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Chemistry 241 at DCChemistry is the central science.....
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Chemistry is the central science.....
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Chemistry 241 at DC | chemdc.blogspot.com Reviews
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Chemistry is the central science.....
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Chemistry 241 at DC: More EAS
http://chemdc.blogspot.com/2007/05/more-eas.html
Tuesday, May 01, 2007. The topic for yesterday was how to handle an EAS reaction when there are multiple substituents on the ring. Essentially, it boiled down to this - look at the directing effects of each substituent and determine the regiochemistry predicted by each. If they agree, life is good. If they disagree, then use the substituent that is more donating as the one that dominates the regiochemical outcome. 復活、スタービーチ！日本最大の友達探しサイトがついに復活、進化を遂げた新生スタビをやってみませんか？理想のパートナー探しの手助...なかなか彼氏、彼女が出来ない君達の深...
Chemistry 241 at DC: Friedel-Crafts
http://chemdc.blogspot.com/2007/05/friedel-crafts.html
Wednesday, May 02, 2007. Today was the final day of new material and it ended with a bang - the Friedel-Crafts alkylation and acylation reactions. These reactions involve the formation of C-C bond during EAS reactions. The carbon is made electrophilic by the reaction between an alkyl or acyl halide and a trihalo aluminum compound. The acylation is a better reaction (generally) than the alkylation because the resultant C is stabilized by resonance. Geаrs Of War attacheԁ to intelligence rofl ;-). Xbox-pers...
Chemistry 241 at DC: March 2007
http://chemdc.blogspot.com/2007_03_01_archive.html
Thursday, March 29, 2007. Even More Additions to C=C! We can't get enough of this addition of various species to alkenes. Yesterday was pretty much the final installment - addition of H2, ozonolysis and di-hydroxylation were examples of reactions that we just have to know, without mechanistic details. One reaction in which the mechanism is approachable was the radical synthesis of some classes of polymers (we used polystyrene as an example). Tuesday, March 27, 2007. More Alkenes as Nucleophiles. The reac...
Chemistry 241 at DC: February 2007
http://chemdc.blogspot.com/2007_02_01_archive.html
Wednesday, February 28, 2007. There is also a major difference in solvent requirements: in an SN2 reaction, polar protic solvents surround and stabilize the negatively charged nucleophile, slowing the reaction. In an SN1 reaction, you must have a polar protic solvent to stabilize the intermediate carbocation otherwise the energy level is too high and the reaction will not take place. Monday, February 26, 2007. Friday, February 23, 2007. Halogens, a rough day. We then covered halogens, both the manufactur...
Chemistry 241 at DC: Dienes
http://chemdc.blogspot.com/2007/04/dienes.html
Tuesday, April 17, 2007. The second topic was the addition of HBr to a diene. We saw the possibility of two products and determined how to tweak the conditions (temperature) to allow us to get the kinetic or thermodynamic product. The picture is of the four molecular orbitals of a diene, just as we discussed in class. It should expand if you click on it. Subscribe to: Post Comments (Atom). Chemistry 241 at DC. Chemistry is the central science. Chemistry 241 at DC. Chemistry is the central science.
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Chemistry 241 at DC
Wednesday, May 02, 2007. Today was the final day of new material and it ended with a bang - the Friedel-Crafts alkylation and acylation reactions. These reactions involve the formation of C-C bond during EAS reactions. The carbon is made electrophilic by the reaction between an alkyl or acyl halide and a trihalo aluminum compound. The acylation is a better reaction (generally) than the alkylation because the resultant C is stabilized by resonance. Tuesday, May 01, 2007. Thursday, April 26, 2007. Today wa...
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