21. Georg Wittig Nobel Winners picture, Nobel Winners Bio Georg Wittig (1897 1987) German chemist whose method of synthesizing olefins (alkenes) from carbonyl compounds is a reaction http://www.nobel-winners.com/Chemistry/georg_wittig.html

Georg Wittig Georg Wittig German chemist whose method of synthesizing olefins (alkenes) from carbonyl compounds is a reaction often termed the Wittig synthesis. For this achievement he shared the 1979 Nobel Prize for Chemistry. Wittig was born in Berlin and studied at Kassel and Marburg. He was professor at Freiburg 1937-44, Tubingen 1944-56, and Heidelberg 1956-67. In the Wittig reaction, which he first demonstrated 1954, a carbonyl compound (aldehyde or ketone) reacts with an organic phosphorus compound, an alkylidenetriphenylphosphorane, (C6H5)3P=CR2, where R is a hydrogen atom or an organic radical. The alkylidene group (=CR2) of the reagent reacts with the oxygen atom of the carbonyl group to form a hydrocarbon with a double bond, an olefin (alkene). In general: (C6H5)3P=CR2 + R2'CO (C6H5)3PO + R2C=CR2 The reaction is widely used in organic synthesis, for example to make squalene (the synthetic precursor of cholesterol) and vitamin D3. Main Page About Us http://www.nobel-winners.com/

22. Wittig, Georg Wittig, Georg (b. June 16, 1897, Berlind. Aug. 26, 1987, Heidelberg, W.Ger.), German chemist whose studies of organic phosphorus compounds won him a share (with Herbert C http://www.uv.es/EBRIT/micro/micro_642_94.html

Britannica CD Index Articles Dictionary Help Wittig, Georg (b. June 16, 1897, Berlind. Aug. 26, 1987, Heidelberg, W.Ger.), German chemist whose studies of organic phosphorus compounds won him a share (with Herbert C. Brown) of the Nobel Prize for Chemistry in 1979. In investigating reactions involving carbanions, negatively charged organic species, Wittig discovered a class of compounds called ylides mediating a particular type of reaction that became known as Wittig reactions and that proved of great value in the synthesis of numerous organic compounds. Related Propaedia Topics: Anomalous molecular structures, or molecular fragments with apparently anomalous valences Organic phosphorus compounds Reactions of organic compounds: addition, substitution, displacement, hydrolysis, pyrolysis, condensation, polymerization, molecular rearrangement

23. Facts About Wittig, Georg, As Discussed In Britannica Compton's Encyclopedia Wit Facts about Wittig, Georg, (1897–1987), German chemist, born in Berlin; on faculty of University of Marburg 1926–32, Technical College of Braunschweig 1932–37, University http://www.britannica.com/facts/11/921659/Wittig-Georg-as-discussed-in-Wittig-Ge

document.write(''); Search Site: Advanced Search With all of these words With the exact phrase With any of these words Without these words Home SHOP BROWSE BLOG ... HELP Username: Password: Remember me Forgot your password? Help Email " is the e-mail address you used when you registered. Password " is case sensitive. If you need additional assistance, please contact customer support Enter the e-mail address you used when enrolling for Britannica Premium Service and we will e-mail your password to you. FEEDBACK Did you know... Facts about Wittig, Georg, as discussed in Britannica Compton's Encyclopedia Wittig, Georg (1897–1987), German chemist, born in Berlin; on faculty of University of Marburg 1926–32, Technical College of Braunschweig 1932–37, University of Freiburg 1937–44, University of Tübingen 1944–56, University of Heidelberg 1956–65; received 1979 Nobel prize for discovery of Wittig reaction, which led to the synthesis of some pharmaceuticals and other... Get Random Facts About Us RSS Feeds E-mail Updates ... MORE... Britannica Content: Britannica Kids Test Prep Syndication International Publishing ... Magazines Other Britannica sites: Australia France India Korea ... SHARE Save to My Workspace Submit an image to Britannica Submit a video to Britannica All of the media associated with this article appears on the left. Click an item to view it.

