Organometallic Chemistry
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The Synthesis of Novel Cyclohexyne Precursors for an Intramolecular
The Synthesis of Novel Cyclohexyne Precursors for an Intramolecular Pauson-Khand Type Reaction Honors Thesis by Samuel Isaac Etkind In partial fulfillment of the requirements for graduation with the Dean’s Scholars Honors Degree in Chemistry ______________________________ __________________ Stephen F. Martin Date Supervising Professor Table of Contents Acknowledgements ......................................................................................................................... 3 Abstract ........................................................................................................................................... 4 1. Introduction ................................................................................................................................. 5 1.1 The Synthesis and Application of Strained Cycloalkynes .................................................... 5 1.2 The Pauson-Khand Reaction ................................................................................................. 8 1.3 Potential Utility of Cyclohexyne in a Pauson-Khand Reaction .......................................... 11 1.4 Previous Work Towards This Goal ..................................................................................... 13 2. Results ....................................................................................................................................... 17 2.1 Second Generation Approach to Cyclohexyne Precursors ................................................. 17 2.2 Third Generation Approach -
Landolt-Börnstein Indexes of Organic Compounds Subvolumes A-I by V
Landolt-Börnstein Indexes of Organic Compounds Subvolumes A-I By V. Vill, C. Bauhofer, G. Peters, H. Sajus, P. Weigner, LCI-Publisher and Chemistry Department of the University of Hamburg All printed index material has been used to build up the comprehensive Scidex database index developed by LCI Publisher GmbH, Hamburg For further information please visit www.lci-publisher.com From this database a CD-ROM and two online versions were derived. The first is attached to each of the printed subvolumes and the latter are offered for free use at the following addresses: Scidex Database online with graphical structure search on http://lb.chemie.uni-hamburg.de/ Or the easy to use html version on http://lb.chemie.uni-hamburg.de/static/ Landolt-Börnstein Numerical Data and Functional Relationships in Science and Technology New Series / Editor in Chief: W. Martienssen Index of Organic Compounds Subvolume A Compounds with 1 to 7 Carbon Atoms Editor: V. Vill Authors: V. Vill, G. Peters, H. Sajus 1 3 ISBN 3-540-66203-0 Springer-Verlag Berlin Heidelberg New York Library of Congress Cataloging in Publication Data Zahlenwerte und Funktionen aus Naturwissenschaften und Technik, Neue Serie Editor in Chief: W. Martienssen Index of Organic Compounds A: Editor: V. Vill At head of title: Landolt-Börnstein. Added t.p.: Numerical data and functional relationships in science and technology. Tables chiefly in English. Intended to supersede the Physikalisch-chemische Tabellen by H. Landolt and R. Börnstein of which the 6th ed. began publication in 1950 under title: Zahlenwerte und Funktionen aus Physik, Chemie, Astronomie, Geophysik und Technik. -
Stabilization of Anti-Aromatic and Strained Five-Membered Rings with A
ARTICLES PUBLISHED ONLINE: 23 JUNE 2013 | DOI: 10.1038/NCHEM.1690 Stabilization of anti-aromatic and strained five-membered rings with a transition metal Congqing Zhu1, Shunhua Li1,MingLuo1, Xiaoxi Zhou1, Yufen Niu1, Minglian Lin2, Jun Zhu1,2*, Zexing Cao1,2,XinLu1,2, Tingbin Wen1, Zhaoxiong Xie1,Paulv.R.Schleyer3 and Haiping Xia1* Anti-aromatic compounds, as well as small cyclic alkynes or carbynes, are particularly challenging synthetic goals. The combination of their destabilizing features hinders attempts to prepare molecules such as pentalyne, an 8p-electron anti- aromatic bicycle with extremely high ring strain. Here we describe the facile synthesis of osmapentalyne derivatives that are thermally viable, despite containing the smallest angles observed so far at a carbyne carbon. The compounds are characterized using X-ray crystallography, and their computed energies and magnetic properties