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Contemporary Organosilicon Chemistry
Contemporary organosilicon chemistry Edited by Steve Marsden Generated on 05 October 2021, 02:13 Imprint Beilstein Journal of Organic Chemistry www.bjoc.org ISSN 1860-5397 Email: [email protected] The Beilstein Journal of Organic Chemistry is published by the Beilstein-Institut zur Förderung der Chemischen Wissenschaften. This thematic issue, published in the Beilstein Beilstein-Institut zur Förderung der Journal of Organic Chemistry, is copyright the Chemischen Wissenschaften Beilstein-Institut zur Förderung der Chemischen Trakehner Straße 7–9 Wissenschaften. The copyright of the individual 60487 Frankfurt am Main articles in this document is the property of their Germany respective authors, subject to a Creative www.beilstein-institut.de Commons Attribution (CC-BY) license. Contemporary organosilicon chemistry Steve Marsden Editorial Open Access Address: Beilstein Journal of Organic Chemistry 2007, 3, No. 4. School of Chemistry, University of Leeds, Leeds LS2 9JT, UK doi:10.1186/1860-5397-3-4 Email: Received: 06 February 2007 Steve Marsden - [email protected] Accepted: 08 February 2007 Published: 08 February 2007 © 2007 Marsden; licensee Beilstein-Institut License and terms: see end of document. Abstract Editorial for the Thematic Series on Contemporary Organosilicon Chemistry. The field of organosilicon chemistry has a rich and varied the 1990s, and equivalent to the number appearing in the much history, and has long since made the progression from chemical longer established field of organoboron chemistry -
Aldrichimica Acta
VOLUME 51, NO. 1 | 2018 ALDRICHIMICA ACTA The Spectacular Resurgence of Electrochemical Redox Reactions in Organic Synthesis Carbon–Carbon π Bonds as Conjunctive Reagents in Cross-Coupling The life science business of Merck KGaA, Darmstadt, Germany operates as MilliporeSigma in the U.S. and Canada. MakInG sTrIDes In Genome EDITInG: THe DIGITaL, CHemIcaL, anD BIoLogIcaL Dear Fellow Researchers: You may not know that MilliporeSigma can make DNA from scratch, using 100% synthetic chemical methods—no living cells and no fermentation necessary. Our DNA synthesis facilities in The Woodlands (Texas) and Haverhill (U.K.) receive thousands of DNA orders daily from scientists all over the world. A small piece of DNA, one hundred bases long, gives scientists 4100 possibilities using only the fundamental letters of our genetic code (A,C,G,T). Included within these options is the opportunity for a researcher to open a common text editor on his or her PC and design a 100-base piece of DNA. This piece of DNA could help study diseases ranging from sickle cell anemia and blindness to cystic fibrosis by using CRISPR. To get started, scientists cut this 100-base DNA text from the text editor and paste it into MilliporeSigma’s online ordering system. The corresponding DNA piece that likely has never existed before is then delivered to them in 24–48 hours. Once received, this piece of DNA is mixed with CRISPR and living cells, and, with a “blast” of electricity, these synthetic chemical pieces activate the cell to edit the genome. Learn more about our CRISPR gene editing portfolio at SigmaAldrich.com/CRISPR Sincerely yours, Udit Batra, Ph.D. -
News Articles Events
