Bunsen and Spectroscopy
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Geoffrey Wilkinson
THE LONG SEARCH FOR STABLE TRANSITION METAL ALKYLS Nobel Lecture, December 11, 1973 by G EOFFREY W ILKINSON Imperial College of Science & Technology, London, England Chemical compounds in which there is a single bond between a saturated car- bon atom and a transition metal atom are of unusual importance. Quite aside from the significance and role in Nature of the cobalt to carbon bonds in the vitamin B 12 system and possible metal to carbon bonds in other biological systems, we need only consider that during the time taken to deliver this lec- ture, many thousands, if not tens of thousands of tons of chemical compounds are being transformed or synthesised industrially in processes which at some stage involve a transition metal to carbon bond. The nonchemist will pro- bably be most familiar with polyethylene or polypropylene in the form of do- mestic utensils, packaging materials, children’s toys and so on. These materials are made by Ziegler-Natta* or Philipps’ catalysis using titanium and chro- mium respectively. However, transition metal compounds are used as catalysts in the synthesis of synthetic rubbers and other polymers, and of a variety of simple compounds used as industrial solvents or intermediates. For example alcohols are made from olefins, carbon monoxide and hydrogen by use of cobalt or rhodium catalysts, acetic acid is made by carbonylation of methanol using rhodium catalysts and acrylonitrile is dimerised to adiponitrile (for nylon) by nickel catalysts. We should also not forget that the huge quantities of petroleum hydrocarbons processed by the oil and petrochemical industry are re-formed over platinum, platinum-rhenium or platinum-germanium sup- ported on alumina. -
The Correspondence of Julius Haast and Joseph Dalton Hooker, 1861-1886
The Correspondence of Julius Haast and Joseph Dalton Hooker, 1861-1886 Sascha Nolden, Simon Nathan & Esme Mildenhall Geoscience Society of New Zealand miscellaneous publication 133H November 2013 Published by the Geoscience Society of New Zealand Inc, 2013 Information on the Society and its publications is given at www.gsnz.org.nz © Copyright Simon Nathan & Sascha Nolden, 2013 Geoscience Society of New Zealand miscellaneous publication 133H ISBN 978-1-877480-29-4 ISSN 2230-4495 (Online) ISSN 2230-4487 (Print) We gratefully acknowledge financial assistance from the Brian Mason Scientific and Technical Trust which has provided financial support for this project. This document is available as a PDF file that can be downloaded from the Geoscience Society website at: http://www.gsnz.org.nz/information/misc-series-i-49.html Bibliographic Reference Nolden, S.; Nathan, S.; Mildenhall, E. 2013: The Correspondence of Julius Haast and Joseph Dalton Hooker, 1861-1886. Geoscience Society of New Zealand miscellaneous publication 133H. 219 pages. The Correspondence of Julius Haast and Joseph Dalton Hooker, 1861-1886 CONTENTS Introduction 3 The Sumner Cave controversy Sources of the Haast-Hooker correspondence Transcription and presentation of the letters Acknowledgements References Calendar of Letters 8 Transcriptions of the Haast-Hooker letters 12 Appendix 1: Undated letter (fragment), ca 1867 208 Appendix 2: Obituary for Sir Julius von Haast 209 Appendix 3: Biographical register of names mentioned in the correspondence 213 Figures Figure 1: Photographs -
Alkali Metals- Group 1 (IA)
Alkali Metals- Group 1 (IA) The alkali metals make up Group 1 of the periodic table. This family consists of the elements lithium, sodium, potassium, rubidium, cesium, and francium (Li, Na, K, Rb, Cs, and Fr, respectively). Group one elements share common characteristics. They are all soft, silver metals. Due to their low ionization energy, these metals have low melting points and are highly reactive. The reactivity of this family increases as you move down the table. Alkali metals are noted for how vigorously they react with water. Due to this, they are often stored in mineral oil and are not found in their elemental forms in nature. These characteristics can be