Energy Storage Elements
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This lecture continues the discussion of the HOMO/LUMO view of chemical reactivity by focusing on ways of recognizing whether a particular HOMO should be unusually high in energy (basic), or a particular LUMO should be unusually low (acidic). The approach is illustrated with BH3, which is both acidic and basic and thus dimerizes by forming unusual "Y" bonds. The low LUMOs that make both HF and CH3F acidic are analyzed and compared...more
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This lecture is devoted to discussion of the wonderful Quantum world. Classical Mechanics, in spite of all of its impressive predictive power, fails to explain many microscopic behaviors. This led to the development of Quantum Mechanics, where electrons orbit nuclei in discrete energy levels, light can behave as a particle, and particles behave as waves. The location of microscopic particles can only be expressed in terms of...more
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Kepler's Laws, Elliptical Orbits, Change of Orbits, and the famous passing of a Ham Sandwich by astronauts in orbit. Kepler's three Laws summarize the motion of the planets in our solar system. Following Newton's law of universal gravitation, the conservation of angular momentum and mechanical energy allow us to calculate the semimajor axis of the elliptical orbits, the orbital period and other orbital parameters. All we have to know is...more
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Professor Kleiner discusses the increasing size of Roman architecture in the second and third centuries A.D. as an example of a "bigger is better" philosophy. She begins with an overview of tomb architecture, a genre that, in Rome as in Ostia, embraced the aesthetic of exposed brick as a facing for the exteriors of buildings. Interiors of second-century tombs, Professor Kleiner reveals, encompass two primary groups -- those that are...more
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After mentioning some legal implications of chirality, the discussion of configuration concludes using esomeprazole as an example of three general methods for producing single enantiomers. Conformational isomerism is more subtle because isomers differ only by rotation about single bonds, which requires careful physico-chemical consideration of energies and their relation to equilibrium and rate constants. Conformations have their own...more
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Professor Sylvia Ceyer discusses hybridization and chemical bonding. Using methyl nitrate as an example, Professor Ceyer describes how to find the lowest energy Lewis structure and explains bond symmetry, hybrid orbitals, and atomic orbitals. Moving onto intramolecular interactions, the discussion breaks down the origin of a bad hair day: hydrogen bonding, water, and keratin.
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Dominic Orr, CEO of Aruba Networks, wrestles with the definition of work-life balance for people who are deeply engaged by their work. Orr recognizes that it can be difficult to separate work and life but that we must still make room for relationships that matter to us and ultimately this comes down to carefully managing and allocating our time and energy.
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Professor Sylvia Ceyer breaks down the Octet Rule covering molecules with an odd number of valence electrons, octet deficient molecules, and valence shell expansion. She concludes with ionic bonds as a classical model and mechanism discussing the Harpoon Mechanism, limitations of the model, and energy of interaction vs. the radius of an electron.
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January 7, 2009 lecture by Lee Schipper for the Woods Energy Seminar (ENERGY301). In his talk "When the Rubber Hits the Road: The Real Story on Fuel Economy in the US and other Developed Countries, with Implications for Developing Asia," Schipper discusses better and more realistic fuel economy options in the US and other industrialized nations.
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February 5, 2009 lecture by Nicholas Jenkins for the Woods Energy Seminar (ENERGY301). In his talk "Smart Grids and De-Carbonising the Power Sector," Jenkins discusses the progress and implementation of smart power grids using cost-effective analysis.
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Fundraising is simply an energy transfer to further your projects, says entrepreneur and X PRIZE founder Peter Diamandis. It's also the most critical skill an entrepreneur can have. When trying to raise funds, it's critical to remember that you have to ask for what you want, and that you have to give others the opportunity to be involved. And, says Diamandis, never walk away from a potential funder without something; whether it's dollars,...more
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At the beginning, the product was an 'internet sponge' that could absorb information from a computer and be carried around on a keychain. As time went on, the idea went through lots of changes to become what the Hiptop is today. Hershenson describes the formation of the product as a critical mass process: enough stuff (people, money, time) gets scrunched together until the product comes out like a giant release of energy.