reveal aromatic character. Hence, the incorporation of the osmium centre not only reduces the ring strain of the parent pentalyne, but also converts its Hu¨ckel anti-aromaticity into Craig-type Mo¨bius aromaticity in the metallapentalynes. The concept of aromaticity is thus extended to five-membered rings containing a metal–carbon triple bond. Moreover, these metal–aromatic compounds exhibit unusual optical effects such as near-infrared photoluminescence with particularly large Stokes shifts, long lifetimes and aggregation enhancement. romaticity is a fascinating topic that has long interested Results and discussion both experimentalists and theoreticians because of its ever- Synthesis, characterization and reactivity of osmapentalynes. Aincreasing diversity1–5. The Hu¨ckel aromaticity rule6 applies Treatment of complex 1 (ref. 32) with methyl propiolate to cyclic circuits of 4n þ 2 mobile electrons, but Mo¨bius topologies (HC;CCOOCH3) at room temperature produced osmapentalyne favour 4n delocalized electron counts7–10. -
Catalytic Organic Transformations Mediated by Actinide Complexes
Inorganics 2015, 3, 392-428; doi:10.3390/inorganics3040392 OPEN ACCESS inorganics ISSN 2304-6740 www.mdpi.com/journal/inorganics Review Catalytic Organic Transformations Mediated by Actinide Complexes Isabell S. R. Karmel, Rami J. Batrice and Moris S. Eisen * Schulich Faculty of Chemistry, Technion—Israel Institute of Technology, Technion City, Haifa 32000, Israel; E-Mails: [email protected] (I.S.R.K.); [email protected] (R.J.B.) * Author to whom correspondence should be addressed; E-Mail: [email protected]; Tel./Fax: +972-4-829-2680. Academic Editors: Stephen Mansell and Steve Liddle Received: 16 September 2015 / Accepted: 9 October 2015 / Published: 30 October 2015 Abstract: This review article presents the development of organoactinides and actinide coordination complexes as catalysts for homogeneous organic transformations. This chapter introduces the basic principles of actinide catalysis and deals with the historic development of actinide complexes in catalytic processes. The application of organoactinides in homogeneous catalysis is exemplified in the hydroelementation reactions, such as the hydroamination, hydrosilylation, hydroalkoxylation and hydrothiolation of alkynes. Additionally, the use of actinide coordination complexes for the catalytic polymerization of α-olefins and the ring opening polymerization of cyclic esters is presented. The last part of this review article highlights novel catalytic transformations mediated by actinide compounds and gives an outlook to the further potential of this field. Keywords: organoactinides; actinide coordination complexes; homogeneous catalysis; hydroelementations; polymerization of olefins; ROP; activation of heterocumulenes 1. Introduction The beginning of modern organoactinide chemistry is often attributed to the synthesis of 8 uranocene, [(η -C8H8)2U] in 1968, as the analogous compound to ferrocene and other transition metal metallocenes [1,2]. -
Photochemical Generation of Carbenes and Ketenes from Phenanthrene-Based Precursors Part I: Dimethylalkylidene Part II: Diphenylketene
Colby College Digital Commons @ Colby Honors Theses Student Research 2017 Photochemical Generation of Carbenes and Ketenes from Phenanthrene-based Precursors Part I: Dimethylalkylidene Part II: Diphenylketene Tarini S. Hardikar Student Tarini Hardikar Colby College Follow this and additional works at: https://digitalcommons.colby.edu/honorstheses Part of the Organic Chemistry Commons Colby College theses are protected by copyright. They may be viewed or downloaded from this site for the purposes of research and scholarship. Reproduction or distribution for commercial purposes is prohibited without written permission of the author. Recommended Citation Hardikar, Tarini S. and Hardikar, Tarini, "Photochemical Generation of Carbenes and Ketenes from Phenanthrene-based Precursors Part I: Dimethylalkylidene Part II: Diphenylketene" (2017). Honors Theses. Paper 948. https://digitalcommons.colby.edu/honorstheses/948 This Honors Thesis (Open Access) is brought to you for free and open access by the Student Research at Digital Commons @ Colby. It has been accepted for inclusion in Honors Theses by an authorized administrator of Digital Commons @ Colby. Photochemical Generation of Carbenes and Ketenes from