Hydrosilylation,alsocalledcatalytichydrosilation,describestheadditionofSi-Hbondsacrossunsaturatedbonds.Ordinarilythereactionisconductedcatalyticallyandusuallythesubstratesareunsaturatedorganiccompounds.Alkenesandalkynesgivealkylandvinylsilanes;aldehydesandketonesgivesilylethers.Hydrosilylationhasbeencalledthe"mostimportantapplicationofplatinuminhomogeneouscatalysis."Hydrosilylationofalke...[
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1881年3月23日，海爾曼·施陶丁格出生在德國的弗爾姆斯。他父親是新康德派的哲學家，所以他從小就受到各種新的哲學思想的熏陶，對新事物比較敏銳，在科學推理、思維中，能夠不受傳統觀念的束縛，善於從複雜的事物中，理出頭緒，發現關鍵之處，提出新的觀點。在中學時，他曾對植物學發生濃厚的興趣，所以中學畢業後，他考入哈勒大學學習植物學。這時有一位對[
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Crabtree'scatalystisanorganoiridiumcompoundwiththeformula[C8H12IrP(C6H11)3C5H5N]PF6.Itisahomogeneouscatalystforhydrogenationandhydrogen-transferreactions,developedbyRobertH.Crabtree.Thisairstableorangesolidiscommerciallyavailableandknownforitsdirectedhydrogenationtogivetransstereoselectivitywithrespectiveofdirectinggroup.Crabtree’scatalystiseffectiveforthehydrogenationsofmono-,di-,tri-,a...[
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TheComins'reagentisatriflyl-donatingreagentthatisusedtosynthesizevinyltriflatesfromthecorrespondingketoneenolatesordienolates.
Itwasfirstreportedin1992byDanielComins.ThevinyltriflatespreparedareusefulassubstratesintheSuzukireaction.
Education
BAChemistryStateUniversityofNewYork1972
PhDChemistryUniversityofNewHampshire1977
PostdoctoralResearchChemistryColoradoStateU...[
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Wilkinson'scatalystisthecommonnameforchloridotris(triphenylphosphine)rhodium(I),acoordinationcomplexofrhodiumwiththeformula[RhCl(PPh3)3](Ph=phenyl).Itisared-browncoloredsolidthatissolubleinhydrocarbonsolventssuchasbenzene,andmoresointetrahydrofuranorchlorinatedsolventssuchasdichloromethane.Thecompoundiswidelyusedasacatalystforhydrogenationofalkenes.ItisnamedafterchemistandNobellaureateSirGeoff...[
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Acyclopentadienylcomplexisacoordinationcomplexofametalandcyclopentadienylgroups(C5H−
5,abbreviatedasCp−).Cyclopentadienylligandsalmostinvariablybindtometalsasapentahapto(η5-)bondingmode.Themetal–cyclopentadienylinteractionistypicallydrawnasasinglelinefromthemetalcentertothecenteroftheCpring.ExamplesBiscyclopentadienylcomplexesarecalledmetallocenes.Afamousexampleofthistype...[
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Martin'ssulfuraneistheorganosulfurcompoundwiththeformulaPh2S[OC(CF3)2Ph]2(Ph=C6H5).Itisawhitesolidthateasilyundergoessublimation.Thecompoundisanexampleofahypervalentsulfurcompoundcalledasulfurane.Assuch,thesulfuradoptsasee-sawstructure,withalonepairofelectronsastheequatorialfifthcoordinateofatrigonalbipyramid,likethatofsulfurtetrafluoride(SF4).Thecompoundisareagentinorganicsynthesis.Oneapplica...[
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1.元素周期表中所有元素都可以測出核磁共振譜嗎？不是。首先，被測的原子核的自旋量子數要不為零；其次，自旋量子數最好為1/2（自旋量子數大於1的原子核有電四極矩，峰很複雜）；第三，被測的元素（或其同位素）的自然豐度比較高（自然豐度低，靈敏度太低，測不出信號）。2.關於樣品管，要注意什麽？對於5mm探頭來說，其中探頭內部隔離樣品和線圈的石英管內徑隻有[
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據哈佛大學化學係教授消息，世界最傑出的有機化學家之一、美國哈佛大學化學與化學生物學係教授YoshitoKishi剛剛逝世，享年86歲。
KishiYoshito（岸義人），日本有機合成化學家，專長天然物化學，現任哈佛大學名譽教授，美國衛材株式會社副社長。
1937年4月13日，岸義人出生於日本愛知縣名古屋市。1966年在名古屋大學獲得理學博士。1966-1968年，在哈佛大學從事博士後[
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