2,061 research outputs found
Cyclization of di(tert-butyl-methyl)ketazine to 1,2-diaza-3-bora- and 1,2-diaza-3-sila-cyclopent-5-enes
No full textThe results of quantum chemical calculations on lithium ketazides suggest mainly four isomeric structures with different modes of lithium coordination (A-D). A monolithium ketazide thf-adduct (1) was isolated supporting the results of the quantum chemical calculations. In reactions of the lithiated di(tert-butyl-methyl)ketazine with BCl3 and Cl2BPh, 1,2-aza-azonia-3-borata-cyclopent-5-enes (2,3) were isolated. Substitution of a chlorine atom of 2 and 3 with t-BuLi leads to the formation of derivatives 4 and 5. HCl elimination from 2 with Et3N gives - via a diazaboracyclopentene (6) - a bicyclus 7. In the reaction of the dilithiated ketazine with F2BN(SiMC3)(2), the diaza-boracyclopentene 8 is obtained while with Cl4Si, F3SiN(SiMe3)(2), and Cl2SiMe2 the diazasilacyclopentenes 9 - 11 are generated. SiF4 reacts with the dilithium ketazide to give a spirocyclus (12). The monolithium ketazide and Cl2SiMe2 react at 30 degrees C to give a four-membered ring isomer of the substitution product which is formed via a 1,3-chlorine shift from silicon to carbon (13). A tetrameric silanolate was isolated as a by-product in this reaction. It gives evidence for the structure of lithium ketazide A. Crystal structures of 5, 7, 10, and 14 are reported
Jeunesse: Lecture suivie
No full textI am delighted to have found this little paperback in a favorite bookshop in Paris. I look forward to using it myself. It brings two of his best illustrators to a pupil's book of Florian's fables. The colored illustrations are not the only help for those of us trying to understand a sometimes difficult author. There are vocabulary notes, comments, and -- especially -- a short discussion of each fable's moral. These discussions are pleasantly candid, as in this comment on "La taupe et les lapins": "La fable de Florian est peut-être moins claire qu'elle n'y paraȋt" (55). Great work on rendering the colored illustrations!Language note: FrenchFloria
Cyclization of di(tert-butyl-methyl)ketazine to 1,2-diaza-3-bora- and 1,2-diaza-3-sila-cyclopent-5-enes
No full textThe results of quantum chemical calculations on lithium ketazides suggest mainly four isomeric structures with different modes of lithium coordination (A-D). A monolithium ketazide thf-adduct (1) was isolated supporting the results of the quantum chemical calculations. In reactions of the lithiated di(tert-butyl-methyl)ketazine with BCl3 and Cl2BPh, 1,2-aza-azonia-3-borata-cyclopent-5-enes (2,3) were isolated. Substitution of a chlorine atom of 2 and 3 with t-BuLi leads to the formation of derivatives 4 and 5. HCl elimination from 2 with Et3N gives - via a diazaboracyclopentene (6) - a bicyclus 7. In the reaction of the dilithiated ketazine with F2BN(SiMC3)(2), the diaza-boracyclopentene 8 is obtained while with Cl4Si, F3SiN(SiMe3)(2), and Cl2SiMe2 the diazasilacyclopentenes 9 - 11 are generated. SiF4 reacts with the dilithium ketazide to give a spirocyclus (12). The monolithium ketazide and Cl2SiMe2 react at 30 degrees C to give a four-membered ring isomer of the substitution product which is formed via a 1,3-chlorine shift from silicon to carbon (13). A tetrameric silanolate was isolated as a by-product in this reaction. It gives evidence for the structure of lithium ketazide A. Crystal structures of 5, 7, 10, and 14 are reported
Fables de Florian, Nouvelle Edition
No full textHere is a small edition, 3¼" x 5¼," of 162 pages. It seems to be identical to Bodemann #274, published by the same people two years earlier. As Bodemann notes in a very short description, the illustrations come as three panels per page. One panel often represents two fables. My favorites among these very small illustrations are "The Blind and the Lame" (18); "Two Bachelors" (48); "Owl and Pigeon" (83); and "Ass and Flute" (111). Do not miss the gigantic crocodile on 120! Illustrations occur facing these pages: 1, 12, 18, 29, 38, 48, 66, 83, 111, and 120. There is an AI at the back.This is a hardbound book (hard cover)Language note: FrenchNo Autho
From ketazines to 1,2-diaza-3-phospha-cyclopent-5-enes, penta-3,5-dienes, 1,5-diaza-2,6-diphospha-bicyclo[3.3.0]octa-3,7-diene, and cyclohexaphosphane
No full textThe dilithium salt of di(tert-butyl-methyl)ketazine 1 reacts with the bimolar amount of ClSiMe3 to give the di(tert-butyl-trimethylsilylmethylen)ketazine, 2. In the reaction of lithiated 2 and F2PN(iPr)(2) the 1,2-diaza-3-phosphacyclopent-5-ene (3) is formed. The dichlorophosphanes Cl2PC6H5 and Cl2PCMe3 react with 1 in boiling toluene to give the 1,2-diaza-3-phosphacyclopentenes 4 and 5. The oxygen of the air oxidizes 5 to the 1,2-diaza-3-phosphacyclopent-5-ene 6. Equivalent amounts of H2O cleave the ring skeleton of 5, the tert-butyl-methyl-(tert-butyl-(tert-butylphosphino)methyl-ketazine 7 being formed. The 1,2-diaza-3-phosphacyclopenta-3,5-diene 8 and the 1,5-diaza-2,6-diphospha-bicyclo[3.3.0]octa-3,7-diene 9 are the reaction products of 1 and PCl3 in toluene. 1 forms with HCl the hydrochloride 10. The 5-tert-butyl-1,2-diaza-3-phospha-cyclopenta-3,5-diene 11 is isolated from the reaction of 9 and MeLi. 11 is also obtained from PCl3 and tert-butyl-methyl-hydrazone in good yields. The cyclohexaphosphane 12 was formed in the reaction of 9 with Na/K alloy. The results of the crystal structure analyses of 2, 3, 6, 10, and 12 are reported