NEWS ARTICLES EVENTS STRATHCLYDE STUDENTS LAND TOP AWARD AT BP COMPETITION FOR SECOND YEAR 19 – 21 MARCH 2013 Pathway to Research Enterprise: A team of Strathclyde Engineering students have won the top prize at the prestigious 2013 BP Enterprise Academy (FINAL FEW Ultimate Field Trip Competition – the second consecutive year Strathclyde students have won the PLACES) award. Enterprise Academy is an intensive ILM-accredited skills development Team Hydra, made up of Naval programme for early career research Architecture and Marine Engineering staff and postgraduate researchers, students Eric Brown, Hugh McQueen including a three-day fully-funded and Theo Scott, came out on top in the residential training element. When competition regarded as the UK’s the course piloted in 2011 it was leading science, technology, shortlisted for a THE award in the engineering and maths (STEM) talent category Outstanding Support for discovery event. Early Career Researchers, and offers a great opportunity for researchers to The students impressed the BP judges gain entrepreneurial confidence and and celebrity science enthusiast, Dara other transferable skills which will O Briain, with innovative ideas on how benefit them in their research. Full to develop a mode of transport that details about the Enterprise Academy reduces the cost of passenger travel in 2013 is available on the RDP website a selected country by 2030. or email Alexandra Ingvarsson. Winning student, Eric Brown, said: “It's 13 FEBRUARY 2013 an amazing feeling to win. I'm really proud of our team's achievement. It's definitely a competition I Department of Civil and would recommend to other students as it gives you a chance to really show what you're capable of. -
Nigam Prasad Rath Research Professor
Nigam Prasad Rath Research Professor Department of Chemistry and Biochemistry University of Missouri - St. Louis One University Boulevard St. Louis, MO 63121. E-mail: [email protected] Phone: 314-516-5333 FAX: 314-516-5342 Education : B. Sc.(Honors) : 1st Class Honors in Chemistry with Distinction, Berhampur University, Berhampur, India, 1977. M. Sc. (Chemistry): 1st Class, Berhampur University, Berhampur, India, 1979. Ph. D. (Chemistry): Oklahoma State University, Stillwater, OK, USA, 1985. Professional Experience: Research Professor , Department of Chemistry and Biochemistry, University of Missouri, St. Louis, MO, 2004 to present. Research Associate Professor , Department of Chemistry, University of Missouri, St. Louis, MO, 1997 to 2004. Research Assistant Professor , Department of Chemistry, University of Missouri, St. Louis, MO, 1989 to 1996. Assistant Faculty Fellow , Department of Chemistry, University of Notre Dame, Notre Dame, IN 1987 to 1989. Post Doctoral Research Associate , Department of Chemistry, University of Notre Dame, Notre Dame, IN 1986-87. Graduate Assistant , Department of Chemistry, Oklahoma State University, Stillwater, OK 1982 to 1985. Junior Research Fellow (CSIR) , Department of Chemistry, Indian Institute of Technology, Kharagpur, India, 1981-82. Junior Research Fellow , Department of Chemistry, Indian Institute of Technology, Kanpur, India, 1979 to 1981. 2 Professional Positions: Visiting Scientist, Monsanto Corporate Research, Chesterfield, MO, 1992 to 1994. Scientific Consultant, Regional Research Laboratory, Trivandrum, India, 1992 to present. Assistant Professor, Evening College, University of Missouri, St. Louis, 1992 to 2000. Research Mentor, Engelmann Mathematics and Science Institute, University of Missouri, St. Louis, 1990 to 1998. Research Mentor, NSF STARS Program, University of Missouri, St. Louis, 1999 to present. Honors and Awards: National Merit Scholarship, India, 1977-79. -
The Chemistry of Carbene-Stabilized
