Synthesis and Crystal Structure of Bis{2-bromo- 4-chloro-6-[（2-isopropylammonioethylimino）- methyl]phenolato}bisthiocyanatozinc（Ⅱ）

A Schiff base zinc(Ⅱ) complex [Zn(C12H16BrClN2O)2(NCS)2] was prepared and characterized by elemental analysis,IR and single-crystal X-ray diffraction. The crystal belongs to the triclinic system,space group P1 with a=8.414(1),b=9.124(1),c=22.212(3),α=79.177(2),β=86.296(2),γ=89.899(2)o,V=1671.3(4)3,Z=2,Dc=1.631 g/cm3,Mr=820.79,λ(MoKα)= 0.71073,μ=3.444 mm-1,F(000)=824,R=0.0646 and wR=0.1179. A total of 7371 unique reflections were collected,of which 3904 with I > 2σ(I) were observed. The complex crystallizes with two half-molecules per asymmetric unit and each mononuclear molecule is centrosymmetric. The Zn atom lying at the inversion centre is six-coordinated in a slightly distorted octahedral geometry by two phenolate O atoms and two imine N atoms from two Schiff base ligands,as well as two N atoms from two thiocyanate anions. In the crystal structure,the combination of π-π stacking interactions and intermolecular hydrogen bonds (N–H…Br,N–H…O,N–H…N,C–H…O,C–H…S and C–H…Cl) leads to a three-dimensional network.     

Synthesis,Crystal Structure,and Cytotoxic Property of Dibromobis{4-bromo-2-[(2-phenylaminoethylimino)methyl]phenolato}dizinc(Ⅱ)

The title phenolic oxygen bridged dinuclear Schiff base zinc(Ⅱ)complex [Zn2Br2-(C15H14BrN2O)2]was synthesized and characterized by elemental analysis and single-crystal X-ray diffraction.The crystal belongs to the trielinic system,space group P-1 with a=9.2279(17),b=12.096(2),c=16.286(3)(A),α=75.402(3),β=87.464(3),γ=72.746(3)°,V=1679.1(5)(A)3,Z=2,Dc=1.833 g/cm3,Mr=926.94,λ(MoKα)=0.71073(A),μ=6.221 mm-1,F(000)=904,the final R=0.0601 and wR=0.1155.A total of 7453 unique reflections were collected,of which 3425 with Ⅰ＞2σ(Ⅰ)were observed.One Zn atom is six-coordinate in an octahedral geometry,and the other one is four-coordinate in atetrahedral geometry.The Zn…Zn distance is 3.106(2) (A).In the crystal structure,molecules are linked through intermolecular hydrogen bonds typed N-H…Br and C-H…Br,forming zigzag chains running along the b axis.The complex shows potent cytotoxic property to both normal and cardnoma cells.     

Synthesis and Crystal Structure of Diaquabis{2,4-dibromo-6-[(2-ethylaminoethylimino)methyl]phenolato}nickel(Ⅱ) Dinitrate Diacetonitrile

The title mononuclear Schiff base nickel(Ⅱ) complex [Ni(C11H14Br2N2O)2(H2O)2]·2NO3·2C2H3N was prepared and characterized by elemental analysis, IR spectrum, and single-crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group P21/n with a = 15.534(2), b = 7.647(1), c = 16.435(2) (A), β = 103.252(2)o, V = 1900.3(4) (A)3, Z = 2, Dc = 1.750 g/cm3, Mr = 1000.99, λ(MoKα) = 0.71073 (A), μ = 4.776 mm-1, F(000) = 996, the final R = 0.0368 and wR = 0.0724. A total of 3988 unique reflections were collected, of which 2764 with I＞2σ(I) were observed. The complex consists of a mononuclear [Ni(C11H14Br2N2O)2(H2O)2]2 cation, two nitrate anions and two acetonitrile molecules. The Ni atom, lying on the inversion centre, is six- coordinated by two Schiff bases and two water molecules to assume an octahedral coordination geometry. The molecules in the crystal are linked through intermolecular hydrogen bonds of N-H…O, N-H…Br, O-H…O, O-H…N and C-H…O to form layers.     

