Syntheses and Structures of Lanthanide Complexes with Isonicotinate

1 INTRODUCTION In recent years, chemists have paid their attention to the design and construction of extended metal- organic framework solids with potential applications, such as catalysts, nonlinear optical devices, ion ex- change, adsorption, sensors etc.[1, 2]. As one kind of polydentate ligands, isonicotinic acid has been exte- nsively employed to synthesize transition metal coo- rdination polymers[3, 4] with one-[5～8], two-[9～12] and three- dimensional[13～21] extended frameworks b…     

Synthesis and Crystal Structure of a Dinuclear Cobalt(II) Complex [Co2(1H-benzimidazole)4(1,4-bdoa)2]

1 INTRODUCTION In the last decades, metal carboxylate complexes have become a particularly important subject in mo- dern coordination chemistry owing to their fascina- ting structural diversity and potential applications as functional materials[1～3]. The generation of supramo- lecular architectures relies on the combination of se- veral factors, such as the coordination geometry of metals, bonding of the ligands and reaction condi- tions[4, 5]. In relation to the ligands, the judicious c…     

Synthesis and Crystal Structure of N-methyl- 9- （4-bromophenyl）-1,2,3,4,5,6,7,8,9,10- decahydroacridine- 1,8-dione under Microwave Irradiation

1 INTRODUCTION Since the discovery of pharmacological effectsof 1,4-dihydropyridine (1,4-DHPs) as calcium mo-dulators[1], a great deal of work has been directedtowards the synthesis of 1,4-DHPs acting as cal-cium antagonists[2]. The chemical modifications onthe DHP ring, such as the introduction of differentsubstituents on heteroatoms[3], have allowed theexpansion of researches on structure-activity rela-tionship to have new insight into the molecularinteractions at the receptor l…     

Synthesis and Crystal Structure of 3-（ 2- Hydroxybenzly ）-4-（ 4- Hydro xybenzylideneamino ）-（1H） - 1,2,4- Triazole-5-Thione and Its Antibacterial Activities

1 INTRODUCTION 2. 1 Physical measurements Azole derivatives, such as pyrazole, imidazole, All solvent and chemicals were commercial rea- triazole(including benzotriazole), tetrazole and indole, gents and used without further purification. Ele- have extensive biological activities. They have be- mental analyses were performed on a PE 1700 CHN come the central focus of studies for agricultural che- auto elemental analyzer. IR spectra were recorded on micals, medicines, plant growth regul…     

Assignment of cis-Epoxides and Crystal Structure of cis-4-Nitro-N-（7-oxabicyclo[4.1.0]hept-2-yl）benzamide

1 INTRODUCTION The success of strategies for total synthesis con-tinues to depend on high levels of stereoselectivityobserved in substrate-directed diastereoselective re-actions[1]. In this context, one of the most widelyused processes is diastereoselective epoxidation ofcyclic alkenes with allylic O- and N-directing group,which is very useful in building stereodefined syn-thetic blocks[2, 3] .However, in some circumstances,the assignment of resulting epoxides is not straight-forward[4～8…     

Crystal and Molecular Structure of 4-Hydroxy-3-Methoxy-4-N-Methylstilbazonium Iodide C_(15) H_(16) NO_2 +·I~-CrystalandMolecularS

１　ＩＮＴＲＯＤＵＣＴＩＯＮＲｅｓｅａｒｃｈｏｎＳＨＧｅｆｆｅｃｔｈａｓｂｅｅｎｏｎａｒｅｍａｒｋａｂｌｅｐｏｓｉｔｉｏｎｉｎｏｒｇａｎｉｃｎｏｎｌｉｎｅａｒｏｐｔｉｃａｌ（ＮＬＯ）ｍａｔｅｒｉａｌｓｆｉｅｌｄ．Ｔｈｅｃｏｎｊｕｇａｔｅｄｄｅｌｏｃａｌｉｚｅｄπｅｌｅｃｔｒｏｎｓｐｏｓｓｉｂｌｙｒｅｓｕｌｔｉｎｔｈｅｓｅｃｏｎｄ－ｏｒｄｅｒＮＬＯｐｒｏｐｅｒｔｙｏｆｏｒｇａｎｉｃｃｏｍｐｏｕｎｄｓ,ｓｏａｎｕｍｂｅｒｏｆｎｉｔｒｏａｎｉｌｉｎｅｄｅｒｉｖａｔｉｖｅｓ,ｓｕｃｈａｓ２－ｍｅｔｈｙｌ…     

Scobidiynediol的合成及绝对构型

本文报道了以光学活性乳酸为手性元对目标化合物的所有可能的四个异构体所进行的合成。根据合成样品与天然产物的核磁及旋光数据比较，标题化合物的相对及绝对构型都得以完全确立，其完整结构定为(2S,3S)-4,6-庚二炔-2,3-二醇。     

SHOCK COMPRESSION BEHAVIOR OF BROMOFORM

ＳＨＯＣＫＣＯＭＰＲＥＳＳＩＯＮＢＥＨＡＶＩＯＲＯＦＢＲＯＭＯＦＯＲＭＰｅｎｇＳｈａｎｇｑｉａｎｇａ，ｂ，ｃＪｉｎｇＦｕｑｉａｎａ，ｂＨｕＪｉｎｂｉａｏａ，ｂＧｏｕＱｉｎｇｑｕａｎｂａ．ＬａｂｆｏｒＳｈｏｃｋＷａｖｅａｎｄＤｅｔｏｎａｔｉｏｎＰｈｙ...     

Revising Space Groups from Simulated SHELXfcf Structure Factors. More Examples of Incorrect Space Groups, an Example of a Chemically-Incorrect Structure and the Special Case of Pgl to PRevisions

1 INTRODUCTION Although the incorrect assignment of the space groups of crystal structures has been addressed in a number of reports, instances of crystal structures refined in incorrect symmetry turn up even in the recent literature[1～4]. A simple method of space group revision makes use of the published atomic coordinates and temperature factors to simulate the diffraction intensities; the structure is then 搒olved?in the correct space group from the simulated hkl-F2 data[5] and an O…