Synthesis, Crystal Structure and Optical Properties of a New Nd(III) Nitronyl Nitroxide Complex [Nd(NIT2Py)_2(NO_3)_3]

1 INTRODUCTION Nitronyl nitroxides, independently or in combina- tion with metal ions, have been one of the most widely studied systems in molecular magnetism for understanding the radical-radical or metal-radical interactions as well as for synthesizing organic ferro- magnets and metal-radical magnetic materials[1～3]. Meanwhile, investigations on molecular coordina- tion compounds of lanthanide ions have also attrac- ted great attention due to their luminescence[4, 5] or magnetic propert…     

Syntheses of Binuclear Copper(I) Complexes Containing Benzimidazole

1 INTRODUCTION Procedures to synthesize copper(I) complexes are of great interest due to the diversity of products resulting from almost the same methodology. It has been long known that four-electron-donordipho- sphine compounds Ph2P(CH2)nPPh2 are excellent bi- dentate ligands[1, 2]. The chelating tendency of bis- (diphenylphosphino) methane is one of the dipho- sphine ligands most suitable to lock two metal atoms together in close proximity[3]. Many examples of bi- or polynuclear com…     

2，3，6，3′，4′-五氧乙酰基蔗糖的合成与表征

三氯蔗糖;6-pas;合成;高效液相色谱     

Crystal Structure of D-Valine at the Temperature of 293, 270, 223 and 173K

1 INTRODUCTION D-amino acids are universally present and play different biological roles in various organisms in- cluding those in the human body. Milton[1] has shown that the D and L forms of the enzyme HIV-1 protease were equally affected by the achiral inhi- bitor but displayed reciprocal chiral specificity in their biochemical interactions. D-proteins may also be nonimmunogenic. Senility and some diseases are related to D-amino acids, such as renal disease[2], Alzheimer disease[3…     

Synthesis and Crystal Structure of 9-Pyridyl-1,8-dioxo-2,3,4,5,6,7-hexahydroxanthene

1 INTRODUCTION The Koevenagel condensation catalyzed by bases or Lewis acid has been the subject of many synthetic applications since its discovery[1] although the pre- sence of catalyst is not always indispensable[2]. Mo- reover, the reaction of aromatic aldehyde with 1,3- cyclohexanedione under different conditions afforded different products[3～6]. In continuing efforts for the application of 1,3-cyclohexanedione derivatives to construct new heterocycles with biological activi- ties[7…     

A Novel Platinum（Ⅳ） Halide Anion as Ethyl-triphenylphosphenonium Salt： Synthetic, Structural and Theoretical Study

1 INTRODUCTION The importance of metal ions in nucleic acid and other biologic processes has stimulated considerable research interest in the area of metal interactions with nuclei acid constituents[1, 2] due to the discovery that some platinum compounds, especially cis-Pt (NH3)2- Cl2, exhibit carcinostatic properties[3]. This has led to an increased research activity in the chemistry and structures of platinum complexes containing novel or- ganic ligands. And crystal engineering has its…     

Structural and Spectroscopic Properties of Linear Carbon Chains NC2nN and HC2n＋1N （n = 1- 10）

1 INTRODUCTION Carbon-chain species are widely present in the interstellar medium as possible carriers of the diffuse interstellar bands. They play an important role in diverse chemical processes and nanoscience as intermediates and building units. Because of their high reactivity, bare carbon chains are readily termi- nated by a wide variety of atoms, forming XCn or XCnX linear clusters[1]. During the past decade, lots of theoretical spectra of different carbon chain systems have been …     

Hydrothermal Assembly and Structural Characterization of a Novel 3D Coordination Polymer: [Cd_2Zn(BTC)_2(H_2O)_4]_n·2nH_2O

1INTRODUCTIONThehydrothermalsynthesisofmetalsaltsofaro-maticpolycarboxylicacidisattractinginterestinthefieldofcrystalengineeringasaconsequenceoftheirnovelstructuresandpropertiessuchasporosityandmagneticinteractionsbetweenparamagneticmetal-ions[1~7].1,3,5-Benzenetricarboxylicacid(H3-BTC)hasreceivedconsiderableattentionasatridentatearomaticpolycarboxylicligandcapableofformingcoordinationpolymers.Manyscientistshavesuc-ceededinsynthesizingvarietyofporouscoordina-tionpolymerswithhighdimension…     

N-(1, 3, 4-噻二唑-2-基)-N′-芳酰基脲的合成及其生物活性

N-(1;3;4-噻二唑-2-基)-N′-芳酰基脲的合成及其生物活性;噻二唑;芳酰基脲;合成;生物活性;植物生长调节剂     

QSPR Studies on lgK_(ow) and lgK_(oc) of Fluorobenzenes and Property Parameters Based on HF and DFT Calculations

1 INTRODUCTION Quantitative structure-activity relationship (QSAR) equation could be employed to predict the biological activities of unknown compounds, which is signifi- cant for initial screening and evaluation of toxic compounds[1]. Soil sorption coeff…