Synthesis and Crystal Structure of 2,4-Diiodo-6-[(2-morpholin-4-yl-ethylimino)-methyl]-phenol-copper(Ⅱ)

2,4-Diiodo-6-[(2-morpholin-4-yl-ethylimino)-methyl]-phenol-copper(Ⅱ) has been designed and synthesized.The structure was determined by UV,IR and single-crystal X-ray study.The title complex crystallizes in the triclinic system,space group P1 with a=6.6090(13),b=10.377(2),c=12.550(3),α=113.29(3),β=93.84(3),γ=98.31(3)°,V=774.9(3)3,Dc=2.215g/cm3,C26H30CuO4N4I4,Mr=1033.68,F(000)=487,μ=4.726 mm-1,Z=1,the final R=0.0563 and wR=0.1475 for 2101 observed reflections(I2σ(I)).The central copper(Ⅱ) is four-coordinated by two nitrogen atoms and two oxygen atoms from two 3,5-diiodosalicylaldehyde-2-morpholinoethylamine Schiff bases.The complex is linked into a column by π-π stacking interaction.The complex was assayed for antibacterial activities against three Gram positive bacterial strains(B.subtilis,S.aureus and S.faecalis) and three Gram negative bacterial strains(E.coli,P.aeruginosa and E.cloacae) by MTT method.Fortunately,the title complex shows potent antibacterial activity against these six bacterial strains.     

Synthesis and Crystal Structure of Diaquabis{2,4-dibromo-6-[(2-ethylaminoethylimino)methyl]-phenolato}nickel(Ⅱ) Dinitrate Diacetonitrile

The title mononuclear Schiff base nickel(Ⅱ) complex [Ni(C11H14Br2N2O)2(H2O)2]· 2NO3·2C2H3N was prepared and characterized by elemental analysis,IR spectrum,and single-crystal X-ray diffraction. The crystal belongs to the monoclinic system,space group P21/n with a=15.534(2),b=7.647(1),c=16.435(2),β=103.252(2)o,V=1900.3(4)3,Z=2,Dc=1.750 g/cm3,Mr=1000.99,λ(MoKα)=0.71073,μ=4.776 mm-1,F(000)=996,the final R=0.0368 and wR=0.0724. A total of 3988 unique reflections were collected,of which 2764 with I > 2σ(I) were observed. The complex consists of a mononuclear [Ni(C11H14Br2N2O)2(H2O)2]2+ cation,two nitrate anions and two acetonitrile molecules. The Ni atom,lying on the inversion centre,is six-coordinated by two Schiff bases and two water molecules to assume an octahedral coordination geometry. The molecules in the crystal are linked through intermolecular hydrogen bonds of N–H…O,N–H…Br,O–H…O,O–H…N and C–H…O to form layers.     

Synthesis,Crystal Structure,and Cytotoxic Property of Dibromobis{4-bromo-2-[（2- phenylaminoethylimino）methyl]phenolato}dizinc（II）

The title phenolic oxygen bridged dinuclear Schiff base zinc（II） complex [Zn2Br2- （C15H14BrN2O）2] was synthesized and characterized by elemental analysis and single-crystal X-ray diffraction. The crystal belongs to the triclinic system, space group P1 with a = 9.2279（17）, b = 12.096（2）, c = 16.286（3） A, α = 75.402（3）, β = 87.464（3）, γ= 72.746（3）°, V = 1679.1（5） A^3, Z = 2, Dc = 1.833 g/cm^3, Mr = 926.94, λ（MoKα） = 0.71073 A, μ= 6.221 mm^-1, F（000） = 904, the final R = 0.0601 and wR = 0.1155. A total of 7453 unique reflections were collected, of which 3425 with I 〉 2σ（I） were observed. One Zn atom is six-coordinate in an octahedral geometry, and the other one is four-coordinate in a tetrahedral geometry. The Zn...Zn distance is 3.106（2） A. In the crystal structure, molecules are linked through intermolecular hydrogen bonds typed N-H...Br and C-H...Br, forming zigzag chains running along the b axis. The complex shows potent cytotoxic property to both normal and carcinoma cells.     

