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简介:新奇chiral为ligand交换层析(CLEC)的静止阶段(CSP1)被第一把dimethylchlorosilane用作在硅石胶化的表面上为减少的剩余silanol组盖住试剂的结束准备,然后同时作为一个chiral选购者和恐水病的辛基组把l职业人员介绍给硅石胶化表面。CSP1上的14dl氨基的酸的enantioseparations被完成,enantioselectivity和在0.8和6.3之间的决定R从1.09~2.44。有用参考方法准备的结合的阶段(CSP2)的CSP1的色析法的表演被比较。结果证明chiral的列效率和决定R静止阶段能被使用上述修改方法改进。
简介:Thedecompositiontemperaturesofthelanthanideorganiccomplexes(η^5-C5H5)2Ln(C6H5CONHO)involvingcyclopentadienylandbenzohydroxamicacidligandswerecalculatedandpredictedbythemodelbasedonANNs(artificialneuralnetowrks)method.ThecomparisonwascarriedoutbetweenresultsfromANNsmethodandtraditinalregressionmethod.ItisprovedthatANNscouldbeusedmoreefficientlyforthepredictionofdecompositiontemperatureoflanthanideorganiccomplexes.
简介:TherecyclablePEG-boundbi-cinchonaalkaloidligandhasbeensuccessfullyappliedtothehomogeneouscatalyticasymmetricdihydroxylationofvariousalkenes;goodyieldsandexcellentenantioselectivitieswereobtained,Theligandcouldbeeasilyrecoveredandreusedfor10timeswithoutanyapparentlossofitscatalystefficiency.
简介:Anewanionicdinuclearrutheniumcomplexbeating1,2-bis(diphenylphosphinomethyl)benzene(BDPX)[NH2Et2][{RuCl(BDPX)}2(μ-Cl)3](1)wassynthesizedanditsstructurewasdeterminedbyanX-raycrystallographicanalysis.Thisresultindicatedthatcomplex1consistedofananiondinuclearBDPX-Ruandacationicdiethylarnmonium.Thecrystalbelongedtomonoclinicsystem,C2/cspacegroupwitha=3.3552(7)nm,b=1.8448(4)nm,c=2.4265(5)nm,β=101.89(3)°andZ=8.Thecatalytichydrogenationactivitiesandselectivitiesofcomplex1forcinnamaldehydewereinvestigated,
简介:Aseriesofcarboxylate-substitutedtrinudearmolybdenumdus-tercompoundsformulatedasMo3S4(DTP)3(RCO2)(L),whereRffiH,CH3,C2H5,CH2Cl,CCl3,R^1C6H4(R^1isthegrouponthebenzeneringofaromaticcarboxylate),L=pyridine,CH3CN,DMF,havebeensynthesizedbytheligandsubstitu-tionreaction.Thedissociationoftheloosely-coordinatedligandLfromtheclustercorewasstudiedby^31pNMR.Thedissocia-tionprocessofLisrelatedtothesolvent,temperature,andacidityofcarboxylategroups,soastoaffectthesolutionstruc-tureandreactivepropertiesoftheduster.Thelong-distancein-teractionbetweenligandsRCO2andListransportedbyMo3S4core.
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简介:Tetrazole-1-aceticacidwasfoundtoserveasasuperiorligandforCuI-catalyzedN-arylationofimidazoleswitharyliodidesunderalowcatalystloading(5mol%ofCuI).AvarietyofaryliodidescouldbeaminatedtoprovidetheN-arylatedproductsingoodtoexcellentyieldswithouttheneedofaninertatmosphere.
简介:Thetetranuclearalkyltin(Ⅳ)compounds{[R2Sn(C9H8N3O3)O]SnR3}2[R=n-Bu(1),4-CNC6H4CH2(2),C6H5CH2(3),4-ClC6H4CH2(4)]werepreparedbythereactionofSchiffbaseligandpyruvicacidisonicotinylhydrazonewith(R3Sn)2Ointhecorrespondingmolarratioof1:1.Allcompoundshavebeencharacterizedbyelementalanalysis,IRand^1HNMRspectra.Thecrystalstructureofcompound1wasdeterminedbyX-raysinglecrystaldiffractionalanalysis.Thiscompoundexhibitsadimericstructurecontainingdistannoxaneunitswithtwotypesofthetinatoms.Forthefirsttinatom,itappearstobeseven-coordinatedwithadistortedpentagonalbipyramidgeometry,andtheotherisfive-coordinatedwithadistortedtrigonalbipyramidalgeometry.Themoleculesarepackedintheunitcellintwo-dimensionalnetworkstructurethroughaninteractionbetweentheNatomsofthepyridineandthetinatomsofanadjacentmolecule.