Posts Tagged ‘2-Norbornyl cation’
Thursday, March 23rd, 2017
It is not only the non-classical norbornyl cation that has proved controversial in the past. A colleague mentioned at lunch (thanks Paul!) that tri-coordinate group 14 cations such as R3Si+ have also had an interesting history.[1] Here I take a brief look at some of these systems.
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References
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J.B. Lambert, Y. Zhao, H. Wu, W.C. Tse, and B. Kuhlmann, "The Allyl Leaving Group Approach to Tricoordinate Silyl, Germyl, and Stannyl Cations", Journal of the American Chemical Society, vol. 121, pp. 5001-5008, 1999. http://dx.doi.org/10.1021/ja990389u
Tags:2-Norbornyl cation, Carbocations, chemical bonding, Chemistry, metal, Physical organic chemistry, Reactive intermediates, search query, tri-coordinate
Posted in crystal_structure_mining | 8 Comments »
Friday, March 10th, 2017
George Olah passed away on March 8th. He was part of the generation of scientists in the post-war 1950s who had access to chemical instrumentation that truly revolutionised chemistry. In particular he showed how the then newly available NMR spectroscopy illuminated structures of cations in solvents such “Magic acid“. The obituaries will probably mention his famous “feud” with H. C. Brown over the structure of the norbornyl cation (X=CH2+), implicated in the mechanism of many a solvolysis reaction that characterised the golden period of physical organic chemistry just before and after WWII.
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Tags:2-Norbornyl cation, aqueous solutions, Chemical bond, chemical instrumentation, Chemistry, George Andrew Olah, George Olah, Interesting chemistry, Ion association, Magic acid, Michael Dewar, Molecule, Nature, Physical organic chemistry, Reactive intermediates, spectroscopy
Posted in Uncategorised | 17 Comments »