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1.
XU Jia Xi ZHANG Xin Yu JIN Sheng 《结构化学》1999,18(2)
1INTRODUCTIONInrecentyears,ithasfoundthatbenzothia/diazepinetricyclicderivativesarepo tentialpharmaceuticalagents〔12〕.Thus,we... 相似文献
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SUN Shu Qing WU Pei Ji ZHU Dao Ben 《结构化学》1999,18(2)
1INTRODUCTIONTheNi(dmit)2moleculesgiverisetoanumberofmolecularconductors〔1,2〕inadditiontosuperconductors〔3,4〕.Themultysulfurf... 相似文献
3.
1INTRODUCTIONBenzoheteroazepinecompoundsareimportantpharmaceuticalagents〔1,2〕.Inre centyears,ithasbeenfoundthatbenzoheteroaze... 相似文献
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1INTRODUCTIONSincebiologicalandphamacologicalactivitieshavebeenwel knownfornumerousheterocyclicaromatictricyclesinrecentyears... 相似文献
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1INTRODUCTIONRecentresearchonaseriesofdinuclearmolybdenum(0)carbonylcomplexescontain ingthiolato bridgeshasledtotheconclusion... 相似文献
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1 INTRODUCTIONInoureffortstodevelopthelow-valenceMo-SRcompounds,wehavefoundanMo(0)-compound,〔Mo2(SR)2(CO)8〕2-,whichisobtainedfromthereactionofMo(CO)6withRS-inhighyield,possessesaninterestingtwo-electrontransferproperty.Numerouskindsofdinuclearmolybde… 相似文献
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1INTRODUCTIONThechemistryofcompoundswithdmit(dmit=1,3 dithiole 2 thione 4,5 dithiolate)hasatractedconsiderableatentionrecentl... 相似文献
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1 INTRODUCTIONBiscyclopentadienyllanthanidechloridesforallthelanthanideelementshavebeensynthesizedandstructurallycharacterized〔1〕.Tert-butylcyclopentadienylisasuitableligandforpreparationoflanthanocenechlorides.Thesynthesesandmolecu-larstructuresof〔(… 相似文献
9.
LU Xiao Ming 《结构化学》2000,(3)
1 INTRODUCTIONPolymolybdateanionshavebeenstudiedformanyyearsbecauseoftheirapplica tionincatalysischemistry〔1〕.Inthesynthesisoforganicpolymolybdatederivativesusingacetoneassolvent,wefoundthatthecondensationreactionofacetoneoccurredandthecondensationprod… 相似文献
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1 INTRODUCTIONSulfoxideisknowntoformcoordinationcompoundswithLanthanide(Ⅲ)andtheirsyntheses,propertiesandvariousphysicalcharacteristicshavebeenreport-ed〔1~9〕.However,therearesomanydifficultyinpreparingthekindoflanthanidecomplexesbecausetheanionsuseda… 相似文献
11.
The crystal structure of the title compound 1-(4-fluorophenyl) -2-hexylthio-benzo [4,5]furo[3,2-d]-1,2,4-triazolo[1,5-a]pyrimidin-5(1H) -one(C23H21FN4O2S,Mr = 436.5) has been prepared and determined by single-crystal X-ray diffraction. The crystal is of monoclinic,space group P21/n with a = 13.9854(3) ,b = 17.2678(4) ,c = 18.1828(5) ,β = 99.364(2) °,V = 4332.58(18) 3,Z = 4,Dc = 1.338,F(000) =1824,μ = 0.185 mm-1,MoKa radiation(λ = 0.71073) ,R = 0.0538 and wR = 0.1162 for 4728 observed reflections with I > 2σ(I) . X-ray diffraction analysis reveals the fused rings of benzo[4,5]furo[3,2-d]-1,2,4-triazolo[1,5-a] pyrimidin-5(1H) -one system are nearly coplanar. The crystal packing is mainly stabilized by weak intermolecular C-H···O hydrogen bond and π-π interactions. 相似文献
