共查询到20条相似文献,搜索用时 15 毫秒
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1 INTRODUCTIONWehaveshownaninterestinexopolyhedralcyclizationofmetalligandstocluster.AseriesofmetallaboranecompoundscontainingfivememberedringssuchasM-O-C-O-BandM-S-C-O-Baresynthesizedandcharacterized.Thegroupsofcyclizationincludeacetate〔1〕,benzoat… 相似文献
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1 INTRODUCTIONThecondensationofaldehydeswithaminesisavaluablesyntheticmethodleadingtopolyazapolycyclics,includingcagedcompounds.Animportantapplicationofthisreactionisthesynthesisofhexabenzylhexaazaisowurtzitane(HBIW)anditsderivativeswithsubstitutedbenz… 相似文献
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1 INTRODUCTIONRecentyearshavewitnessedamarkedincreaseintheliteratureintheuseofsele niumandtelluriumasbridgingandstabilizingligandssincetheyexhibitunusualstruc turalandreactivitypatterns.〔1〕Ourongoingresearchprogramaimedatexploringnewconvenientsynthetic… 相似文献
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1INTRODUCTIONRecentresearchonaseriesofdinuclearmolybdenum(0)carbonylcomplexescontain ingthiolato bridgeshasledtotheconclusion... 相似文献
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1INTRODUCTIONInrecentyearsbiologicalyactiveorganoseleniumcompoundshavebeguntoat tractconsiderableinterestduetotheiruniqueandd... 相似文献
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1 INTRODUCTIONThemaintargetinmacrocyclicdesignistosynthesizemacrocycleswhichareabletodiscriminateamongthedifferentmetalcations.Manyfactorsinfluencingtheselectivitiesofmacrocyclesforcationshavebeendeterminedsuchassubstituenteffect,donoratomictypesand… 相似文献
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ZHANG Yu Hua a WU Shu Lin a LI Qing Shan a SONG Cui Ping a YIN Yuan Qi a② HUANG Xiao Ying b a 《结构化学》2000,(1)
1 INTRODUCTIONInthedevelopmentoftransitionmetalclusters,agreatmanytetrahedron-typechiralclustershavebeensynthesized.Oneimportantreasonisthatsuchclusterscanbepotentiallyusedasasymmetriccatalystsintheprocesswhichistrulycluster-cat-alyzed〔1,2〕.However,t… 相似文献
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1 INTRODUCTIONCertaincoppercomplexeshavebeenshowntohaveunusualchemicalpropertiessuchasoxygentransfer,oxidativeadditionandhomogenouscatalytichydrogenation[1].Oxidativeadditionreactionsarekeystepsintheactivationofσbondsinagreatnumberofcatalyticprocess.Cop… 相似文献
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1 INTRODUCTIONResearchonSHGeffecthasbeenonaremarkablepositioninorganicnonlinearoptical(NLO)materialsfield.Theconjugateddelocalizedπelectronspossiblyresultinthesecond-orderNLOpropertyoforganiccompounds,soanumberofnitroanilinederivatives,suchas2-methyl… 相似文献
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1INTRODUCTIONInrecentyears,higher nuclearityclustershavereceivedconsiderableatentionbecauseoftheirpotentialapplicationsinmany... 相似文献
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1 INTRODUCTIONOwingtotheirpossibleimportantrolesinlifeprocesses,cubanetypetetranuclearmolybdenumclustershavebeenextensivelyexploredduringthepasttwodecades,ofwhichtheclustercompoundsthatcontain〔Mo4XS3〕(X=SorO)corehaveattractedspecialattention〔17〕.Asp… 相似文献
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1 INTRODUCTIONSulfoxideisknowntoformcoordinationcompoundswithLanthanide(Ⅲ)andtheirsyntheses,propertiesandvariousphysicalcharacteristicshavebeenreport-ed〔1~9〕.However,therearesomanydifficultyinpreparingthekindoflanthanidecomplexesbecausetheanionsuseda… 相似文献
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1 INTRODUCTIONThemixedchaletNi(Ⅱ)complexescontainingpyridineshavebeenofgreatinterestforinorganicandbioinorganicchemists[1~5].VanillinisoneofthenormalusedcompoundswhichhavetwooxygenatomsandareeasytoformanumberofcomplexeswithCu(Ⅱ),Co(Ⅱ),Ni(Ⅱ),Zn(Ⅱ)andetal[6].Inth… 相似文献
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1 INTRODUCTIONDimolybdenumalkynecomplexes〔Mo2(μR1C≡CR2)(CO)4(η5C5H5)2〕canreactwithavarietyofreagentssuchasphosphines,thiols,elementalsulfur,Ru3(CO)12andCo2(CO)8〔1-4〕.Intheproductsthealkyneligandisusuallyretained.Sometimes,alkynescissionoccurs.Being… 相似文献
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1 INTRODUCTIONInrecentyears,theziniccompoundscontainingsulfurandnitrogenattractmoreandmoreattentionbecauseoftheirdeeprelationshipwithbio-inorganicchemistry〔1〕.Zinicsulfideplaysanimportantroleduetoitssignificantinvolvementinthestudyofthephosphors,semi… 相似文献
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LU Xiao Ming 《结构化学》2000,(3)
1 INTRODUCTIONPolymolybdateanionshavebeenstudiedformanyyearsbecauseoftheirapplica tionincatalysischemistry〔1〕.Inthesynthesisoforganicpolymolybdatederivativesusingacetoneassolvent,wefoundthatthecondensationreactionofacetoneoccurredandthecondensationprod… 相似文献
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Polyoxometalates (POMs)containingKegginmoi etieshavebeenreceivingextensiveattentioninrecentyearsowingtotheirgreatfundamentalandpracticalinter est .1Especiallytheunusualelectronicproperty (highnegativecharges) ,oneofthemostimportantpropertiesofPOMs ,haspoten… 相似文献
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INTRODUCTIONThesynthesisofpolynuclearcopper lanthanoidcomplexesisofspecialinterestforsev eralreasons〔1-4〕.Thesecomplexesareim... 相似文献
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1INTRODUCTIONRecently,thechemistryofcomplexescontaininglow valencemetalatomshasincreas inglyatractedtheatentionfromchemistsan... 相似文献
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LI Xue a YAO Hai Jun b HU Chun Hua a DOU Jian Min a c Sun Jie d JIN Ruo Shui b ZHENG Pei Ju a ② a 《结构化学》1999,(5)
1 INTRODUCTIONThefirstpolyhedralruthenaboraneisstructurallytypifiedbythecompound〔(PPh3)2RuB10H8(OEt)2〕in1984〔1〕,whichisobtainedin40%yieldbythereactionoftheclosodecaboraneanionB10H102-with〔RuCl2(PPh3)3〕inethanol/chloroformsolution.Researchershavesy… 相似文献