A Facile Approach to Synthesis of the Di-O-methyl Ethers of （-）-Agatharesinol, （-）-Sugiresinol, （＋）-Nyasol and （＋）-Tetrahydronyasol

The facile enantioselective synthesis of the di-O-methyl ethers of （-）-agatharesinol （1b）, （-）-sugiresionl （2b）, （＋）-nyasol （3b） and （＋）-tetrahydronyasol （4） were achieved in high yield. The absolute configuration of （＋）-3a was confirmed via first total synthesis of （＋）-3b and （＋）-4.     

Adsorption Site and State of Nitrogen Atom on Ru（0001）, （1010） Low-index and （1120）, （1121） Stepped Surfaces

The adsorptions of nitrogen atoms on Ru(0001), (1010) low index surfaces and (1120), (1121) stepped surfaces were investigated by the five-parameter Morse potential(5-MP) method in details. Calculated results demonstrate that N atoms show a tendency to be adsorbed at threefold sites. No subsurface state was found for N atoms on Ru(1010) surface. There exist 6 stable adsorption sites for N atoms on Ru(1121) stepped surface which can be classified into 3 types: the on-surface adsorption state, the facet adsor...     

Synthesis,Crystal Structure,and Properties of Inorganic-organic Hybrid M（Ⅱ）-Nb（V） （M=Co,Cu） Oxyfluorides

Two isostructural inorganic-organic hybrid M(II)–Nb(V) oxyfluorides, namely, M(H2O)2(pyz)NbOF5 (M=Co 1, Cu 2; pyz=pyrazine) have been hydrothermally synthesized and structurally characterized. Both compounds possess two-dimensional layer structure constructed by neutral M(H2O)2NbOF5 chains inter-connected via bridging pyrazine ligands. The structure is further extended into three-dimensional supramolecular architecture through inter-layer H-bonding interactions between the coordinated water molecules and fluorine ions. The luminescent properties and thermal stability of both compounds have been investigated.     

Syntheses,Spectral Characterization of the Nickel（ Ⅱ）Compplexes of

１ＩＮＴＲＯＤＵＣＴＩＯＮＭａｃｒｏｃｙｃｌｉｃｄｉｏｘｏｔｅｔｒａｍｉｎｅｓｗｉｔｈｖａｒｉｏｕｓｆｕｎｃｔｉｏｎａｌｐｅｎｄａｎｔｓｈａｖｅｒｅｃｅｉｖｅｄｍｕｃｈａｔｔｅｎｔｉｏｎ，ｔｈｅｉｎｔｒｏｄｕｃｔｉｏｎｏｆｖａｒｉｏｕｓａｄｄｉｔｉ...     

Simple,Selective, and Sensitive Spectrophotometric Method for Determination of Trace Amounts of Nickel（Ⅱ）, Copper （Ⅱ）, Cobalt （Ⅱ）, and Iron （Ⅲ） with a Novel Reagent 2-Pyridine Carboxaldehyde Isonicotinyl Hydrazone

A selective and sensitive reagent of 2-pyridine carboxaldehyde isonicotinyl hydrazone（2-PYAINH） was synthesized and studied for the spectrophotometric determination of nickel, copper, cobalt, and iron in detail. At a pH value of 7.0, 9,0, 9.0, and 8.0, respectively, which greatly increased the selectivity; nickel, copper, cobalt, and iron reacted with 2-PYAINH to form a 1：2 yellow-orange, 1：2 yellow-green, 1：2 yellow and 1：1 yellow complexes, with absorption peaks at 363, 352, 346, and 359 nm, respectively. Under the optimal conditions, Beer＇s law was obeyed over the ranges of 0.01-1.4, 0.01-1.5, 0.01-2.7, and 0.01-5.4 mg/L respectively. The apparent molar absorptivity and Sandell＇s sensitivities were 8.4×10^4, 5.2×10^4, 7.1×10^4, and 3.9×10^4 L·mol^-l·cm^-1, respectively, and 0.00069, 0.0012, 0.00078, and 0.0014 μg·cm2, respectively. The detection limits were found to be 0.001, 0.002, 0.003, and 0.01 mg/L, respectively. The detailed study of various interfering ions to make the method more sensitive was carried out and selective and several real samples were analyzed with satisfactory results.     