Synthesis and Crystal Structure of Bis-{N-[2-(6-ethylpyridyl)]-salicylideneiminato} Cobalt(Ⅱ)

1 INTRODUCTION The Schiff bases derived from salicylaldehyde and 2-aminopyridine derivatives have been used as potentially terdentate ligands[1]. Yamada and Yam- anouchi have synthesized the type of ML2nH2O complexes (M = CoⅡ, NiⅡ, CuⅡ, ZnⅡ or PdⅡ)[     

Synthesis and Crystal Structure of Bis-{N-[2-(6-ethylpyridyl)]-salicylideneiminato} Cobalt(Ⅱ)

The title complex 1, C28H26CoN4O2, crystallizes in the triclinic system, space group P-1 with a = 9.506(3), b = 9.506(3), c = 14.837(5) A, α = 106.397(5), β = 106.012(5), γ =91.889(6)°, V = 1217.7(7) A3, Z = 2, Dc=1.390 g/cm3, Mr= 509.46, F(000) = 530,μ(MoKα) =0.738 mm-1, the final R = 0.0359 and wR = 0.0951 for 4275 observed reflections with I ＞ 2σ(I).The complex adopts a distorted tetrahedral coordination sphere around the cobalt atom.     

Synthesis and Structure of Di(μ-Ophenoxy)-bis{nitrato-2-[2-(hydroxyethylimino)-methyl]-phenoloimidazolecopper}

The crystal structure of di(-O_phenoxy)-bis{nitrato-2-[2-(hydroxyethylimino)-methyl]-phenoloimid-azolecopper} was determined. The crystals are monoclinic: a = 10.222(2) Å, b = 13.810(3) Å, c = 10.620(2) Å, =103.67(3)°, space group P2₁/n, Z = 2, R = 0.050. The copper atom coordinates the singly deprotonated 2-[2-(hydroxyethylimino)-methyl]-phenol molecule, imidazole, and nitrate ion. The coordination polyhedron of the central atom is an extended tetragonal bipyramid with imine and imidazole nitrogen atoms and phenol and alcohol oxygen atoms lying in its base. One axial vertex of the bipyramid is occupied by the oxygen atom of the nitrato group and the other vertex, by phenol oxygen atom of the neighboring complex joined with the initial complex by the symmetry center. Two bridging phenol oxygen atoms unite the complexes into a centrosymmetrical dimer.     

Synthesis and Crystal Structure of Bis[α-chloro-(o-chloro-benzylidene)] Hydrazine

The title compound bis[α-chloro-(o-chloro-benzylidene) hydrazine] (C14H8Cl4N2, Mr = 346.02) has been prepared, and its crystal structure was determined by single-crystal X-ray diffraction. The crystal is of monoclinic, space group P21/n with a = 10.777(2), b = 6.456(2), c = 10.988(3) A, β = 90.48(2)o, V = 764.5(3) A3, Z = 2, Dc = 1.503 g/cm3, F(000) = 348 and μ(MoKα) = 0.763 mm-1 (λ = 0.71073 A). The structure was refined to R = 0.0793 and wR = 0.2398 for 1694 observed reflections with I > 2σ(I). The results of crystal structure determination show that both C(7) and C(7)a are of sp2 hybridization and there exists electronic conjugation in the aza-diene of -C=N-N=C.     