explained by examining the electronic structure of each element in this group. Alkali metals have one valence electron. They readily give up this electron to assume the noble gas configuration as a cation. This makes the elements in this group highly reactive. History Explore the discoverer's biography, including general facts about his life and anecdotes regarding how he made this particular discovery. Also see other significant scientific discoveries built largely on this concept and other real-world applications in history that may not still be relevant. Discoverer/Developer See each tab for individual information about the discoverer of each element. Lithium Lithium was discovered in 1817 by Johan August Arfwedson. Arfwedson was born in 1792 to a wealthy family in Sweden. At a young age he attended the University of Uppsala and earned degrees in law and mineralogy. His interest in minerals is what led to his discovery of lithium. -
Robert Wilhelm Bunsen Und Sein Heidelberger Laboratorium Heidelberg, 12
Historische Stätten der Chemie Robert Wilhelm Bunsen und sein Heidelberger Laboratorium Heidelberg, 12. Oktober 2011 Gesellschaft Deutscher Chemiker 1 Mit dem Programm „Historische Stätten der Chemie“ würdigt Robert Wilhelm Bunsen – die Gesellschaft Deutscher Chemiker (GDCh) Leistungen von geschichtlichem Rang in der Chemie. Als Orte der Erinnerung eine biographische Skizze werden Wirkungsstätten beteiligter Wissenschaftlerinnen und Wissenschaftler in einem feierlichen Akt ausgezeichnet. Eine Broschüre bringt einer breiten Öffentlichkeit deren wissenschaft- Bunsen war einer der Wegbereiter der Physikalischen Chemie liches Werk näher und stellt die Tragweite ihrer Arbeiten im und ein bedeutender Vertreter der anorganisch-analytischen aktuellen Kontext dar. Ziel dieses Programms ist es, die Erinne- Richtung. Seine wissenschaftliche Bedeutung liegt in der Ent- rung an das kulturelle Erbe der Chemie wach zu halten und die wicklung und Perfektionierung von Methoden und Instrumen- Chemie mit ihren historischen Wurzeln stärker in das Blickfeld ten. Diese Arbeitsschwerpunkte hat Bunsen von Beginn seiner der Öffentlichkeit zu rücken. Karriere an verfolgt und systematisch ausgebaut. Am 12. Oktober 2011 gedenken die GDCh, die Deutsche 1811 als jüngster von vier Söhnen einer bürgerlichen protestan- Bunsen-Gesellschaft für Physikalische Chemie (DBG), die Che- tischen Familie in Göttingen geboren, begann Bunsen dort 1828 mische Gesellschaft zu Heidelberg (ChGzH) und die Ruprecht- das Studium der Naturwissenschaften. Seine wichtigsten Lehrer Karls-Universität -
Early Russian Organic Chemists and Their Legacy
SpringerBriefs in Molecular Science Early Russian Organic Chemists and Their Legacy Bearbeitet von David Lewis 1. Auflage 2012. Taschenbuch. xii, 136 S. Paperback ISBN 978 3 642 28218 8 Format (B x L): 15,5 x 23,5 cm Gewicht: 237 g Weitere Fachgebiete > Chemie, Biowissenschaften, Agrarwissenschaften > Chemie Allgemein > Geschichte der Chemie Zu Inhaltsverzeichnis schnell und portofrei erhältlich bei Die Online-Fachbuchhandlung beck-shop.de ist spezialisiert auf Fachbücher, insbesondere Recht, Steuern und Wirtschaft. Im Sortiment finden Sie alle Medien (Bücher, Zeitschriften, CDs, eBooks, etc.) aller Verlage. Ergänzt wird das Programm durch Services wie Neuerscheinungsdienst oder Zusammenstellungen von Büchern zu Sonderpreisen. Der Shop führt mehr als 8 Millionen Produkte. Chapter 2 Beginnings 2.1 Introduction At the start of the twentieth century, organic chemistry was not yet 75 years old as a separate and legitimate sub-discipline of the science. Considerable progress had been made in these first seven decades, and the stage was set for the dramatic advances in the science to come in the following century. Most practicing organic chemists are familiar with many of the great German, French and English organic chemists whose work helped the fledgling discipline grow, but few are familiar with the role that Russian organic chemists of the nineteenth and early twentieth century played in the development of the science. And this is in spite of the fact that many of the named rules and reactions that one studies in the first course in organic chemistry are, in fact, of Russian origin. It is the intent of this book to help rectify that deficiency. -