Phenanthrene-based Precursors Part I: Dimethylalkylidene Part II: Diphenylketene TARINI HARDIKAR A Thesis Presented to the Department of Chemistry, Colby College, Waterville, ME In Partial Fulfillment of the Requirements for Graduation With Honors in Chemistry SUBMITTED MAY 2017 Photochemical Generation of Carbenes and Ketenes from Phenanthrene-based Precursors Part I: Dimethylalkylidene Part II: Diphenylketene TARINI HARDIKAR Approved: (Mentor: Dasan M. Thamattoor, Professor of Chemistry) (Reader: Rebecca R. Conry, Associate Professor of Chemistry) “NOW WE KNOW” - Dasan M. Thamattoor Vitae Tarini Shekhar Hardikar was born in Vadodara, Gujarat, India in 1996. She graduated from the S.N. -
Arenechromium Tricarbonyl Complexes: Conformational
η6 – ARENECHROMIUM TRICARBONYL COMPLEXES: CONFORMATIONAL ANALYSIS, STEREOCONTROL IN NUCLEOPHILIC ADDITION AND APPLICATIONS IN ORGANIC SYNTHESIS by HARINANDINI PARAMAHAMSAN Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy Thesis Advisor: Prof. Anthony J. Pearson Department of Chemistry CASE WESTERN RESERVE UNIVERSITY May 2005 CASE WESTERN RESERVE UNIVERSITY SCHOOL OF GRADUATE STUDIES We hereby approve the dissertation of Harinandini Paramahamsan candidate for the Ph.D. degree*. (signed) Prof. Philip P. Garner (Chair of the Committee, Department of Chemistry, CWRU) Prof. Anthony J. Pearson (Department of Chemistry, CWRU) Prof. Fred L. Urbach (Department of Chemistry, CWRU) Dr. Zwong-Wu Guo (Department of Chemistry, CWRU) Dr. Stuart J. Rowan (Department of Macromolecular Science and Engineering, CWRU) Date: 14th January 2005 *We also certify that written approval has been obtained for any propriety material contained therein. To Amma, Naina & all my Teachers Table of Contents List of Tables………………………………………………………………………..……iv List of Figures…………………………………………………………………….…........vi List of Schemes…………………………………………………………………….….….ix List of Equations………………………………………………………...……….……….xi Acknowledgements………………………………………………………….…..……….xii List of Abbreviations……………………………………………………………………xiv Abstract………………………………………………………………………………….xvi CHAPTER I........................................................................................................................ 1 I.1 Structure and Bonding ........................................................................................... -
Cycloalkanes, Cycloalkenes, and Cycloalkynes
CYCLOALKANES, CYCLOALKENES, AND CYCLOALKYNES any important hydrocarbons, known as cycloalkanes, contain rings of carbon atoms linked together by single bonds. The simple cycloalkanes of formula (CH,), make up a particularly important homologous series in which the chemical properties change in a much more dramatic way with increasing n than do those of the acyclic hydrocarbons CH,(CH,),,-,H. The cyclo- alkanes with small rings (n = 3-6) are of special interest in exhibiting chemical properties intermediate between those of alkanes and alkenes. In this chapter we will show how this behavior can be explained in terms of angle strain and steric hindrance, concepts that have been introduced previously and will be used with increasing frequency as we proceed further. We also discuss the conformations of cycloalkanes, especially cyclo- hexane, in detail because of their importance to the chemistry of many kinds of naturally occurring organic compounds. Some attention also will be paid to polycyclic compounds, substances with more than one ring, and to cyclo- alkenes and cycloalkynes. 12-1 NOMENCLATURE AND PHYSICAL PROPERTIES OF CYCLOALKANES The IUPAC system for naming cycloalkanes and cycloalkenes was presented in some detail in Sections 3-2 and 3-3, and you may wish to review that ma- terial before proceeding further. Additional procedures are required for naming 446 12 Cycloalkanes, Cycloalkenes, and Cycloalkynes Table 12-1 Physical Properties of Alkanes and Cycloalkanes Density, Compounds Bp, "C Mp, "C diO,g ml-' propane cyclopropane butane cyclobutane pentane cyclopentane hexane cyclohexane heptane cycloheptane octane cyclooctane nonane cyclononane "At -40". bUnder pressure. polycyclic compounds, which have rings with common carbons, and these will be discussed later in this chapter. -
Diphosphazide-Supported Trialkyl Thorium(IV) Complex Tara K