24. Georg Wittig Winner Of The 1979 Nobel Prize In Chemistry Georg Wittig, a Nobel Prize Laureate in Chemistry, at the Nobel Prize Internet Archive. http://www.almaz.com/nobel/chemistry/1979b.html

G EORG W ITTIG 1979 Nobel Laureate in Chemistry for their development of the use of boron- and phosphorus-containing compounds, respectively, into important reagents in organic synthesis. Background Residence: Germany Affiliation: University of Heidelberg Featured Internet Links Prize Co-recipient: Herbert C. Brown Search WWW Search The Nobel Prize Internet Archive Links added by Nobel Internet Archive visitors Georg Wittig – Curriculum Vitae (submitted by Chinnappan Baskar June in Chemistry (submitted by Chinnappan Baskar The Wittig Reaction (submitted by Thomas Georg Wittig - Nobel Lecture (submitted by Davis) Georg Wittig (Biochemistry, Biographies) (submitted by Jackson) Georg Wittig - information (submitted by Larry) their development of the use of boron- and phosphorus-containing compounds, respectively, into important reagents in organic synthesis. (submitted by Alex CS) Georg Wittig Biography from Encyclopedia Britannica (submitted by www.britannica.com) Back to The Nobel Prize Internet Archive Literature Peace Chemistry ... Medicine We always welcome your feedback and comments

25. Wittig, Georg Friedrich Karl Wittig, Georg Friedrich Karl (18971987) 20th Century. Born Berlin (Germany), 1897 Died Heidelberg (Germany), 1987. Wittig studied in T bingen and Marburg. http://www.euchems.org/Distinguished/20thCentury/wittiggeorg.asp

Contact us Home 100 Distinguished 20th Century Wittig, Georg Friedrich Karl Wittig, Georg Friedrich Karl (1897-1987) 20th Century Born: Berlin (Germany), 1897 Died: Heidelberg (Germany), 1987 Wittig studied in Tübingen and Marburg. In 1932 he became professor in Braunschweig, in 1937 in Freiburg, in 1944 in Tübingen, in 1956 in Heidelberg. He did research on the stability and the reactions of organic radicals and on the course of those reactions in unsaturated systems. Starting from lithiumphenyl he synthesised ylides. In connection with those investigations he introduced compounds of boron and phosphorous into organic synthesis. In 1979 together with Herbert C. Brown he was awarded the Nobel Prize. Related Links The Nobel Prize in Chemistry 1979 Georg Wittig and Herbert C. Brown Georg Wittig Nobel Laureate in Chemistry Historical Aspects of Chemistry: Georg Wittig German chemist, Nobel Prizewinner 1979 for the Wittig Reaction How to Tackle Organic Syntheses - A Beginner's Guide by Prof Otto Meth-Cohn The Wittig Reaction External links will open in a new browser window Main Links About EuCheMS EuCheMS News Governance and Structure EuCheMS Chemistry Congresses ... EuCheMS Networking Scheme © EuCheMS 2010

26. Georg Wittig German chemist, Nobel Prizewinner 1979 for the Wittig Reaction Born Berlin, 16 June, 1897 Died 26 August, 1987 http://www.jergym.hiedu.cz/~canovm/mechanic/pravidl2/wit/wittig.htm

History Top Home Historical Aspects of Chemistry Wittig, Georg German chemist, Nobel Prizewinner 1979 for the Wittig Reaction Born: Berlin, 16 June, 1897 Died: 26 August, 1987 Wittig discovered his versatile route to alkenes via ylide molecules - the Wittig reaction - in 1949. Educated originally at Tübingen, Wittig spent periods at Braunschweig, Freiburg, back to Tübingen again, before taking up the post as director of the organic chemistry department at Heidelberg where he became an emeritus professor in 1967, remaining there until the end of his career. In 1967, he won the Otto Hahn Prize. In 1979, Herbert C. Brown and Georg Wittig were jointly awarded the Nobel Prize: for their development of the use of boron- and phosphorus-containing compounds, respectively, into important reagents in organic synthesis. See this page at Heidelberg for a picture and some more biographical details (in German). History top Home Ol' Spidey : page last changed 5 April 1997

27. The Nobel Prize In Chemistry 1979 Nobelprize.org, The Official Web Site of the Nobel Prize http://nobelprize.org/nobel_prizes/chemistry/laureates/1979/

Home FAQ Press Contact Us ... Nobel Prize in Chemistry The Nobel Prize in Chemistry 1979 About the Nobel Prizes Facts and Lists Nobel Prize in Physics Nobel Prize in Chemistry ... Nobel Prize Award Ceremonies Sort and list Nobel Prizes and Nobel Laureates Create a List All Nobel Prizes Nobel Prize Awarded Organizations Women Nobel Laureates Nobel Laureates and Universities Prize category: Physics Chemistry Medicine Literature Peace Economics The Nobel Prize in Chemistry 1979 Herbert C. Brown, Georg Wittig The Nobel Prize in Chemistry 1979 Summary Press Release Speed Read ... Nobel Lecture Herbert C. Brown Georg Wittig The Nobel Prize in Chemistry 1979 was awarded jointly to Herbert C. Brown and Georg Wittig "for their development of the use of boron- and phosphorus-containing compounds, respectively, into important reagents in organic synthesis" TO CITE THIS PAGE: MLA style: "The Nobel Prize in Chemistry 1979". Nobelprize.org. 1 Nov 2010 http://nobelprize.org/nobel_prizes/chemistry/laureates/1979/ About Nobelprize.org Technical Support Home FAQ ... Contact Us