The Demographics of Massive Black Holes
The fifth element: astronomical evidence for black holes, dark matter, and dark energy A brief history of astrophysics • Greek philosophy contained five “classical” elements: °earth terrestrial; subject to °air change °fire °water °ether heavenly; unchangeable • in Greek astronomy, the universe was geocentric and contained eight spheres, seven holding the known planets and the eighth the stars A brief history of astrophysics • Nicolaus Copernicus (1473 – 1543) • argued that the Sun, not the Earth, was the center of the solar system • the Copernican Principle: We are not located at a special place in the Universe, or at a special time in the history of the Universe Greeks Copernicus A brief history of astrophysics • Isaac Newton (1642-1747) • the law of gravity that makes apples fall to Earth also governs the motions of the Moon and planets (the law of universal gravitation) ° thus the square of the speed of a planet in its orbit varies inversely with its radius ⇒ the laws of physics that can be investigated in the lab also govern the behavior of stars and planets (relative to Earth) A brief history of astrophysics • Joseph von Fraunhofer (1787-1826) • discovered narrow dark features in the spectrum of the Sun • realized these arise in the Sun, not the Earth’s atmosphere • saw some of the same lines in the spectrum of a flame in his lab • each chemical element is associated with a set of spectral lines, and the dark lines in the solar spectrum were caused by absorption by those elements in the upper layers of the sun ⇒ the Sun is made of the same elements as the Earth A brief history of astrophysics ⇒ the Sun is made of the same elements as the Earth • in 1868 Fraunhofer lines not associated with any known element were found: “a very decided bright line...but hitherto not identified with any terrestrial flame. -
Streamlining Alloy Design and Thermo-Mechanical Processing Parameters for High Strength Line Pipe Steels and Hot Rolled Microall
University of Texas at El Paso DigitalCommons@UTEP Open Access Theses & Dissertations 2018-01-01 Streamlining Alloy Design And Thermo- Mechanical Processing Parameters For High Strength Line Pipe Steels And Hot Rolled Microalloyed Steels: Process - Structure - Property Paradigm Venkata Vignesh Natarajan University of Texas at El Paso, [email protected] Follow this and additional works at: https://digitalcommons.utep.edu/open_etd Part of the Materials Science and Engineering Commons, and the Mechanics of Materials Commons Recommended Citation Natarajan, Venkata Vignesh, "Streamlining Alloy Design And Thermo-Mechanical Processing Parameters For High Strength Line Pipe Steels And Hot Rolled Microalloyed Steels: Process - Structure - Property Paradigm" (2018). Open Access Theses & Dissertations. 129. https://digitalcommons.utep.edu/open_etd/129 This is brought to you for free and open access by DigitalCommons@UTEP. It has been accepted for inclusion in Open Access Theses & Dissertations by an authorized administrator of DigitalCommons@UTEP. For more information, please contact [email protected]. STREAMLINING ALLOY DESIGN AND THERMO-MECHANICAL PROCESSING PARAMETERS FOR HIGH STRENGTH LINE PIPE STEELS AND HOT ROLLED MICROALLOYED STEELS: PROCESS – STRUCTURE – PROPERTY PARADIGM VENKATA VIGNESH NATARAJAN Doctoral Program in Materials Science and Engineering APPROVED: Devesh Misra, Ph.D., Chair Srinivasa Rao Singamaneni, Ph.D. Guikuan Yue, Ph.D. Charles Ambler, Ph.D. Dean of the Graduate School Copyright © by Venkata Vignesh Natarajan 2018 DEDICATION -
Fraunhofer Lines and the Composition of the Sun 1 Summary 2 Papers and Datasets 3 Scientific Background