THE CHEMISTRY OF CARBENE-STABILIZED MAIN GROUP DIATOMIC ALLOTROPES by MARIHAM ABRAHAM (Under the Direction of Gregory H. Robinson) ABSTRACT The syntheses and molecular structures of carbene-stabilized arsenic derivatives of 1 1 i 1 1 AsCl3 (L :AsCl3 (1); L : = :C{N(2,6- Pr2C6H3)CH}2), and As2 (L :As–As:L (2)), are presented herein. The potassium graphite reduction of 1 afforded the carbene-stabilized diarsenic complex, 2. Notably, compound 2 is the first Lewis base stabilized diatomic molecule of the Group 13–15 elements, in the formal oxidation state of zero, in the fourth period or lower of the Periodic Table. Compound 2 contains one As–As σ-bond and two lone pairs of electrons on each arsenic atom. In an effort to study the chemistry of the electron-rich compound 2, it was combined with an electron-deficient Lewis acid, GaCl3. The addition of two equivalents of GaCl3 to 2 resulted in one-electron oxidation of 2 to 1 1 •+ – •+ – give [L :As As:L ] [GaCl4] (6 [GaCl4] ). Conversely, the addition of four equivalents of GaCl3 to 2 resulted in two- electron oxidation of 2 to give 1 1 2+ – 2+ – •+ [L :As=As:L ] [GaCl4 ]2 (6 [GaCl4 ]2). Strikingly, 6 represents the first arsenic radical to be structurally characterized in the solid state. The research project also explored the reactivity of carbene-stabilized disilicon, (L1:Si=Si:L1 (7)), with borane. The reaction of 7 with BH3·THF afforded two unique compounds: one containing a parent silylene (:SiH2) unit (8), and another containing a three-membered silylene ring (9). -
Synthesis and Consecutive Reactions of Α-Azido Ketones: a Review
Molecules 2015, 20, 14699-14745; doi:10.3390/molecules200814699 OPEN ACCESS molecules ISSN 1420-3049 www.mdpi.com/journal/molecules Review Synthesis and Consecutive Reactions of α-Azido Ketones: A Review Sadia Faiz 1,†, Ameer Fawad Zahoor 1,*, Nasir Rasool 1,†, Muhammad Yousaf 1,†, Asim Mansha 1,†, Muhammad Zia-Ul-Haq 2,† and Hawa Z. E. Jaafar 3,* 1 Department of Chemistry, Government College University Faisalabad, Faisalabad-38000, Pakistan, E-Mails: [email protected] (S.F.); [email protected] (N.R.); [email protected] (M.Y.); [email protected] (A.M.) 2 Office of Research, Innovation and Commercialization, Lahore College for Women University, Lahore-54600, Pakistan; E-Mail: [email protected] 3 Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia, Serdang-43400, Selangor, Malaysia † These authors contributed equally to this work. * Authors to whom correspondence should be addressed; E-Mails: [email protected] (A.F.Z.); [email protected] (H.Z.E.J.); Tel.: +92-333-6729186 (A.F.Z.); Fax: +92-41-9201032 (A.F.Z.). Academic Editors: Richard A. Bunce, Philippe Belmont and Wim Dehaen Received: 20 April 2015 / Accepted: 3 June 2015 / Published: 13 August 2015 Abstract: This review paper covers the major synthetic approaches attempted towards the synthesis of α-azido ketones, as well as the synthetic applications/consecutive reactions of α-azido ketones. Keywords: α-azido ketones; synthetic applications; heterocycles; click reactions; drugs; azides 1. Introduction α-Azido ketones are very versatile and valuable synthetic intermediates, known for their wide variety of applications, such as in amine, imine, oxazole, pyrazole, triazole, pyrimidine, pyrazine, and amide alkaloid formation, etc. -
Painsley Catholic College Introduction to Applied Science Transition Booklet
