methanol solution and resulted in the formation of a new binuclear complex: [Zn₂(μ-N₃)₂(N₃)₂(L)₂]. The complex has been characterized by elemental analysis and IR spectrum, and its crystal structure determined by X-ray crystallography and the complex crystallizes in the monoclinic system with space group P2₁/c and a = 11.409(2), b = 8.0733(15), c = 18.163(3) Ǻ, β = 99.095(3)°. In the complex two azide anions act as bridge ligand and another two azide anion and two 1-(1,10-phenanthrolin-2-yl)-2-pyridone function as terminal ligands, and Zn(II) ion lies in a distorted triangle bipyramid geometry. Index Abstract  The title binuclear Zn(II) complex was synthesized by zinc perchlorate, sodium azide and 1-(1,10-phenanthrolin-2-yl)-2-pyridone and its crystal structure determined. Single crystal X-ray diffraction analysis reveals that azide anion function as both bridge ligand and terminal ligand, and 1-(1,10-phenanthrolin-2-yl)-2-pyridone only acts as a terminal ligand.      

Synthesis and Crystal Structure of Heptyl 3-(3,4-dihydroxyphenyl)-2-propenoate

Abstract  The title compound, C₁₆H₂₂O₄, synthesized by modified Knoevenagel condensation of protocatechualdehyde with monoheptyl-malonate and recrystallized from benzene, was confirmed by single-crystal X-ray diffraction (CCDC 272827). The compound crystallizes in triclinic space group Pī with cell parameters a = 5.296(3) ?, b = 10.711(13) ?, c = 13.870(4) ?, α = 98.84(7)°, β = 90.97(4)°, γ = 96.77(7)° and Z = 2. The structure is the E isomer and its packing is stabilized by intermolecular O–H···O and C–H···O hydrogen bonds. Index Abstract  The title compound, C₁₆H₂₂O₄, synthesized by modified Knoevenagel condensation, was confirmed by single-crystal X-ray diffraction showing its structure is in E isomer and its packing is stabilized by hydrogen bonds.      

Crystal of Tetrakis(1-ethyl-1H-imidazole)diisothiocyanatocopper(II) bis(1-ethyl-1H-imidazole)diisothiocyanatocopper(II)

Abstract  A new complex [Cu(NCS)₄ (N-Eim)₄] [Cu(NCS)₂ (N-Eim)₂] (where N-Eim = N-ethylimidazole) has been synthesized and structurally characterized by single-crystal X-ray diffraction. The compound crystallizes in the Triclinic space group P−1 with the parameters: a = 8.7707(18) ?, b = 10.712(2) ?, c = 13.511(3) ?, α = 104.73(3)°, β = 104.84(3)°, γ = 102.52(3)°, V = 1131.54(3) ?³, with Z = 1 formula units. In the structure, the copper atoms all assume an elongated octahedral geometry with two distinct coordination environments; one is coordinated by four N-ethyl-imidazole ligands and two axial SCN groups, and another by two SCN groups and two N-ethyl-imidazole ligands. The two units form one infinite 1D zigzag chain along the [1 0 1] plane by two thiocyanate ligands from the [Cu(NCS)₄ (N-Eim)₄] units. Index Abstract  The title compound, tetrakis(1-ethyl-1H-imidazole)diisothio cyanatocopper(II) bis(1-ethyl-1H-imidazole)diisothiocyanatocopper(II) has been synthesized and structurally characterized by single-crystal X-ray diffraction. In the structure, the copper atoms all assume an elongated octahedral geometry with two distinct coordination environments. The two units form one infinite 1D zigzag chain along the [1 0 1] plane by two thiocyanate ligands from the [Cu(NCS)₄ (N-Eim) 4] units.      