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1INTR0DUCTI0NBenzoheteroazepinecompoundsareimportantpharmaceuticalagents"-".Inre-centyears,ithasbeenfoundthatbenzoheter0azepinetricyclicderivatives,especiallythosefusedwithotherfiveorsix-memberedheterocycle,area1soofpotentialphar-maceuticalinterestst4-6j.Hence,muchattentionhasbeenpaidtothesynthesesofthem,suchasl,3-oxazino[3,2-djt1,5jbenzothia/diazepin-l-onet"'J,1,2,4-tria-zolo[4,3-dj[1,5jbenzothia/diazepine"',1,2,4-oxadiazolo[4,5-dj[l,5jbenzothia/diazepine',',andsoon.Meanwhiletheirstructur… 相似文献
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《结构化学》1992,(4)
<正> The structure of 3a-(4-chlorophenyl)-1, 5-diphenyl-3a, 4,5,11-te-trahydrq-1, 2, 4-oxadiazolino [5, 4-d][1, 5] benzothiazepine (C28H21N2OClS) has been determined. The compound crystallizes in triclinic space group P1 with two formula units in a cell of dimensions: a =11. 114(2), b = 11. 673(1), c=10. 435(1) (?), α=98. 42(1), β=118. 69(1),γ = 98. 64(1)° and V = 1136. 2(3)(?)3. The structure was solved by using direct methods and refined by full matrix least-squares. The final crystallographic discrepancy factor is 0. 058 for 2384 observed reflections. The molecular backbone is a tricyclic system : The seven-membered hetero ring in the center is in twisted-boat conformation, and is cis-fused to 1, 2, 4-oxadiazolino ring which is in an envelope form, together with the equilaterally adjoined benzene ring . The compound has a non-planar conjugation system. 相似文献
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The title compound trans-4-[(5-(2,4-dichlorophenoxy)-3-methyl-1-phenyl-1H-pyra-zol-4-yl)methyleneamino]-1,5-dimethyl-2-phenyl-1,2-dihydropyrazol-3-one 3 (C28H23Cl2N5O2, Mr = 532.41) has been synthesized and its crystal structure was determined by single-crystal X-ray diffraction analysis. It crystallizes in triclinic, space group P1 with a = 8.9438(4), b = 11.6065(5), c = 14.2215(6) , α = 112.566(1), β = 92.324(2), γ = 102.91(1)o, V = 1315.65(10) 3, Z = 2, Dc = 1.344 g/cm3, μ(MoKα) = 0.282 mm-1, λ = 0.71073 , F(000) = 552, the final R = 0.0587 and wR = 0.1578 for 5071 observed reflections (I > 2σ(I)). X-ray analysis reveals that the product is a thermodynamically stable trans isomer. Intra-and intermolecular C(12)-H(12)···O(1) and C(28)-H(28)···O(1)#1 hydrogen bonds were observed in the title compound. 相似文献
15.
通过2-甲基-4-对甲苯基-1-苯甲酰基-2,3-二氢-1H-1,5-苯并二氮杂与由不对称1-苯基-2-偶氮-1,3-丁二酮热解产生的a-羰基烯酮的[2+4]环加成反应制备了标题化合物(C34H30N2O3,Mr=514.62),用X射线衍射测定了其单晶结构。晶体属单斜晶系,空间群为P21/n,a=11.560(1),b=19.058(3),c=13.207(2)A,β=106.82(1)°,V=2785.2(7)A3,Z=4,Dc=1.230g.cm-3,MoKa(λ=0.71073A),μ=0.064mm-1,F(000)=1088,2278个可观测衍子射点,R=0.046,Rw=0.049。分子骨架为由苯环、具有类扭船式构象的七元二氮杂环和略微扭曲的唑酮环构成的三环体系。 相似文献
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1INTRODUCTION Pyrazolo[1,5-a]pyrimidine derivatives have shown various biological activities in the terms of antibac-terial,antischistosomal and xanthine oxidase inhibi-tors[1~5].The enaminones are highly reactive inter-mediates and have been extensively used as build-ing blocks in organic synthesis especially in the he-terocyclic compounds[6~8].In addition,a great deal of interest has been focused on the synthesis of py-razolo[1,5-a]pyrimidine through versatile enamino-nes because of thei… 相似文献
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标题化合物C23H27O4Cl是由邻氯苯甲醛与5,5-二甲基-1,3-环己二酮在N,N-二甲基甲酰胺中反应而得。结构通过单晶X-射线衍射法测定,其晶体属于单斜晶系,空间群晶体结构用直接法解出,使用全矩阵最小二乘法对原子参数进行修正,最后的偏离因子为在晶体结构中,存在两个共轭的烯醇式结构。四个C-O健长分别为1.283(2),1.285(2),1.287(3)和1.298(2) 相似文献