Synthesis and Crystal Structure of Diaquabis{2,4- dibromo-6-[（2-ethylaminoethylimino）methyl]- phenolato}nickel（II） Dinitrate Diacetonitrile

The title mononuclear Schiff base nickel(Ⅱ) complex [Ni(C11H14Br2N2O)2(H2O)2]·2NO3·2C2H3N was prepared and characterized by elemental analysis, IR spectrum, and single-crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group P21/n with a = 15.534(2), b = 7.647(1), c = 16.435(2) (A), β = 103.252(2)o, V = 1900.3(4) (A)3, Z = 2, Dc = 1.750 g/cm3, Mr = 1000.99, λ(MoKα) = 0.71073 (A), μ = 4.776 mm-1, F(000) = 996, the final R = 0.0368 and wR = 0.0724. A total of 3988 unique reflections were collected, of which 2764 with I＞2σ(I) were observed. The complex consists of a mononuclear [Ni(C11H14Br2N2O)2(H2O)2]2 cation, two nitrate anions and two acetonitrile molecules. The Ni atom, lying on the inversion centre, is six- coordinated by two Schiff bases and two water molecules to assume an octahedral coordination geometry. The molecules in the crystal are linked through intermolecular hydrogen bonds of N-H…O, N-H…Br, O-H…O, O-H…N and C-H…O to form layers.     

Synthesis and Crystal Structure of Bis[2-[2-(diethylamino)ethyliminomethyl]-4-nitrophenolato]dimethanolcobalt(II) Dinitrate

1 INTRODUCTION The significance of cobalt coordination com- pounds in biological systems is recognized[1～3]. In many instances the cobalt coordination compounds of Schiff bases have been suggested as models to describe energy transfer in naturally occurring systems. In such cases the coordination sphere about the metal ion is believed to play an important role in determining the nature of the model system[4, 5]. In order to investigate the structures of such complexes, we report herein t…     

Synthesis and Crystal Structure of 2,3,4,6-Tetra-O-acetyl-1-{2-[(4-nitrophenoxy)methyl]-1,3,4-thiadiazole-5-thione-4-yl}-1-deoxy-β-D-glucopyranose

The title compound has been synthesized and its crystal structure was determined by single-crystal X-ray diffraction.The crystal is of orthorhombic system (C23H25N3O12S2,Mr=599.58),space group P212121 with a=6.2102(12),b=17.803(4),c=24.223(5),V=2678.0(9)3,Z=4,Dc=1.487 g/cm3,F(000)=1248,μ=0.268 mm-1,the final R=0.0483 and wR=0.1108 for 4174 observed reflections (I 2σ(I)).The C=S bond,which parallels to the anomeric C-H,adopts α orientation relative to the anomeric position of glucopyranoside.     

Synthesis,Structure and Catalytic Activity of a Palladium(Ⅱ) Complex Based on 4-Chloro-2-[(6-methyl-pyridin-2-ylimino)-methyl]-phenol Ligand

The title complex bis{4-chloro-2-[(6-methyl-pyridin-2-ylimino)-methyl]-phenol}-palladium(Ⅱ)(C_(26)H_(20)Cl_2N_4O_2Pd) has been synthesized by the reaction of 4-chloro-2-[(6-methylpyridin- 2-ylimino)-methyl]-phenol with Pd(CH_3COO)_2, and characterized by IR spectrum and elemental analysis. Single-crystal X-ray diffraction analysis results further confirmed the molecular structures. The crystal belongs to the monoclinic system, space group P2_1/c with a = 4.1324(2), b = 23.5432(16), c = 11.8943(8) ?, β = 91.238(5)o, V = 1156.93(12) ?~3, C_(26)H_(20)Cl_2N_4O_2Pd, M_r = 597.76, Z = 2, D_c = 1.716 g/cm~3, μ = 1.067 mm~(-1), F(000) = 600, the final R = 0.0247 and w R = 0.0677(I 2σ(I)). In the presence of methylaluminoxane(MAO), the complex exhibits excellent catalytic activities(1.737×10~7 g of PNB(mol of Pd)~(-1)·h~(-1)) in the vinyl polymerization of norbornene.     

