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Activation of Carbon-Hydrogen and Hydrogen-Hydrogen Bonds by Copper-Nitrenes: A Comparison of Density Functionality Theory with Single- and Multireference Correlation Consistent Composite Approaches
Article on a comparison of density functional theory with single- and multireference correlation consistent composite approaches (ccCA).
Theoretical Estimation of Vibrational Frequencies Involving Transition Metal Compounds
This article discusses the theoretical estimation of vibrational frequencies involving transition metal compounds.
Quantitative Computational Thermochemistry of Transition Metal Species
This article discusses quantitative computational thermochemistry of transition metal species. The correlation consistent Composite Approach (ccCA), which has been shown to achieve chemical accuracy (±1 kcal mol⁻¹) for a large benchmark set of main group and s-block metal compounds, is used to compute enthalpies of formation for a set of 17 3d transition metal species.
Modeling the Deposition of Metal Atoms on a p-Type Organometallic Conductor: Implications for Stability and Electron Transfer
Article discussing modeling the deposition of metal atoms on a p-Type organometallic conductor and implications for stability and electron transfer.
Enthalpy of Formation of the Cyclohexadienyl Radical and the C-H Bond Enthalpy of 1,4-Cyclohexadiene: An Experimental and Computational Re-Evaluation
This article discusses the enthalpy of formation of the cyclohexadienyl radical and the C-H bond enthalpy of 1,4-cyclohexadiene.
Homogenization of Magnetodielectric Photonic Crystals
This article discusses homogenization of magnetodielectric photonic crystals.
Speed of Sound in Periodic Elastic Composites
In this article, the authors consider the low-frequency limit (homogenization) for propagation of sound waves in periodic elastic medium (phononic crystals).
Performance of Density Functional Theory for 3d Transition Metal-Containing Complexes: Utilization of the Correlation Consistent Basis Sets
Article discussing the performance of density functional theory for 3d transition metal-containing complexes and the utilization of the correlation consistent basis sets.
Rediscovery of the Elements: Montpellier and Bromine
Article recounting the history of the element Bromine, including its discovery in the salt lagoons of the Montpellier region of France by Antoine-Jérome Balard. Maps of the region and of Balard's birthplace are presented.
The Gas That Wouldn't Burn
Article describing how Alpha Chi Sigma members were involved with the events described on a pictured Kansas historical marker relating to the discovery of helium in a deposit of natural gas.
Rediscovery of the Elements: Germanium
Article recounting the history of the element Germanium, including background material on mining in Germany and the isolation of Germanium by Clemens A. Winkler. Tourist information is provided regarding Winkler's laboratory and mines open to the public as museums.
Rediscovery of the Elements: Carl Wilhelm Scheele
Article describing the career and discoveries of Carl Wilhelm Scheele. Tourist information regarding locations important to Scheele's life are visited and discussed.
Rediscovery of the Elements: Thorium
Article recounting the discovery of the element Thorium in Norway by Hans Morten Thrane Esmark. Maps and tourist information regarding the area are provided.
Rediscovery of the Elements: Joseph Priestley
Article describing the career and discoveries of Joseph Priestley. Tourist information regarding locations important to Priestley's life are visited and discussed.
Rediscovery of the Elements: Soddy and Isotopes
Article describing Frederick Soddy's career and research of isotopes. Tourist information is included for areas significant to Soddy's life and work.
Rediscovery of the Elements: Jöns Jakob Berzelius
Article describing the life and career of Jöns Jakob Berzelius. Tourist information regarding locations significant to his history is included.
Rediscovery of the Elements: Yttrium and Johan Gadolin
Article describing the life and career of Johan Gadolin. Tourist information regarding locations significant to his history is included.
Rediscovery of the Elements: Ruthenium
Article describing the discovery of platinum in Russia and the history of ruthenium. Tourist information regarding sites pertinent to this history are included.
A Dream of Toasted Cheese, the Bunsen Burner, and Beatrix Potter
Front cover of The Hexagon, featuring a painting by Beatrix Potter. In the painting, a mouse wearing glasses sits on the intake tube of a lit Bunsen burner and reads a red book. Behind this is a group of unpainted mice using chemistry equipment. "A Dream of Toasted cheese" is written to the left of the burner's flame, and a note concerning NH3 is written to the bottom left. Above these images is the title of the magazine. Above that are pictures concerning other articles. The inside cover features a table of contents, work credits, and an introductory editorial.
Rediscovery of the Elements: The Curious Case of Vestium
Article describing Jedrzej Sniadecki's career and his flawed findings regarding vestium. Tourist information is included for areas significant to Sniadecki's life and work.
Rediscovery of the Elements: Riddarhyttan, Sweden
Article describing the authors' tour through Riddarhyttan, Sweden, to visit the areas where cerium and cobalt were discovered. Maps and photographs of pertinent locations are located as well as a history of the area and the elements discovered there.
Rediscovery of the Elements: The Undiscovery of Vanadium
Article describing the how the original vanadium sample was misanalysed and identified as chromium. Includes tourist information regarding Paris, France.
Rediscovery of the Elements: Vanadium
Article describing the discovery of Vanadium and tracing the footsteps of the discoverers.
Rediscovery of the Elements: Gallium
Article describing the discovery of the element gallium. The authors travel to sites pertinent to the history of gallium, including the home and laboratory of its discoverer and the location from which it was procured.
Statue of Leonardo da Vinci
Front page of the Fall 2010 issue of The Hexagon, which features a stone statue of Leonardo da Vinci next to three photographs from articles. The inside cover has a table of contents, a list of staff, an editorial, and a description of the cover.
Rediscovery of the Elements: Fluorine
Article describing the isolation of elemental fluorine. Tourist information is given regarding locations pertinent to the element's history.