Painsley Catholic College Introduction to Applied Science transition booklet Get ready for Applied Science! A guide to help you get ready for AQA applied science. For any extra information please contact Miss Bradley, [email protected] Specification link : https://www.aqa.org.uk/subjects/science/applied- general/science THE TRANSITION WORK IN THE OVERVIEW IS COMPULSORY!! ALL OTHER WORK IN THIS INTRODUCTION DOCUMENT IS ADDITIONAL AND OPTIONAL!! What is included: • Transition work overview • Live stream lesson timetable • Textbook recommendations • Book recommendations • Movie recommendations • Videos to watch on line • Research activities • Ideas for day trips / Science on social media/ Science websites for virtual tours 1 Transition work overview Week 1 WC 1st June Complete Week 1 Biology work found in the document ‘Biology – Applied Science Transition Booklet’ (3 hours) Week 2 WC 8th June Complete Week 2 Biology work found in the document ‘Biology – Applied Science Transition Booklet’ (3 hours) Week 3 WC 15th Complete Week 3 Chemistry work found in the document ‘Chemistry – Applied June Science Transition Booklet’ (3 hours) Week 4 WC 22nd Complete Week 4 Chemistry work found in the document ‘Chemistry – Applied June Science Transition Booklet’ (3 hours) Week 5 WC 29th Complete Week 5 Physics work found in the document ‘Physics – Applied June Science Transition Booklet’ (3 hours) Week 6 WC 6th July Complete Week 6 Physics work found in the document ‘Physics – Applied Science Transition Booklet’ (3 hours) Week 7 WC 13th July Complete the AQA Transition booklets for Biology, Chemistry and Physics (1 hour each) Live stream lessons Google classroom code: pf26bkd Google meet code: cj5il5kbaa Thursday 11th Miss K. -
University Microfilms, Inc., Ann Arbor, Michigan MONOMERIC ORGANOSILICON COMPOUNDS
This dissertation has been . micro&hned exactly as received 66-3860 CHAPMAN, Dwain R, 1929- MONOMERIC ORGANOSnJCON COMPOUNDS WITH POLYFUNCTIONAL GROUPS. Iowa State University of Science and Technology Ph.D., 1965 Chemistry, organic University Microfilms, Inc., Ann Arbor, Michigan MONOMERIC ORGANOSILICON COMPOUNDS . WITH POLYPUNCTIONAL GROUPS by Dwain R Chapman A Dissertation Submitted to the Graduate Faculty in Partial Fulfillment of The Requirements for the Degree of DOCTOR OF PHILOSOPHY Major Subject: Organic Chemistry Approved Signature was redacted for privacy. In Chai^ge of Major Work Signature was redacted for privacy. Head of Major Department Signature was redacted for privacy. Iowa State University Of Science and Technology Ames, Iowa 1965 11 TABLE OP CONTENTS' Page INTRODUCTION , 1 NOMENCLATURE 3• HISTORICAL 5 Cyclosilanes 5 Reactions of Cyclosilanes 6 Reactions of the Silicon-Silicon Bond 12 The Ultraviolet Absorption Properties 21 of Polysilanes Heterocyclic Polysilanes 23 . EXPERIMENTAL 28 Preparation of Cyclosilanes 30 Octaphenylcyclotetrasilane. 30 Decaphenylcyclopentasilane (Ila) 31 Dodecamethylcyclohexasilane 32 % Reactions of Octaphenylcyclotetrasilane 33 Octaphenylcyclotetrasilane with 33 , . phosphorus pentachloride In benzene 33 Tn xylene 33 Octaphenylcyclotetrasilane with 34 phosphorus trichloride (attempted). Octaphenylcyclotetrasilane with . 34 chlorine In carbon tetrachloride 34 In ether 34 In petroleum ether (b.p. 60-70 C) 36 In n-pentane 36 In ether containing hydroquinone ' 36 Ill Octaphenylcyclotetrasllane -
Dealing with the Reality NORTHERN IRELAND ENVIRONMENT LINK CONFERENCE REPORT Foreword