pubs.acs.org/Organometallics Communication Diphosphazide-Supported Trialkyl Thorium(IV) Complex Tara K. K. Dickie, Ashraf A. Aborawi, and Paul G. Hayes* Cite This: Organometallics 2020, 39, 2047−2052 Read Online ACCESS Metrics & More Article Recommendations *sı Supporting Information ABSTRACT: The potassium salt of a new ligand, KLP=N3 (2, κ5 i i − LP=N3 = -2,5-[(4- PrC6H4)N3 P Pr2]2N(C4H2) ), that features two units of the rare phosphazide (RN3 PR3) functionality was synthesized via an incomplete Staudinger reaction between K[2,5- i i ( Pr2P)2N(C4H2)] (1)and4-PrC6H4N3. The diphosphazide ligand was transferred to a thorium(IV) metal center using salt metathesis strategies, yielding LP=N3ThCl3 (3), which contains two intact and coordinated phosphazides. Reaction of complex 3 with 3 equiv of LiCH2SiMe3 resulted in formation of the trialkyl thorium species LP=N3Th(CH2SiMe3)3 (4). In contrast, attempts to synthesize an organothorium complex supported by the previously κ3 reported bisphosphinimine ligand LP=N (LP=N = -2,5- i i − ff [(4- PrC6H4)N P Pr2]2N(C4H2) )aorded the cyclometalated * * κ4 i i i i 2− dialkyl complex L P=NTh(CH2SiMe3)2 (6,L PN = -2-[(4- PrC6H3)N P Pr2]-5-[(4- PrC6H4)N P Pr2]N(C4H2) ) and 1 equiv of free tetramethylsilane. 1 he Staudinger reaction, discovered in 1919, introduced the facile loss of N2, and, accordingly, were overlooked as ′ ’ T the formation of a phosphinimine group (R3P NR ) via viable functional groups in ligand design. Since Staudinger s the reaction of a tertiary phosphine (R3P) with an organic original work, multiple methods have been developed to ′ azide (N3R ), resulting in concomitant loss of N2. -
Cr(CO)6 System, While for the Mo(CO)6 and W(CO)E
The photochemistry of M(CO)6 and (rj6-pyridine)Cr(CO )3 (M = Cr, Mo, or W) and related systems. This thesis is presented to Dublin City University for the degree, Doctor of Philosophy, by Ciara Breheny BSc Supervisor Dr Conor Long School of Chemical Sciences, Dublin City University 1996 Declaration This thesis has not been submitted as an exercise for a degree at this or at any other university. Except as otherwise stated, this work has been carried out by the author alone. Signed Ciara Breheny. Dedication This thesis is dedicated to my family, Mum, Dad, Conor, and Saibh HI Acknowledgements I would like to say a most sincere thank you to all the following people, Dr Conor Long, for his constant support, help, and advice over the past few years All members past and present of the CLRG, namely Irene, Mick, Maureen, Celia, Mary, Siobhan, and Deirdre Everyone in AG07 who made the past few years enjoyable and unforgettable All members of the chemistry department, especially the technicians, who were always at hand to help when a problem arose (as it invariably did) A word of thanks to my friends outside DCU without whom the past few years would not have been the same, namely, Mane, Ger, Siobhan, Orla, Greg, Ciaran, Shivaun, Ciara, Teresa, Monica, Susan, Bronagh, Anna, Dawn, and Fiona Also a special thanks to Paul for his support over the past year Finally, to my family for their never-ending patience with the seemingly endless student life I have undertaken Without their love and support these past few years would have been a lot more difficult -
CHEM 1411 Nomenclature Homework - Answers Part I
1 CHEM 1411 Nomenclature Homework - Answers Part I 1. The following are a list of binary and pseudobinary ionic compounds. Write the name when the formula is given. Write the formula when the name is given. (a) AlCl3 aluminum chloride (k) rubidium oxide Rb2O (b) AuBr3 gold (III) bromide (l) chromium (III) selenide Cr2Se3 (c) Na2S sodium sulfide (m) barium iodide BaI2 (d) Cu3P2 copper (II) phosphide (n) copper (I) fluoride CuF (e) Fe(OH)2 iron (II) hydroxide (o) copper (II) fluoride CuF2 (f) NH4OH ammonium hydroxide (p) strontium cyanide Sr(CN)2 (g) Co(CH3COO)3 cobalt (III) acetate (q) mercury (II) bromide HgBr2 (h) Zn(SCN)2 zinc thiocyanate (r) mercury (I) bromide Hg2Br2 (i) CaCrO4 calcium chromate (s) magnesium permanganate Mg(MnO4)2 (j) K2Cr2O7 potassium dichromate (t) lithium nitride Li3N 2. The following are lists of covalent compounds. Write the name when a formula is given. Write the formula when given a name. (a) CSe2 carbon diselenide (h) dichlorine heptoxide Cl2O7 (b) SF6 sulfur hexafluoride (i) xenon tetrafluoride XeF4 (c) BrF5 bromine pentafluoride (j) carbon monoxide CO (d) P4O10 tetraphosphorous decoxide (k) oxygen O2 (e) Cl2O dichlorine oxide (l) diboron trioxide B2B O3 (f) NH3 ammonia (m) arsenic trifluoride AsF3 (g) N2 dinitrogen or nitrogen (n) diiodine I2 2 3. The following are lists of acids or acid-forming compounds. Write the name when the formula is given. Write the formula when the name is given. (a) H3PO2 hypophosphorous acid (k) hydrogen cyanide HCN (g) (b) H2SO4 sulfuric acid (l) periodic acid HIO4 (c) HClO hypochlorous acid (m) hypochlorous acid HClO (d) H3PO4 phosphoric acid (n) nitric acid HNO3 (e) HBrO4 perbromic acid (o) acetic acid CH3CO2H (f) HIO2 iodous acid (p) chloric acid HClO3 (g) HI (g) hydrogen iodide (q) perbromic acid HBrO4 (h) HI (aq) hydroiodic acid (r) hydrofluoric acid HF (aq) (i) HCN (aq) hydrocyanic acid (s) phosphorous acid H3PO3 (j) HBrO hypobromous acid (t) hydrosulfuric acid H2S (aq) 4. -
Summaries of FY 1997 Research in the Chemical Sciences
DOE/NBM-1098 Rev.-1 September 1997 T O EN FE TM N R E A R P G E Y D U • • A N C I I T R E D E M ST A ATES OF Summaries of FY 1997 Research in the Chemical Sciences U.S. Department of Energy Office of Energy Research Division of Chemical Sciences A searchable version of this summary book is available at the following web address: http://websrv.er.doe.gov/asp/search.asp This search tool is also accessible from the Chemical Sciences web page at: http://www.er.doe.gov/production/bes/chm/chmhome.html Available to DOE and DOE contractors from the Office of Scientific and Technical Information, P.O. Box 62, Oak Ridge, TN 37831; prices available from (423) 576-8401 Available to the public from the U.S. Department of Commerce, Technology Administration, National Technical Information Service, Springfield, VA 22161 This document was produced under contract number DE-AC05-76OR00033 between the U.S. Department of Energy and Oak Ridge Associated Universities. ORISE 97-1555 CONTENTS CONTENTS PREFACE ........................................................................ vii Oak Ridge National Laboratory.............................. 42 DIVISION OF CHEMICAL SCIENCES ..................... viii Pacific Northwest National Laboratory .................. 44 PROGRAM DESCRIPTIONS ........................................ ix Heavy Element Chemistry ....................................... 45 LABORATORY ADMINISTRATION ......................... xiii Argonne National Laboratory ................................. 45 Lawrence Berkeley National Laboratory............... -
Synthesis, Characterization and Metal Carbonyl Complex Formation of Polycyclic Phosphorus Ligands Arthur Cyril Vandenbroucke Jr
Iowa State University Capstones, Theses and Retrospective Theses and Dissertations Dissertations 1967 Synthesis, characterization and metal carbonyl complex formation of polycyclic phosphorus ligands Arthur Cyril Vandenbroucke Jr. Iowa State University Follow this and additional works at: https://lib.dr.iastate.edu/rtd Part of the Inorganic Chemistry Commons Recommended Citation Vandenbroucke, Arthur Cyril Jr., "Synthesis, characterization and metal carbonyl complex formation of polycyclic phosphorus ligands " (1967). Retrospective Theses and Dissertations. 3219. https://lib.dr.iastate.edu/rtd/3219 This Dissertation is brought to you for free and open access by the Iowa State University Capstones, Theses and Dissertations at Iowa State University Digital Repository. It has been accepted for inclusion in Retrospective Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository. For more information, please contact [email protected]. This dissertation has been microfihned exactly as received 68-5990 VANDENBROUCKE, Jr., Arthur Cyril, 1941- SYNTHESIS, CHARACTERIZATION AND METAL CARBONYL COMPLEX FORMATION OF POLYCYCLIC PHOSPHORUS LIGANDS. Iowa State University, Ph.D,, 1967 Chemistry, inorganic University Microfilms, Inc., Ann Arbor, Michigan . .SYNTHESISJ CHARACTERIZATION AND METAL CARBONYL COMPLEX FORMATION OF POLYCYCLIC PHOSPHORUS LIGANDS by Arthur Cyril Vandenbroucke, Jr. A -Dissertation Submitted to the Graduate Faculty in Partial Fulfillment of The Requirements for the Degree of DOCTOR OF PHILOSOPHY Major Subject: Inorganic Chemistry • Approved: Signature was redacted for privacy. argë of Major Work Signature was redacted for privacy. Head of Major DepartmentDepart Signature was redacted for privacy. Iowa State University •Of Science and Technology Ames J Iowa 1967 il TABLE OF CONTENTS Pagé I. INTRODUCTION 1 II. A STUDY OF THE SYNTHESIS OF 1-PHOSPHAADAMANTANE 2 A.