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Bromination of Hydrocarbons The light initiated bromination of pentane, hexane isomers, alkyl benzenes and a comparison of bromination of pentane and pentene are demonstrated.
Introduction of Differential Scanning Calorimetry in a General Chemistry Laboratory Course: Determination of Thermal Properties of Organic HydrocarbonsRonald DAmelia, Thomas Franks, and William F. Nirode Differential scanning calorimetry (DSC) is a rugged, easy-to-use instrumental method for thermal analysis determinations. The work described herein discusses the use of DSC in a general chemistry laboratory course to determine thermal properties such as melting points, ?fusionH, ?fusionS, and introduce the concept of polymorphism for organic hydrocarbons. DAmelia, Ronald; Franks, Thomas; Nirode, William F. J. Chem. Educ.2007, 84, 453.
Alkanes / Cycloalkanes |
Instrumental Methods |
Physical Properties |
Thermal Analysis |
Thermodynamics |
Calorimetry / Thermochemistry
Entropy and the Shelf Model: A Quantum Physical Approach to a Physical PropertyArnd H. Jungermann A quantum physical approach relying on energy quantization leads to three simple rules which are the key to understanding the physical property described by molar entropy values. Jungermann, Arnd H. J. Chem. Educ.2006, 83, 1686.
Alcohols |
Alkanes / Cycloalkanes |
Carboxylic Acids |
Covalent Bonding |
Ionic Bonding |
Physical Properties |
Quantum Chemistry |
Thermodynamics
More on the Nature of ResonanceRobert C. Kerber The author continues to find the use of delocalization preferable to resonance. Kerber, Robert C. . J. Chem. Educ.2006, 83, 1291.
Unsaturated HydrocarbonsEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Alkenes |
Alkynes
Coumarin, Naphthalene, and Additional Polycyclic Aromatic HydrocarbonsWilliam F. Coleman The featured molecules this month are drawn from two papers. The first, "One-Pot Synthesis of 7-Hydroxy-3-carboxycoumarin in Water", is a Green Chemistry feature by Fringuelli, Piermatti, and Pizzo. The three-dimensional versions of the molecules in the synthesis of the coumarin derivative are directly tied to the reaction scheme included in the paper, opening the possibility of showing large numbers of complex synthetic pathways in this manner.The second paper is "Determining the Carbon-Carbon Distance in an Organic Molecule with a Ruler" by Simoni, Tubino, and Ricchi. This article describes an experiment to determine the size of a naphthalene molecule, using an extension of classic experiments for determining molecular size and Avogadro's number. While the structure of naphthalene will come as no surprise to most students, the molecule collection also includes additional polycyclic aromatic hydrocarbons (PAHs) that can be used to introduce students to the environmental and health issues related to these molecules.
Molecular Modeling |
Molecular Properties / Structure |
Aromatic Compounds
Aromatic HydrocarbonsEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
