a.) Draw curved arrows for each step of following mechanism. B.) predict outcome of following 4 reactions. If the reaction does not occur write N.R. into box and explain why. Show all intermediates and denote all lone pair electrons, formal charges and countercharges where appropriate. Draw important resonance structures for intermediates. Explain concisely the observed regiochemical control.
Chemists utilize curved-arrow (electron-pushing) notation as a bookkeeping tool to keep track of electron The notation helps in understanding complex reactions, predicting products for an unfamiliar reaction A single-barbed arrow shows the movement of one electron. (Below, all examples utilize...a) In the boxes below, draw the two chair forms of trans-1,4-dimethylcyclohexane. Question 3. For each of the following pairs of compounds, circle the compound that will undergo Question 4. Provide a complete mechanism (curved arrows showing electron movement) for the following reaction.
A reaction mechanism also tells us the relative rates of each step of a chemical reaction. There are three main steps to be followed in determining a reaction mechanism: Design experiments that will reveal details of the chemical reaction, such as its slowest step or the specific bonds that are broken or formed during the process.
q The mechanism of the reaction is the same as for the standard Claisen condensation and is shown below: q This works efficiently because the enolate, once formed, reacts more rapidly with the carbethoxy group in the same molecule (i.e., intramolecularly) than with a carbethoxy group of another molecule (intermolecularly). (b) On your energy diagram, draw a dashed curve to show the reaction progress from reactants to products in the presence of a suitable catalyst for the reaction. (c) On your energy diagram, draw a vertical line segment with a length that corresponds to the activation energy for the reverse un-catalyzed reaction: 2HI(g)→H 2 (g)+I 2 (g).