Synthesis and Crystal Structure of Bis[(2,6-pyridinedicarboxylato)(methanol)dibenzyltin(IV)]

ＩｎｔｒｏｄｕｃｔｉｏｎＤｉｏｒｇａｎｏｔｉｎｄｅｒｉｖａｔｉｖｅｓｏｆ 2 ,6 ｐｙｒｉｄｉｎｅｄｉｃａｒｂｏｘｙｌｉｃａｃｉｄｅｘｈｉｂｉｔｈｉｇｈｉｎｖｉｔｒｏａｎｔｉｔｕｍｏｕｒａｃｔｉｖｉｔｉｅｓ .1 5Ｔｈｅｓｅｃｏｍｐｏｕｎｄｓｈａｖｅｂｅｅｎｓｙｎｔｈｅｓｉｚｅｄｂｙｔｈｅｒｅａｃｔｉｏｎｏｆｄｉｏｒｇａｎｏｔｉｎｄｉｃｈｌｏｒｉｄｅｓｏｒｄｉｏｒｇａｎｏｔｉｎｏｘｉｄｅｓｗｉｔｈ 2 ,6 ｐｙｒｉｄｉｎｅｄｉｃａｒｂｏｘｙｌｉｃａｃｉｄ ,ｂｕｔｔｈｅｒｅａｃｔｉｏｎｂｅｔｗｅｅｎｔｒｉ …     

Microwave Synthesis and Crystal Structure of Bis {2- [（2,4-dichloro-phenylimino）- methyl]-4,6-diiodo-phenol}-copper（II）

Bis{2-[(2,4-dichloro-phenylimino)-methyl]-4,6-diiodo-phenol}-copper(II) (1) has been synthesized and its structure determined by X-ray diffraction. It crystallizes in the monoclinic system, space group P2 1 /n with a=14.7558(17), b=20.770(2), c=20.3260(19) , β=90.6110(10)°, V=6229.2(11) 3 and Z=8. The Cu atom is surrounded by two O atoms and two N atoms from two 2-[(2,4-dichloro-phenylimino)-methyl]-4,6-diiodo-phenol molecules to form a tetrahedral coordination environment. The complex is linked into a column by weak intermolecular interactions.     

Synthesis and Crystal Structure of Bis[O, O '-bis(4-tert-butylphenyl)dithiophosphate] nic kel(Ⅱ)

A new O,O'-bis(4-tert-butylphenyl)dithiophosphate complex Ni[SSP(OC6H4But- p)2]2 (1) was synthesized and characterized by elemental analysis, IR, 1H NMR, thermogravimetric analysis (TGA) and single-crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group P21/c with a = 12.8440(3), b = 6.18686(12), c=26.3018(5) , β=92.6135(18)°, V = 2087.87(7) 3, Z = 2, Dc = 1.345 g/cm3, μ = 0.780 mm-1, the final R = 0.0316 and wR = 0.0748 (Ⅰ >2σ(Ⅰ)). A total of 4269 unique reflections were collected, of which 3621 with Ⅰ > 2σ(Ⅰ) were observed. The NiII atom lies on an inversion center and is chelated by two (p-ButC6H4O)2PSS-ligands in a [NiS4] square-planar geometry with Ni-S bonds of 2.2408(5) and 2.2444(5) , respectively. A stepwise 1D chain structure is constructed via intermolecular S…S and C-H…S interactions. According to our knowledge this is the first case that intermolecular S…S interaction is observed in mononuclear transition metal complex of O,O'-dialkyldithiophosphates.     

Synthesis and Crystal Structure of Bis(S-methyl-β-N- (4-dimethylaminophenyl)methlenedithiocarbazate) Nickel (Ⅱ)

11NTRoDUCT1ONRecently,transitionmetalorganometallicandcoordinationcomplexeshavee-mergedaspotentialbuildingblocksfornonlinearoptical(NLO)materials(l-5i.Com-paredwlthorganlcmolecu1es,metalcomplexesofferalargervarietyofstructures,comparabIeor,insomecases,higherenvironmenta1stabilityandamuchgreaterdi-versityoftunableelectronicpropertiesbythevirtueofthecoordinatedmetalcen-tert6i.Thethio-Schiffbaseligandderivedfromdithiocarbazatesandthiosemicar-bazidescancoordinatereadilywithtransitionmetalstog…