Asymmetric Synthesis of （ － ）－（2R ,3R, 6S ）－Irnigaine

Asymmetric synthesis of irnigaine was achieved starting from an enantiopure β-amino ester 5 using the condensation of amino al-cohol 2 with acetylacetone and the subsequent intramolecular cycllzation as the key steps.     

Synthesis, characterization, photoluminescence and electroluminescence properties of new 1,3,4-oxadiazole-containing rhenium（I） complex Re（CO）3（Bphen）（PTOP）

A new 1,3,4-oxadiazole-contanining rhenium(I) complex,with the formula [Re(CO)_3(Bphen)(PTOP)],(Bphen=bathophe- nardine,PTOP=4-(5-p-tolyl-1,3,4-oxadiazd-2-yl)pyridine),is synthesized and characterized by elemental analysis,IR,~1H NMR, UV-vis and luminescence spectroscopy.The double-layer electroluminescence devices based on the Re(I) complex have been fabricated by spin-coating technique.The turn-on voltage,maximum efficiency,and brightness for green emission obtained from the devices are 9V,2.1cd/A and 165cd/m~2,respectively.     

Synthesis and Structure of Tetraploid （Imidazole） Copper（Ⅱ） Terephthalate, [Cu （Im） 4]（teph）

The crystal structure of [Cu (Im)₄] (teph) (Im = imidazole, teph = terephthalate) has been determined by X‐ray crystallography. It crystallizes in the triclinic system, space group Pī with cell dimensions of a = 0.80356 (16) nm, b = 0.84269 (17) run, c = 0.88967 (18) nm, α = 76.90 (3)°, β = 68.95 (3)°, γ = 75.94 (3)°, and Z = 1. Its structure of the title compound is composed of discrete monomelic molecule of [Cu (Im)₄]‐(teph). The copper (II) ions have a square plane geometry with the CuN₄ chromophore.     

Synthesis and Crystal Structure of Pd（ptac—C,N）（acac—O,O）

1INTRODUCTIONTherehasbeenconsiderableattentionfocusedonthestudyofpalladiumcomplexinorganicsynthesis,catalyticprocesses,chemicalreactivity,spectroscopyandstructuralanalysisandfunctionalmaterials[1].Manypalladacycleshavebeenappliedinthepreparationofliquid-crystallinecomplexes[2],andsomeofthemshowantitumoractivity.Theincreasingimportanceofsuchcyclo-organometalliccomplexleadsustoinvestigatethecyclicPdcomplexeswithenhancedchemicalandthermalstability,fromwhichdetailedspectroscopicandstructuralc…     

Synthesis, Characterization and Properties of Organotin Complexes Dibutyltin（Ⅳ） Bis（heteroaromatic carboxylate） and Crystal Structure of Dibutyltin（Ⅳ） Bis（2-thiazolylcarboxylate）

The six organotin complexes dibutyltin(IV) bis(heteroaromatic carboxylate) were synthesized by the reaction of (n‐Bu)2SnO with heteroaromatic carboxylic acid in 1:2 molar ratio. These complexes have been characterized by elemental analysis, IR, ¹H, ¹³C and ¹¹⁹Sn NMR. The crystal structure of dibutyltin(IV) bis(2‐thiazolylcarboxylate) was determined by X‐ray single crystal diffraction. This compound is a weakly bridged dimer through weak interaction Sn···O between molecules. The tin atoms took six‐coordinate skew‐trapezoidal bipyramidal geometry. The crystal of complex 3 belongs to monoclinic symmetry with space group P2₁/c, a=1.863(2) nm, b=2.220(3) nm, c=1.0395(10) nm, β=90.275(16)°, Z=8, V=4.292(8) nm³, D_c=1.514 Mg/m³, μ=1.406 mm^‐1, F(000)=1968, S=0.999, R=0.0549, wR=0.1011.     