Conference Proceedings April 2009 Climate Change: Dealing with the Reality NORTHERN IRELAND ENVIRONMENT LINK CONFERENCE REPORT Foreword Scientific and international political opinion agree that climate change is happening, that it is largely caused by human activities and that the implications are far ranging and very serious. Although there are uncertainties around the speed of change, the severity of that change and the nature and extent of its impacts, we cannot delay action to address the issues. An internationally renowned group of scientists assembled in W5 (Odyssey Complex), Belfast for Climate Change: Dealing with the Reality on 20th January 2009 to discuss the issues; this document is a summary of their thoughts. There are opportunities for Northern Ireland to be in the vanguard of both adaptation and mitigation technologies, bringing strong economic benefits to local companies. There are also opportunities to adopt policies and programmes that address the social and economic consequences of climate change while bringing benefits to Northern Ireland’s citizens. Grasping these opportunities requires strong and mature political leadership and offers Northern Ireland an opportunity to establish itself as a serious international leader. Climate change is just one of the many challenges facing Northern Ireland at this time and therefore cannot be dealt with in isolation. It provides a context within which specific issues — such as the increasing role of local authorities, tackling waste, changes in agriculture and the economic recession — can be better understood and more effectively addressed. Acknowledgements This report was compiled and designed by David McCann, and edited by David McCann and Sue Christie. We would like to thank all of the speakers at the conference both for the time and effort they put into producing their presentations and for writing their subsequent articles. -
Activation of Silicon Bonds by Fluoride Ion in the Organic Synthesis in the New Millennium: a Review
Activation of Silicon Bonds by Fluoride Ion in the Organic Synthesis in the New Millennium: A Review Edgars Abele Latvian Institute of Organic Synthesis, 21 Aizkraukles Street, Riga LV-1006, Latvia E-mail: [email protected] ABSTRACT Recent advances in the fluoride ion mediated reactions of Si-Η, Si-C, Si-O, Si-N, Si-P bonds containing silanes are described. Application of silicon bonds activation by fluoride ion in the syntheses of different types of organic compounds is discussed. A new mechanism, based on quantum chemical calculations, is presented. The literature data published from January 2001 to December 2004 are included in this review. CONTENTS Page 1. INTRODUCTION 45 2. HYDROSILANES 46 3. Si-C BOND 49 3.1. Vinyl and Allyl Silanes 49 3.2. Aryl Silanes 52 3.3. Subsituted Alkylsilanes 54 3.4. Fluoroalkyl Silanes 56 3.5. Other Silanes Containing Si-C Bond 58 4. Si-N BOND 58 5. Si-O BOND 60 6. Si-P BOND 66 7. CONCLUSIONS 66 8. REFERENCES 67 1. INTRODUCTION Reactions of organosilicon compounds catalyzed by nucleophiles have been under extensive study for more than twenty-five years. In this field two excellent reviews were published 11,21. Recently a monograph dedicated to hypervalent organosilicon compounds was also published /3/. There are also two reviews on 45 Vol. 28, No. 2, 2005 Activation of Silicon Bonds by Fluoride Ion in the Organic Synthesis in the New Millenium: A Review fluoride mediated reactions of fluorinated silanes /4/. Two recent reviews are dedicated to fluoride ion activation of silicon bonds in the presence of transition metal catalysts 151. -
The Lowest-Energy Isomer of C2si2h4 Is a Bridged Ring: Reinterpretation of the Spectroscopic Data Based on DFT and Coupled-Cluster Calculations