28. Full Text Translator, Language Translation | Free Translations From Dictionary.c Free full text language translations at Translate.Reference.com. Free online translator and multilingual dictionary for over 50 foreign languages. http://translate.reference.com/translate?query=Wittig, Georg

29. GEORG WITTIG - Encyclopédie Universalis of chemical transformations, while caring very little for the theoretical and mechanistic underpinnings of the work he produced. Wittig, Georg Wittig, Georg Wittig, Georg Wittig http://www.universalis.fr/encyclopedie/georg-wittig/

Encyclopædia Universalis, le portail de la connaissance Accueil Boutique Contact Assistance J'ai oublié mon mot de passe Zone de recherche Saisir un mot clef WITTIG GEORG Chimiste allemand né à Berlin et mort à Heidelberg. Georg Wittig commence ses études de chimie en 1916 à l'université de Tübingen. Après avoir été prisonnier de guerre en Grande-Bretagne, il reprend ses études à l'université de Marburg, où il soutient en 1923 un doctorat préparé sous la direction de K. von Auwers. De 1923 à 1932, il est chef de travaux à l'institut de chimie de l'université de Marburg, puis, de 1932 à 1937, à l'institut technique de Brunswick. Il est ensuite professeur associé à l'université de Fribourg-en-Brisgau. Il est nommé, en 1944, professeur titulaire à Tübingen puis, en 1956, à Heidelberg, où il occupe les fonctions de directeur de l'institut de chimie de l'université. Il prend sa retraite en 1965. Le point culminant de l'abondante production scientifique de Wittig a été la mise au point de la réaction qui porte son nom. La réaction de Wittig consiste, dans sa forme la plus habituelle, en la réaction d'un  dérivé carbonylé, d'un al […]

30. Wittig, Georg - Personenlexikon From Georg Wittig Georg Wittig gmd de To axplist redhat com; Subject Re Cannot install RH5.2 on EB164; Date Mon, 18 Jan 1999 135533 +0100 http://www.personenlexikon.net/d/wittig-georg/wittig-georg.htm

Startseite Personenlexikon Thematische Gliederung Gruppen Kategorien ... Z Wittig, Georg deutscher Chemiker, geboren 16.6.1897 Berlin, verstorben 26.8.1987 Heidelberg; ab 1932 Professor in Braunschweig, ab 1937 in Freiburg i.Br., 1944–56 Tübingen und Heidelberg (1956–67); Arbeiten über Mono- und Di-Radikale, theoretische und präparative organische Chemie, lithiumorganische Verbindungen, metallorganische Komplexverbindungen, sterische Hinderung; fand 1930 eine einfache Darstellungsmethode für Phenyllithium; gab 1954 die Wittig-Reaktion (zur Olefinsynthese) an, mit der zahlreiche Naturstoffe (z.B. Carotinoide und Steroide) synthetisiert werden können; erhielt 1979 zusammen mit H.C. Brown den Nobelpreis für Chemie. Werke (Auswahl): »Lehrbuch der Stereochemie« (1930). Diese Seite als Bookmark speichern : addthis_url = location.href; addthis_title = document.title; addthis_pub = 'woorgle1492'; Witt, Otto Nikolaus Wittmann, Heinz-Günter Weitere Begriffe : Carrel, Alexis

31. Re: Cannot Install RH5.2 On EB164 From Georg Wittig Georg Wittig gmd de To axplist redhat com; Subject Re Cannot install RH5.2 on EB164; Date Fri, 15 Jan 1999 221224 +0100 http://www.redhat.com/archives/axp-list/1999-January/msg00692.html

Date Prev Date Next Thread Prev Thread Next ... Author Index Re: Cannot install RH5.2 on EB164 From To : axp-list redhat com Subject : Re: Cannot install RH5.2 on EB164 Date : Fri, 15 Jan 1999 22:12:24 +0100 References Cannot install RH5.2 on EB164 From: Re: Cannot install RH5.2 on EB164 From: Jay.Estabrook@digital.com Date Prev Date Next Thread Prev Thread Next ... Author Index

32. Witty | Define Witty At Dictionary.com wittig, georg –adjective,ti er, -ti est. 1. possessing wit in speech or writing; amusingly clever http://dictionary.reference.com/browse/witty