From ketazines to 1,2-diaza-3-phospha-cyclopent-5-enes, penta-3,5-dienes, 1,5-diaza-2,6-diphospha-bicyclo[3.3.0]octa-3,7-diene, and cyclohexaphosphane
No full textThe dilithium salt of di(tert-butyl-methyl)ketazine 1 reacts with the bimolar amount of ClSiMe3 to give the di(tert-butyl-trimethylsilylmethylen)ketazine, 2. In the reaction of lithiated 2 and F2PN(iPr)(2) the 1,2-diaza-3-phosphacyclopent-5-ene (3) is formed. The dichlorophosphanes Cl2PC6H5 and Cl2PCMe3 react with 1 in boiling toluene to give the 1,2-diaza-3-phosphacyclopentenes 4 and 5. The oxygen of the air oxidizes 5 to the 1,2-diaza-3-phosphacyclopent-5-ene 6. Equivalent amounts of H2O cleave the ring skeleton of 5, the tert-butyl-methyl-(tert-butyl-(tert-butylphosphino)methyl-ketazine 7 being formed. The 1,2-diaza-3-phosphacyclopenta-3,5-diene 8 and the 1,5-diaza-2,6-diphospha-bicyclo[3.3.0]octa-3,7-diene 9 are the reaction products of 1 and PCl3 in toluene. 1 forms with HCl the hydrochloride 10. The 5-tert-butyl-1,2-diaza-3-phospha-cyclopenta-3,5-diene 11 is isolated from the reaction of 9 and MeLi. 11 is also obtained from PCl3 and tert-butyl-methyl-hydrazone in good yields. The cyclohexaphosphane 12 was formed in the reaction of 9 with Na/K alloy. The results of the crystal structure analyses of 2, 3, 6, 10, and 12 are reported
Interview with Florian Bieber
No full textInterview with Florian Bieber, lecturer in East European Politics at the University of Kent in Canterbury, England. Interview conducted in Ithaca, NY on March 13, 2009. Dr. Bieber has worked in Belgrade (Serbia) and Sarajevo (Bosnia-Herzegovina) for the European Centre for Minority Issues and has taught at the Central European University, at the University of Sarajevo and at the University of Bologna. He is also the author of a book about Serbian nationalism, entitled Nationalism in Serbia from the Death of Tito to the Fall of Milosevic (Muenster: Lit Verlag, 2005, in German), and another book, Post-War Bosnia: Ethnic Structure, Inequality and Governance of the Public Sector (London: Palgrave, 2006). He?s at Cornell this spring semester of 2009 as the Luigi Einaudi Chair in European and International Studies.Bieber's current book project (01:30)
Bieber's reflections on the 20th anniversary of 1989 (02:00)
On Bieber's background in political science and history (03:19)
When interdisciplinarity works best (5:22)
On the "ghettoization" of the Balkans and its causes/possible solutions (6:30)
Unique contribution of our field to other fields (9:38)
Addressing the ongoing perception of a division of Europe into "East" and "West" (12:04)
On Bieber's interest in the study of nationalism (16:17)
Is there such a thing as "good nationalism"? (19:12)
On Bieber's "European" upbringing and early education (21:34)
Bieber on experiences/opportunities all Europeans should ideally have (24:56)
On the future of Southeastern Europe (26:17)1_ruh0kx6
Fables de Florian
No full textNouvelle édition, ornée de figures. This diminutive but complete edition (3¼ x 5¼) is not in Bodemann. The British Library seems to have an edition of Florian published by Genets Jeune in 1808. There are four illustrations here: The Cat and the Binoculars (56); The Children and the Partridges (122); The Savant and the Farmer (138); The Countryman and the River (182). There is an AI at the back. The first title-page lists 1821 as the publication date, but the second title-page has 1820.This is a hardbound book (hard cover)Language note: FrenchJean-Pierre Claris de Floria
Jakub Deml's Letters to Josef Florian
No full textTitle: The Letters of Jakub Deml to Josef Florian Author: Igor Pejchal Department: Institute of Czech Literature and Literary Theory Thesis Supervisor: Mgr. Daniela Iwashita, Ph.D. Key Words: correspondence, Jakub Deml, Josef Florian, Josef Ševčík, Otokar Březina, František Bílek, Pavla Kytlicová, Curia of Brno, Studium edition Abstract: The diploma thesis named The Letters of Jakub Deml to Josef Florian includes the edition of all the letters of the writer Jakub Deml (1878-1961). The correspondence from 1903 to 1935 includes 346 units and exploits 6 sources: the copies of letters done by Jaroslav Staněk, handwritten letters archived in Moravian Museum in Brno and LA PNP, Prague, letters addressed to Josef Florian as edited by Jiří Olič and hand-written originals possessed by two private owners. The edition of the collected letters is accompanied by a list of letters, an editorial note and translations of excerpts which are not in Czech. An accompanying study deals with the editorial history of these collected letters, the relationship of Jakup Deml and Josef Florian in the time of their collaboration and provides an outline of the future research tasks regarding this edition. The letters of Jakub Deml to Josef Florian are published in print in..
Determination of the Fiber Orientation from low resolution Computer Tomography images using Neural Networks
No full textAuthor Florian Schininger, BScMasterarbeit Universität Linz 2023Arbeit gesperr
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