Fraunhofer lines and the composition of the Sun 1 Summary The purpose of this lab is for you to examine the spectrum of the Sun, to learn about the composition of the Sun (it’s not just hydrogen and helium!), and to understand some basic concepts of spectroscopy. 2 Papers and datasets These documents are all available on the course web page. • Low resolution spectrum of the Sun (from the National Solar Observatory) • Absorption lines of various elements (from laserstars.org and NASA’s Goddard Space Flight Center) • Table of abundances in the Sun 3 Scientific background 3.1 Spectroscopy At its most basic level, spectroscopy is simply splitting light up into different wavelengths. The classic example is a prism: white light goes in, and a rainbow comes out. Spectroscopy for physics and astronomy usually drops the output onto some kind of detector that records the flux at different wavelengths as a “stripe” across the detector. In other words, the output is a data table that lists the measured flux as a function of pixel number. An critical aspect of spectroscopy is wavelength calibration: what wavelength corresponds to which pixel number? Note that that relationship does not have to be — and is often not — linear. That is, the mapping of wavelength to pixel is not a linear relationship, but something more complicated. 3.2 The Sun The Sun is mostly hydrogen and after that mostly helium. You have learned about the fusion processes in the Sun and in other stars that gradually convert hydrogen to helium and then, for some stars, onward to carbon, nitrogen, and oxygen (CNO cycle), and further upward through the periodic table to iron. -
Chemistry Is All Around Us
Chemistry is all around us. Everyone can and should understand basic chemistry. The Story Apart from those wanting to become chemists, students Central wanting to become doctors, nurses, physicists, Science Cover nutritionists, geologists, and pharmacists all need to study chemistry. It is important to remember that the Chemistry importance of chemistry would not be diminished BIMAN BASU over time; rather it will continue to remain a That is not all. There would be no drugs a science. It was primarily directed at efforts promising career prospect. – painkillers, antacids, or antibiotics – no to turn all kinds of substances into the polyester fibre or nylon stockings, no precious metal gold by early chemists, who stainless steel, no sugar-free soft drinks, were known as alchemists. We have heard IGHT from the moment we get up in even no Diwali illumination and fireworks about the “philosopher’s stone” using which the morning till we go to bed at without chemistry. Without chemistry, we the alchemists sought to turn any metal night, we come intimately close to R would not have such items as computers, into gold. Of course it was a silly thought, chemistry and things related to it. The CDs, DVDs, iPods, fuel for vehicles, oil to because no one can really turn one toothpaste we use to clean our teeth, the cook, refrigeration units, radios, televisions, element into another by mere touch! Still, toilet soap, shampoo, and plastic buckets batteries, and so much more. So, then, the alchemists made important we use to take bath, the plastic comb -
SCIENTIFIC CASE: What Are the Stars Made Of?1
Ages: 15 to 17 years old SCIENTIFIC CASE: What are the stars made of?1 Team members Writer: ____________________________________________________ Computer technician: __________________________________________________ Reader: ____________________________________________________ Spokesperson: ____________________________________________________ Ambassador: ___________________________________________________ Context In 1671, Isaac Newton (1643-1727) described how, when a ray of sunlight goes through a crystal prism with a particular angle, it splits showing different colours.. Fig.1: Newton's Experimentum Crucis (Grusche 2015) -fragment | Fig.2: Prism splitting white light into spectral colours. 