Structure of Copper（Ⅱ）Bis（piperidyldithiocarbamate）

ＳｔｒｕｃｔｕｒｅｏｆＣｏｐｐｅｒ（Ⅱ）Ｂｉｓ（ｐｉｐｅｒｉｄｙｌｄｉｔｈｉｏｃａｒｂａｍａｔｅ）ＬａｎｇＪｉａｎ－ｐｉｎｇ；ＬｕＪｉａｎ－Ｍｅｉ；ＢｉａｎＧｕｏ－Ｑｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＳｕｚｈｏｕＵｎｉｖｅｒｓｉｔｙ...     

Synthesis, Crystal Structure and Nonisothermal Kinetics of Complex Co（tda）（5-mphen）（H2O）

The title complex,formulated as Co(tda)(5-mphen)(H2O)(H2tda=thiodiglycolic acid,5-mphen=5-methyl-1,10-phenanthroline),was synthesized and characterized by elemental analysis,IR spectroscopy,X-ray sin-gle crystal diffraction,and TG-DTG techniques. The complex crystallized in monoclinic space group C2/c,with parameters of a=1.8142(2) nm,b=0.78251(9) nm,c=2.4624(3) nm,β=93.809(2)°,V=3.4880(7) nm3,Z=8,Dc=1.579 g/cm3,the final R indices[I>2σ(I)] are R1=0.0469,wR2=0.1021,R indices for all data are R1=0.0835,wR2=0...     

Syntheses,Crystal Structures and Thermal Properties of Two Dicadmiun（Ⅱ） Complexes CdeLeX2 （HL = N-（3-Methoxylsalicylidene）-3- dimethylaminopropylamine,X = Cl （1）, NCS （2））

Two Cd（Ⅱ） complexes, Cd2L2Cl2 （1） and Cd2L2（NCS）2 （2） （HL = N-（3-methoxylsalicylidene）-3-dimethylaminopropylamine） were synthesized and determined by EA, IR, TG and single-crystal X-ray diffraction. The crystallographic data are as follows： monoclinic, space group P21/n, a = 9.2710（9）, b = 18.0069（18）, c = 18.5562（19） A^°, β= 99.741（4）°, V = 3053.1（5）, Z = 4,μ = 1.605, F（000） = 1536, R = 0.0264 and wR = 0.0699 for 1; orthorhombic, space group Pca21, a = 16.196（3）, b = 11.506（2）, c = 36.126（7） A^°, V = 6732（2）, Z = 8,μ = 1.428, F（000） = 3264, R = 0.0376 and wR = 0.0877 for 2. There are two geometrically different octahedral Cd（Ⅱ） atoms, with N4O2 and O4Cl2 donor sets for 1 while N4O2 and N2O4 for 2. In the dinuclear Cd（Ⅱ） centers, the Cd（Ⅱ） atoms are held together by two deprotonted phenolate oxygen atoms from tetradentate L^- ligands. The thermal gravity data show two step decompositions with the residues of CdO for two complexes.     

Structure and Stability of Endohedral Complexes X @（HAlNH）12 （X = He, Ne, Ar, Kr）

1 INTRODUCTION The structure and property of endohedral com- plexes X@An have been well represented, including Fullerene structures with bigger volume, such as Ln3 @C60[1], Sc3N@C80[2] and Sc3N@C78[3], or metal cluster complexes of Al(Al13-)[4] and Ga(Ga13-)[5] with relatively smaller volume. These studies have revealed much structure and property information, for example, the impact of building-in atom X on the cage structure, the interaction character of X-An in the cage, and the…     