Air Force Institute of Technology AFIT Scholar Faculty Publications 4-11-2019 The Lowest-Energy Isomer of C2Si2H4 Is a Bridged Ring: Reinterpretation of the Spectroscopic Data Based on DFT and Coupled-Cluster Calculations Jesse J. Lutz ORISE Fellow Larry W. Burggraf Air Force Institute of Technology Follow this and additional works at: https://scholar.afit.edu/facpub Part of the Inorganic Chemistry Commons Recommended Citation Lutz, J. J., & Burggraf, L. W. (2019). The Lowest-Energy Isomer of C2Si2H4 Is a Bridged Ring: Reinterpretation of the Spectroscopic Data Based on DFT and Coupled-Cluster Calculations. Inorganics, 7(4), 51. https://doi.org/10.3390/inorganics7040051 This Article is brought to you for free and open access by AFIT Scholar. It has been accepted for inclusion in Faculty Publications by an authorized administrator of AFIT Scholar. For more information, please contact [email protected]. inorganics Article The Lowest-Energy Isomer of C2Si2H4 Is a Bridged Ring: Reinterpretation of the Spectroscopic Data Based on DFT and Coupled-Cluster Calculations Jesse J. Lutz 1,* and Larry W. Burggraf 2 1 ORISE fellow residing at Department of Engineering Physics, Air Force Institute of Technology, Wright-Patterson Air Force Base, Dayton, OH 45433-7765, USA 2 Department of Engineering Physics, Air Force Institute of Technology, Wright-Patterson Air Force Base, Dayton, OH 45433-7765, USA; Larry.Burggraf@afit.edu * Correspondence: jesse.lutz.ctr@afit.edu Received: 28 February 2019; Accepted: 3 April 2019; Published: 11 April 2019 Abstract: The lowest-energy isomer of C2Si2H4 is determined by high-accuracy ab initio calculations to be the bridged four-membered ring 1,2-didehydro-1,3-disilabicyclo[1.1.0]butane (1), contrary to prior theoretical and experimental studies favoring the three-member ring silylsilacyclopropenylidene (2). -
Standard Thermodynamic Properties of Chemical
STANDARD THERMODYNAMIC PROPERTIES OF CHEMICAL SUBSTANCES ∆ ° –1 ∆ ° –1 ° –1 –1 –1 –1 Molecular fH /kJ mol fG /kJ mol S /J mol K Cp/J mol K formula Name Crys. Liq. Gas Crys. Liq. Gas Crys. Liq. Gas Crys. Liq. Gas Ac Actinium 0.0 406.0 366.0 56.5 188.1 27.2 20.8 Ag Silver 0.0 284.9 246.0 42.6 173.0 25.4 20.8 AgBr Silver(I) bromide -100.4 -96.9 107.1 52.4 AgBrO3 Silver(I) bromate -10.5 71.3 151.9 AgCl Silver(I) chloride -127.0 -109.8 96.3 50.8 AgClO3 Silver(I) chlorate -30.3 64.5 142.0 AgClO4 Silver(I) perchlorate -31.1 AgF Silver(I) fluoride -204.6 AgF2 Silver(II) fluoride -360.0 AgI Silver(I) iodide -61.8 -66.2 115.5 56.8 AgIO3 Silver(I) iodate -171.1 -93.7 149.4 102.9 AgNO3 Silver(I) nitrate -124.4 -33.4 140.9 93.1 Ag2 Disilver 410.0 358.8 257.1 37.0 Ag2CrO4 Silver(I) chromate -731.7 -641.8 217.6 142.3 Ag2O Silver(I) oxide -31.1 -11.2 121.3 65.9 Ag2O2 Silver(II) oxide -24.3 27.6 117.0 88.0 Ag2O3 Silver(III) oxide 33.9 121.4 100.0 Ag2O4S Silver(I) sulfate -715.9 -618.4 200.4 131.4 Ag2S Silver(I) sulfide (argentite) -32.6 -40.7 144.0 76.5 Al Aluminum 0.0 330.0 289.4 28.3 164.6 24.4 21.4 AlB3H12 Aluminum borohydride -16.3 13.0 145.0 147.0 289.1 379.2 194.6 AlBr Aluminum monobromide -4.0 -42.0 239.5 35.6 AlBr3 Aluminum tribromide -527.2 -425.1 180.2 100.6 AlCl Aluminum monochloride -47.7 -74.1 228.1 35.0 AlCl2 Aluminum dichloride -331.0 AlCl3 Aluminum trichloride -704.2 -583.2 -628.8 109.3 91.1 AlF Aluminum monofluoride -258.2 -283.7 215.0 31.9 AlF3 Aluminum trifluoride -1510.4 -1204.6 -1431.1 -1188.2 66.5 277.1 75.1 62.6 AlF4Na Sodium tetrafluoroaluminate