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Blue Bottle, Red and Blue Bottle Color changes are caused by reactions of oxygen in the air with chemicals in a solution. The colors fade over time, but can be regenerated by shaking the flask containing the solution.
Kinetics |
Mechanisms of Reactions |
Oxidation / Reduction
Induction by Iron(II) of the Oxidation of Iodide by Dichromate Acidic aqueous solutions containing dichromate and iodide ions are mixed with no reaction. The addition of a solution of iron(II) ion induces the rapid formation of brown triiodide ion.
the following mechanism has been proposed at high temperatures: (1) NO2 + CO O-N-O-C-O (slow) (2) O-N-O-C-O NO + CO2 (fast) Check the box for each species that is an intermediate in this mechanism.
"It Gets Me to the Product": How Students Propose Organic MechanismsGautam Bhattacharyya and George M. Bodner Because practicing organic chemists use the arrow-pushing formalism in situations that are far removed from the simple contexts in which they are first presented, this study probed how students enrolled in a first-semester, graduate-level organic chemistry course approached the task of writing the mechanisms for two- to four-step reactions that lacked the typical cues that bring common mechanisms to mind. This article focuses on the students' solutions and discusses possible limitations of their strategies. Bhattacharyya, Gautam; Bodner, George M. J. Chem. Educ.2005, 82, 1402.
Mechanisms of Reactions |
Learning Theories |
Constructivism
Organizing Organic Reactions: The Importance of Antibonding OrbitalsDavid E. Lewis It is proposed that unoccupied molecular orbitals arbitrate much organic reactivity, and that they provide the basis for a reactivity-based system for organizing organic reactions. Such a system is proposed for organizing organic reactions according to principles of reactivity, and the system is discussed with examples of the frontier orbitals involved. Lewis, David E. J. Chem. Educ.1999, 76, 1718.
Covalent Bonding |
Mechanisms of Reactions |
MO Theory
Pericyclic Reactions: FMO Approach-Abstract of Issue 9904MAlbert W. M. Lee, C. T. So, C. L. Chan, and Y. K. Wu Pericyclic Reactions: FMO Approach is a program for Macintosh computers in which the frontier molecular orbital approaches to electrocyclic and cycloaddition reactions are animated. The bonding or antibonding interactions of the frontier molecular orbital(s) determine whether the reactions are thermally or photochemically allowed or forbidden. Lee, Albert W. M.; So, C. T.; Chan, C. L.; Wu, Y. K. J. Chem. Educ.1999, 76, 720.
ChemPaths 104 W Feb 23John W. Moore Today in Chem 104:
* Lecture: Mechanisms of Reactions
* Reading:
Kotz, Ch. 15, Sec. 5-6
Moore, Ch. 13, Sec. 6-76
* Homework #5 due by 11:55 pm F Feb 25
* Excel Assignment due in first discussion section this week
* Quiz 4 in second discussion section this week
Mechanisms of Reactions
ChemPaths 104 F Feb 25John W. Moore Today in Chem 104:
* Lecture: Problem-Solving Session
* No assigned reading for today.
* Homework #5 due by 11:55 pm Today!
* Biomolecules Tutorial Enzymes (including Enzymes Quiz)
is due Wed. Mar. 2, at 11:55 pm.
Mechanisms of Reactions
Reaction MechanismsEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
NO + CO2 
