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1.
1 INTRODUCTIONInthedevelopmentoftransitionmetalclusters,agreatmanytetrahedron-typechiralclustershavebeensynthesized.Oneimportantreasonisthatsuchclusterscanbepotentiallyusedasasymmetriccatalystsintheprocesswhichistrulycluster-cat-alyzed〔1,2〕.However,t…  相似文献   

2.
1INTRODUCTIONInrecentyears,higher nuclearityclustershavereceivedconsiderableatentionbecauseoftheirpotentialapplicationsinmany...  相似文献   

3.
1 INTRODUCTIONPolymolybdateanionshavebeenstudiedformanyyearsbecauseoftheirapplica tionincatalysischemistry〔1〕.Inthesynthesisoforganicpolymolybdatederivativesusingacetoneassolvent,wefoundthatthecondensationreactionofacetoneoccurredandthecondensationprod…  相似文献   

4.
1 INTRODUCTIONOwingtotheirpossibleimportantrolesinlifeprocesses,cubanetypetetranuclearmolybdenumclustershavebeenextensivelyexploredduringthepasttwodecades,ofwhichtheclustercompoundsthatcontain〔Mo4XS3〕(X=SorO)corehaveattractedspecialattention〔17〕.Asp…  相似文献   

5.
Thetrimolybdenumclusterswithgeneralformula[Mo3(μ3S)(μS)3(μdtp)(dtp)3L](dtp=(S2P(OC2H5)2)-,L=H2O,py,SC(NH2)2etc.)[1](referredtoasM1type[2]),and[Mo3(μ3S)(μS2)3(dtp)3]X(X=Cl,I)[3](referredtoasM2type),aretwomaintypesoftrimolybdenumclusterseverinvestigatedbyourresearchgroup.Aswehavealready…  相似文献   

6.
1INTRODUCTIONIntenseinterestintransition metalclusterscontinuesbecausetheyrepresentpos sibleconceptualbridgesbetweenhomogeneo...  相似文献   

7.
1 INTRODUCTIONWehaveshownaninterestinexopolyhedralcyclizationofmetalligandstocluster.AseriesofmetallaboranecompoundscontainingfivememberedringssuchasM-O-C-O-BandM-S-C-O-Baresynthesizedandcharacterized.Thegroupsofcyclizationincludeacetate〔1〕,benzoat…  相似文献   

8.
Itiswellknownthatinnaturetheactivationandreductionofdinitrogeninairtoammoniaarecatalyzedbynitrogenaseatambienttemperatureandpressure.ThemaincomponentsoftheactiveclusterofMoFeproteininnitrogenaseareMcluster(MoFe7S9cluster)andPcluster(Fe8S8cluster)[1].Inthel…  相似文献   

9.
IntroductionInthelasttwodecadesintensivestudieshavebeencarriedoutonthemolybdenum (tungsten)chalcogenideclusters ,resultinginthediscoveryofseriesofmonomer ic ,polynuclearMo(W ) andMo(W ) heterometallicco mplexes .Triangular ,cubane ,octahedralaswellashex nuclear…  相似文献   

10.
1 INTRODUCTIONThestudyofpurecarbonmoleculeshasengagedgreatinterestformanydecades,adetailedknowledgeofthephysicalandchemicalpropertiesofcarbonclustersisim portantforunderstandingalargevarietyofthechemicalsystems〔1〕.Duetotheenor mousbondingflexibilityofca…  相似文献   

11.
IntroductionThesynthesisandsorptionpropertiesofopenframe worksolidssuchaszeolites1andmetalmolybdenumphos phate2 ,3withlargecavitiesprovokedenormousinterestbe causeoftheirpotentialapplicationincatalysis .One ,two andthree dimensionalsolidcompoundsconsistingo…  相似文献   

12.
SynthesisandStructureofPropionate-bridgedMixed-metalClusterCompound:〔MoW_2O_2(O_2CC_2H_5)_6(H_2O)_3〕ZnBr_4·4H_2O¥LiuHuang;XuLi;Hua...  相似文献   

13.
Quasi-aromaticityinClusterChemistryIII.LocalizedMolecularOrbitalStudyonElectron-richCobalt-sulfurClusterCompounds[Co_6(μ_3-X)_...  相似文献   

14.
ThePolymerizationofMethylMethacrylatewithaNewNd(O—i┐Pr)3—AI(i┐Bu)3CatalystSystem*SUNJun-quan(Dept.ofPolym.Sci.andEnginering,Z...  相似文献   

15.
Quasi-aromaticityinClusterChemistryⅡ.LocalizedMolecularOrbitalStudieson〔Co_6(CO)_(14)〕~(4-)and〔Ni_2Co_4(CO)_(14)〕~(2-)ClusterAni?..  相似文献   

16.
Synthesis and Crystal Structure of Mixed Mo-W Cubane-type Cluster Compound [Mo_2W_2S_4(μ-OAc)_2(dtp)_3(dtpH)]·CH_2Cl_2ChenQiu-Hu?..  相似文献   

17.
AsymmetricSynthesisofChiralClustersInducedbyChiralPhase-TransferCatalystWUShulinDINGErrunLIQingshanYINYuanqi1)(StateKeyLabora...  相似文献   

18.
1 INTRODUCTIONAmethodofspacegrouprevisionbywhichthestructurefactorsofthelower symmetrystructurearegeneratedandthestructureisthensolvedfromthesimulatedintensitydatahasbeenrecentlyreported[1].Thismethodisnowappliedtotherevi sionofthespacegroupofthemetal cl…  相似文献   

19.
SynthesisandCrystalStructureofμ_4-alkyneClusterComplex(μ_4-η~2-C_2Ph_2)Co_4(CO)_8(μ-CO)_2SongLi-Cheng;ShenJin-Yu;HuQing-Mei;Huang...  相似文献   

20.
IntroductionThesupramolecularcomplexeformedbytheweakinteractions (electrostaticinteraction ,hydrogenbonds ,vanderWaalsforce ,short rangeexclusionforce ,etc .)ofmorethantwosortsofspeciesisanorganizingentitythatusuallypossessesspecialstructureandfunction .1Sup…  相似文献   

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