The Preparation, Characterization and X-ray Structural Analysis of Tetrakis[1-Methyl-3-(2-Propyl)-2(3H)-Imidazolethione]Cadmium(II) Hexafluorophosphate

Abstract  A new compound, [Cd(mipit)₄][PF₆]₂ has been synthesized and characterized via standard solid and solution state methods including single crystal X-ray crystallography (mipit = 1-methyl-3-(2-propyl)-2(3H)-imidazolethione). The title compound crystallizes in tetragonal space group I4 ₁ /a with a = 12.478(2) ?, b = 12.478(2) ?, c = 28.806(6) ?, and Z = 4. The complex is a high melting, colorless solid that has a distorted tetrahedral CdS₄ coordination geometry. Thermogravimetric analysis results for the title compound as well as for another potential CdS synthon and two potential CdSe synthons are reported. Graphical Abstract  The synthesis and characterization of the title compound, a new ionic homoleptic cadmium complex, tetrakis[1-methyl-3-(2-propyl)-2(3H)-imidazolethione]cadmium(II) hexafluorophosphate is reported. The results of a single crystal X-ray diffraction analysis reveal a distorted tetrahedral CdS₄ coordination sphere about the cadmium. Electronic supplementary material  The online version of this article (doi:) contains supplementary material, which is available to authorized users.     

Crystal Structure of the Tunnel-like Supramolecular Complex: Methylviologen(2+) Octaaquaoxalatodiiron(II) Disulfate

Abstract  The 3D supramolecular complex, (C₁₂H₁₄N₂)[Fe(II)₂(C₂O₄)(OH₂)₈] · 2(SO₄)²⁻, is monoclinic, P2₁/n, with the following cell parameters: a = 8.0413(16) ?, b = 17.272(4) ?, c = 9.806(2) ?, β = 106.25(3)°, V = 1307.6(5) ?³, Z = 2, R ₁ = 0.0344, and wR ₂ = 0.0763. X-ray crystallography revealed that the structure can be regarded as a hydrogen-bonded tunnel-like supramolecule with the methylviologen lying in the tunnel as the charge compensating cation. The multiple intermolecular hydrogen bonds between the octaaquaoxalatodiiron cations and the isolated sulfate ions link the supramolecular complex into a quasi-three-dimensional open-framework structure. Graphical Abstract  Crystal Structure of the Tunnel-like Supramolecular Complex: Methylviologen(2+) Octaaquaoxalatodiiron(II) Disulfate Xin Yang, Jiang Li, Shenyi Shi, Yawei Hou and Yongkui Shan A hydrogen-bonded tunnel-like supramolecular structure with the methylviologen lying in the tunnel as the charge compensating cation has been synthesized for the first time.      

Synthesis, Crystal Structures and Properties of Two Copper (II) Complexes with Pyridazine Derivative Ligand

Abstract  Two new complexes, [Cu(L)₂(CH₃OH)] · (ClO₄)₂ (1) and [Cu(L)₂(H₂O)] · (NO₃)₂ (2), have been synthesized and their crystal structures have been determined by X-ray analysis, where L = 3-(3,5-bimethylpyrazole-yl)-6-chloro-pyridazine]. The complex 1 crystallizes in the monoclinic, space group C2/c, and the coordination configuration of copper (II) is better described as trigonal pyramidal geometry with four N atoms from L and one O_methanol^. The coordination configuration of 2 is quite similar to that of 1 except O_water instead of O_methanol^. The intermolecular hydrogen bonds link the repeat units and extend the molecules to multinuclear structures in both compounds. The spectral properties of the title compounds have been studied and discussed. Furthermore, the antibacterial activities of the title compounds have been detected, the results indicate that the ligands and two copper(II) complexes exhibit certain fungicidal activities again several bacteria. Index Abstract  Two new complexes, [Cu(L)2(CH3OH)]·(ClO4)2 (1) and [Cu(L)2(H2O)]·(NO3)2 (2), have been synthesized and their crystal structures have been determined by X-ray analysis, where L= 3-(3,5-bimethylpyrazole-yl)-6-chloro-pyridazine. The intermolecular hydrogen bonds extend the molecules to multinuclear structures in both compounds.