33. Witticism | Define Witticism At Dictionary.com wittig, georg –noun. a witty remark or sentence. http://dictionary.reference.com/browse/witticism

34. Wittgensteinian - Definition Of Wittgensteinian By The Free Online Dictionary, T wittiest wittiest Wittified Wittig ether rearrangement Wittig olefination Wittig reaction Wittig synthesis Wittig, Edward Wittig, Georg Wittig, Georg http://www.thefreedictionary.com/Wittgensteinian

35. Wittig Georg - WIEM, Darmowa Encyklopedia Georg Wittig – Born in Berlin in 1897. Doctorate and University Teaching Thesis in Marburg/Lahn from the Faculty of Chemistry. http://wiem.onet.pl/wiem/0060c4.html

Szukaj Poczta Onet.pl Wiem: ... Encyklopedie Start Kalendarium Twój notes S³owniki Kursy ... Jêzyki Szukaj w Onet.pl wittig georg tematy.onet.pl katalog.onet.pl Informacje o serwisie Kursy on-line Kody dostêpu Napisz do nas O nas ... Aktualizacja encyklopedii wszystkie s³ownik informatyczny polski bez b³êdów Poka¿ tylko zdjêcia, filmy i mapy Jak szukaæ? Wittig Georg Dodaj do notesu Chemia, Europa, Niemcy, XIX i pocz±tek XX w., Jêzykozawstwo Wittig Georg boru i fosforu w syntezie zwi±zków organicznych, opracowa³ metodê syntezy alkenów ze zwi±zków karbonylowych i ylidów (tzw. reakcja Wittiga), wyja¶ni³ rolê wolnych rodników podczas polimeryzacji Nagroda Nobla w 1979 (wraz z H.Ch. Brownem Odwied¼ w Internecie: Docent OnLine Inne na ten temat: Nobla Nagrody, 1976-1980 wiêcej Strona do Druku Encyklopedia WIEM zosta³a opracowana na podstawie Popularnej Encyklopedii Powszechnej Wydawnictwa Fogra http://www.fogra.com.pl/ Twój notes jest pusty. Mo¿esz dodawaæ do niego has³a i multimedia z Encyklopedii oraz ksi±¿ki z Biblioteki. Bêdziesz móg³ potem do nich ³atwo wróciæ. Notes mo¿esz uzupe³niaæ klikaj±c w "Dodaj do notesu" przy wybranym ha¶le, multimedium lub ksi±¿ce.

36. AccessScience | Organophosphorus Compound One of a series of derivatives of phosphorus that have at least one organic (alkyl Wittig, Georg (1897–1987) http://www.accessscience.com/search.aspx?rootID=795415

37. Wittingly - Definition Of Wittingly By The Free Online Dictionary, Thesaurus And Wittig, Georg Wittig, Georg wittily wittily wittiness wittiness wittiness wittiness witting witting witting witting Witting reaction wittingly wittite Wittkower, Rudolf http://www.thefreedictionary.com/wittingly

38. 20th Century Year By Year1979 The prize was divided equally between BROWN, HERBERT C., U.S.A., Purdue University, West Lafayette, IN, b. 1912 (in London, Great Britain); and WITTIG, GEORG, Federal Republic of http://www.historycentral.com/20th/1979.html

39. Georg Wittig: Facts, Discussion Forum, And Encyclopedia Article A chemist is a scientist trained in the science of chemistry. Chemists study the composition of matter and its properties such as density, acidity, size and shape. http://www.absoluteastronomy.com/topics/Georg_Wittig

Home Discussion Topics Dictionary ... Login Georg Wittig Georg Wittig Topic Home Discussion Discussion Ask a question about ' Georg Wittig Start a new discussion about ' Georg Wittig Answer questions from other users Full Discussion Forum Encyclopedia Georg Wittig chemist Chemist A chemist is a scientist trained in the science of chemistry. Chemists study the composition of matter and its properties such as density, acidity, size and shape. Chemists carefully describe the properties they study in terms of quantities, with detail on the level of molecules and their component... who reported a method for synthesis of alkene Alkene In organic chemistry, an alkene, olefin, or olefine is an unsaturated chemical compound containing at least one carbon-to-carbon double bond... s from aldehyde Aldehyde An aldehyde is an organic compound containing a formyl group. This functional group, with the structure R-CHO, consists of a carbonyl centre bonded to hydrogen and an R group.... s and ketone Ketone In organic chemistry, a ketone is a compound with the structure RCR', where R and R' can be a variety of atoms and groups of atoms. It features a carbonyl group bonded to two other carbon atoms.... s using compounds called phosphonium Phosphonium In chemistry, the phosphonium cation is a positively charged polyatomic ion with the chemical formula PH

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