Rediscovery of the Elements: Moseley and Atomic Numbers
Article describing the career of Henry Moseley and his findings regarding atomic numbers. Tourist information is included for areas relevant to Moseley.
The Statue of Copernicus
Front cover of the Summer 2009 issue of The Hexagon, featuring a statue of Copernicus sitting on a block, wearing a flowing robe, and holding a compass up to a heliocentric model. The next page contains a table of contents, a staff list, and an editorial regarding the twentieth anniversary of the events at Tiananmen Square.
Rediscovery of the Elements: Courtois and Iodine
Article describing the history of iodine, including its discovery by Bernard Courtois while during the production of saltpeter. Tourist information regarding pertinent locations is included.
Rediscovery of the Elements: Strontium
Article describing the history of the element strontium from its discovery in Strontian, Scotland, to its early uses in English medicine. Maps with directions and photographs of pertinent locations are included.
Riddarhyttan City Motif
First page of The Hexagon of Alpha Chi Sigma. The blue cover features a black and white drawing of a medieval knight wearing mail and a tunic with a cross motif. He is holding a shield that bears the image of a stone building with flames shooting out of the roof. The word "Riddarhyttan" appears on a banner above the knight's head. Two photographs are arranged to the left of the knight, with text and an image of a computer mouse to the right. The next page includes a table of contents, an editorial, and a list of contributors. Near the bottom of this second page is a piece labeled "On the Cover," which describes the previous page.
Rediscovery of the Elements: The Road to Karlsruhe
Article describing the history of atomic weight and the events leading up to the Karlsruhe Congress of chemists. The authors visited several sites pertinent to these events and offer tourist information.
Rediscovery of the Elements: Helium
Article describing the discovery of helium in the sun and on Earth via spectroscopy. Tourist information is included for areas significant to those involved.
Rediscovery of the Elements: Thallium, Crookes, and Lamy
Article describing the nearly simultaneous discovery of thallium by William Crookes and Claude-August Lamy. Tourist information is included for areas in London, England, and Lille, France, that are significant to the lives of these two men.
Rediscovery of the Elements: Tellurium and Fata Baii (Fascebanya), Romania.
Article describing the discovery of the element tellurium. The authors travel through Romania to visit the Transylvanian mine where tellurium was discovered. They also visit the Brukenthal Museum of Sibiu and describe the museum's mineral collection.
Rediscovery of the Elements: Madam Curie
Article describing the career of Marie Curie and the discovery of polonium and radium. Tourist information regarding the areas where the Curies were most active are included.
Rediscovery of the Elements: The Platinum Metals
Article describing the history of the platinum metals, from its discovery in the New World and subsequent experiments in Europe. Tourist information is provided regarding areas pertinent to the history of platinum.
Rediscovery of the Elements: Rutherford and Radon
Article describing the history of the discovery of radon. Tourist information is included for areas significant to radon and its discoverers.
Rediscovery of the Elements: Johann Wolfgang Döbereiner
Article describing the life of Johann Wolfgang Döbereiner and his attempts to systematically organize the elements. Tourist information regarding locations significant to his history is included.
Rediscovery of the Elements: Titanium, Manaccan, Cornwall, England
Article wherein James and Virginia Marshall visit Manaccan, England, to explore the site where titanium was first discovered. The area is described, as well as the man who discovered titanium, Reverend William Gregor.
Rediscovery of the Elements: Aluminum
Article describing the history of aluminum, from its use in alum to its isolation. Tourist information is given regarding locations pertinent to aluminum.
Rediscovery of the Elements: Hafnium
Article describing the search for element 72, the scientists involved, and the nationalist politics surrounding the discovery. Tourist information is included for areas significant to the history of hafnium.
Rediscovery of the Elements: Mineral Waters and Spectroscopy
Article describing the career of Robert Bunsen and the history of spectroscopy and its use in mineral analysis. The discovery of cesium and rubidium using spectroscopy on mineral water is included. In addition, the authors offer tourist information regarding locations pertinent to Bunsen and certain mineral water springs.
The Story Behind the Cover
Article explaining the front cover of issue 3 of volume 99 of The Hexagon, which features a painting of mice around a Bunsen burner. James Marshall discusses the picture and how it relates to the history of chemistry.
Rediscovery of the Elements: Klaproth
Article describing the life and career of Martin Heinrich Klaproth, including his discoveries of uranium and zirconium. Tourist information regarding locations significant to his history is included.
Rediscovery of the Elements: The Periodic Table
Article recounting the history of the development of the Periodic Table. Sites pertinent to this development were visited by the authors, who provide related tourist information.
Rediscovery of the Elements: Paracelsus
Article describing the career and discoveries of Phillippus Aureolus Theophrastus Paracelsus Bombastus von Hohenheim. Tourist information regarding locations important to his life are visited and discussed.
Rediscovery of the Elements: The Second Discovery of Vanadium
Article describing how vanadium was "rediscovered" in Sweden and found to be identical to del Rio's sample. Includes tourist information regarding areas relevant to this portion of vanadium's history.
Foucault's Pendulum
Front cover of the Summer 2010 issue of The Hexagon featuring Foucault's pendulum in the Panthéon of Paris, France. A large weight hangs from the ceiling over a circular table with degrees written onto its surface. A round fence with hash marks and numbers surrounds the display. Columns and a raised statue of men are visible in the background. The inside cover features a table of contents, staff list, an editorial, and a description of the front cover.
Rediscovery of the Elements: Phosphoro di Bologna
Article recounting a visit to sites related to the discovery of phosphorescent stone (barium sulfide) in Bologna, Italy. Maps with driving directions are included.
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