1 Educational material manufacturated by “Asociación Planeta Ciencias” under the initiative and coordination of the European Space Agency inside the CESAR program framework. Source: Wikimedia.org . Newton also explained that light coming from stars other than the Sun would also be separated by a prism in a similar fashion. Fig 3. Comparison between a Fig 4. Joseph von Fraunhofer (1787 - 1826) prism and a diffraction grating. Source: Museo Alemán de Munich Source: Wikimedia.org More than a century later, in the first years of the 19th Century, Joseph von Fraunhofer (1787-1826) took a big step – he replaced the prism by a more effective optical component: a diffraction grating. This grating had de ability to separate or diffract light into several, more distinguishable rays. That way, Fraunhofer could split sunlight with a better resolution and, when he did, he found out something extraordinary: light wasn't continuous, but had black lines along the spectrum. Fig 5. Fraunhofer's lines. Source: Wikimedia.org So, what do these black lines mean? The Sun emits light due to its high temperature but, on its way from the inside to space, elements in the star absorb part of that light. -
Obituary. Sir Edward Frankland
OBITUARY. SIR EDWARDFRANKLAND. E are again called upon to note the departure of a CO- W worker and master in our chosen field of science. Eulogy is not necessary. The good he has achieved lives after him, and we would merely note that the researches of Sir Edward Frankland. extending over a period of thirty years, relate to work in pure, applied, and physical chemistry. Those in pure chemistry were conducted at first in the laboratories of Playfair, Bunsen, and Liebig. They include subjects related to each other as follows : the conversion of the cyanogen group into the carboxyl group ; the change of the alkyl cyanides to the corresponding organic acids, the saponification of ethyl cyanide was announced by Edward Frankland and Hermann Kolbe when they were fellow assistants in Playfair’s laboratory in 1845. Although this reaction was not then pursued beyond the mono- basic acids, others applied it successfully in other directions. Then followed the action of metallic potassium upon ethyl cyanide and the polymerization of the latter, the isolation of the organic radicals, and the discovery of the organo-metallic com- pounds. Of these, which were investigated by Frankland throughout his scientific career, were zinc methyl and zinc ethyl, in. the study of which the author remarks: “ I had not pro- ceeded far in the investigation of these compounds before the facts brought to light began to impress upon me the existence of a fixity in the maximum combining value or capacity of saturation in the metallic elements which had never before been suspected.” The ready introduction of negative chlorine into bodies for a more electropositive constituent is a fact to which we give little thought. -
Louis Pasteur
Britannica LaunchPacks | Louis Pasteur Louis Pasteur For Grades 6-8 This Pack contains: 5 ARTICLES 4 IMAGES 1 VIDEO © 2020 Encyclopædia Britannica, Inc. 1 of 47 Britannica LaunchPacks | Louis Pasteur Louis Pasteur (1822–95). The French chemist Louis Pasteur devoted his life to solving practical problems of industry, agriculture, and medicine. His discoveries have saved countless lives and created new wealth for the world. Among his discoveries are the pasteurization process and ways of preventing silkworm diseases, anthrax, chicken cholera, and rabies. Louis Pasteur. Archives Photographiques, Paris Pasteur sought no profits from his discoveries, and he supported his family on his professor’s salary or on a modest government allowance. In the laboratory he was a calm and exact worker; but once sure of his findings, he vigorously defended them. Pasteur was an ardent patriot, zealous in his ambition to make France great through science. Scholar and Scientist Louis Pasteur was born on Dec. 27, 1822, in Dôle, France. His father was a tanner. In 1827 the family moved to nearby Arbois, where Louis went to school. He was a hard-working pupil but not an especially brilliant one. When he was 17 he received a degree of bachelor of letters at the Collège Royal de Besançon. For the next three years he tutored younger students and prepared for the École Normale Supérieure, a noted teacher-training college in Paris. As part of his studies he investigated the crystallographic, chemical, and optical properties of © 2020 Encyclopædia Britannica, Inc. 2 of 47 Britannica LaunchPacks | Louis Pasteur various forms of tartaric acid.