Synthesis and Characterization of a Homochrial Manganese（Ⅱ）Complex Constructed from （1R,2R）-（-）-Diaminocyclohexane-N,N biscarboxyl-salicylidene）

A homochrial manganese(Ⅱ) complex derived from chiral salen ligand (1R,2R)-(-)diaminocyclohexane-N,N-biscarboxyl-salicylidene) (1) has been synthesized through solvothermal procedure and characterized by IR,elemental analysis,TGA,circular dichroism (CD),powder and single-crystal X-ray crystallography.It crystallizes in monoclinic,space group C2 with a=32.987(7),b=7.4662(15),c=17.931(4),β=97.82(3)°,V=4375.0(15) 3,Z=8,D c=1.544 g/cm 3,F(000)=2096,M r=508.36,μ=0.658 mm-1,the final GOOF=0.975,R=0.0676 and wR=0.2068 for 6357 observed reflections with I > 2σ(Ⅰ).The coordination polymer 1 possesses a 1D infinite zigzag chain architecture constructed by the dicarboxyl-functionalized metallosalen ligand (MnSalen),and the polymeric chains are further assembled into a 2D supramolecular network structure via strong intermolecular hydrogen bonding interactions between the adjacent zigzag chains.     

Lewis-base Adducts of Lead（Ⅱ）Compounds： Synthesis, Structure and Quantum Chemistry Calculafion of Mononuclear Pb（phen）（SCN）2

A mononuclear lead thiocyanate adduet Pb(phen)(SCN)2 (phen = 1,10phenanthroline) has been characterized by X-ray diffractometer, IR, UVVis spectra and susceptibility measurement. Structure analysis showed that the lead atom presents a unusual four-coordination geometry with a large vacancy, possibly indicating the stereochemical activity of 6s^2 lone pair electrons.     

Synthesis and Photoluminescence of a Novel Iridium Complex （BuPhOXD）2Ir（acac） with Unit of 1, 3, 4-Oxadiazole

A novel cyclometalated iridium complex with 1, 3, 4-oxadiazole moiety was synthesized and characterized. Its UV and photoluminescent properties were studied. The strong UV absorption intensity around 462 nm attributed to spin-forbidden triplet metal-ligand charge transfer band and photoluminescence at 518 nm were observed. This indicated that achieved iridium complex could be used as an efficient electrophosphorescent material.     

Synthesis, Crystal, Calculated Structure and Biological Activity of N-（（6-bromo-2-methoxyquinolin-3-yl）（phenyl） methyl）-N-（1-adamantyl）-3-（dimethylamino） Propanamide

The halogenated hydrocarbon amination reaction between the original raw material N-((6-bromo-2-methoxyquinolin-3-yl)(phenyl)methyl)-3-chloro-N-(1-adamantyl) propanamide and dimethylamine hydrochloride produces the target molecule N-((6-bromo-2-methoxyquinolin-3- yl)(phenyl)methyl)-N-(1-adamantyl)-3-(dimethylamino) propanamide (C32H38BrN3O2, Mr = 576.56), and its structure was confirmed by elemental analysis, IR, 1H NMR, MS, and X-ray diffraction. This crystal is of monoclinic system, space group P21/c with a = 10.760(5), b = 14.768(5), c = 19.635(5), β = 113.969(16)°, V = 2851.0(18)3, Z = 4, Dc = 1.343 g/cm3, F(000) = 1208, μ(MoKα) = 1.475 mm-1, the final R = 0.0645 and wR = 0.2039. In total, 4681 independent reflections including 3164 observed ones with I > 2σ(I) were collected. The dihedral angle between substituted quinolyl and phenyl is 64.0°. Through C-H···O, C-H···N and C-H···Br weak hydrogen bonds among molecules, the whole molecule is stacked into a three-dimensional structure. The optimized geometric bond lengths and bond angles obtained by using density functional theory (DFT) have been compared with X-ray diffraction values. In addition, the preliminary biological test showed that the title compound has anti-Mycobacterium phlei 1180 activity.