Posts Tagged ‘Nick Greeves’
Friday, December 11th, 2015
You might have noticed the occasional reference here to the upcoming centenary of the publication of Gilbert N. Lewis’ famous article entitled “The atom and the molecule“.[1] A symposium exploring his scientific impact and legacy will be held in London on March 23, 2016, exactly 70 years to the day since his death. A list of the speakers and their titles is shown below; there is no attendance fee, but you must register as per the instructions below.
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References
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G.N. Lewis, "THE ATOM AND THE MOLECULE.", Journal of the American Chemical Society, vol. 38, pp. 762-785, 1916. http://dx.doi.org/10.1021/ja02261a002
Tags:Alan Dronsfield, Clark Landis, Durham, France, Gilbert N. Lewis, Interesting chemistry, John Nicholson, Julia Contreras-Garcia, Liverpool, London, Michael Mingos, Nick Greeves, organic chemist, Oxford, Patrick Coffey, professor, Robin Hendry, Royal Society of Chemistry Historical Group, United Kingdom, United States
Posted in Uncategorised | 1 Comment »
Saturday, March 8th, 2014
The diazo-coupling reaction dates back to the 1850s (and a close association with Imperial College via the first professor of chemistry there, August von Hofmann) and its mechanism was much studied in the heyday of physical organic chemistry.[1] Nick Greeves, purveyor of the excellent ChemTube3D site, contacted me about the transition state (I have commented previously on this aspect of aromatic electrophilic substitution). ChemTube3D recruits undergraduates to add new entries; Blue Jenkins is one such adding a section on dyes.
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References
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S.B. Hanna, C. Jermini, H. Loewenschuss, and H. Zollinger, "Indices of transition state symmetry in proton-transfer reactions. Kinetic isotope effects and Bronested's .beta. in base-catalyzed diazo-coupling reactions", Journal of the American Chemical Society, vol. 96, pp. 7222-7228, 1974. http://dx.doi.org/10.1021/ja00830a009
Tags:covalent systems, first professor, free energy, Imperial College, lowest energy pose, Nick Greeves, professor of chemistry
Posted in reaction mechanism | 2 Comments »
Friday, July 20th, 2012
I was first taught curly arrow pushing in 1968, and have myself taught it to many a generation of student since. But the other day, I learnt something new. Nick Greeves was kind enough to send me this link‡to the origin of curly arrow pushing in organic chemistry, where the following diagram is shown and Alan Dronsfield sent me two articles he co-wrote on the topic (T. M. Brown, A. T. Dronsfield and P. J. T Morris, Education in Chemistry, 2001, 38, 102-104, 107 and 2003, 40, 129-134);† thanks to both of them.
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Tags:Alan Dronsfield, Historical, Indiana, Nick Greeves, Reaction Mechanism, Robert Robinson, Tutorial material
Posted in Curly arrows | 12 Comments »