Deducing the reactants of a Diels-Alder reaction Can the molecule on the right-hand side of this organic reaction be made in good yield from no more than two reactants, in one step, by moderately heating the reactants? O • If your answer is yes, then draw the reactant or reactants in the drawing area below. You can draw the reactants in any arrangement you like. 2 dla

• Q: Calculate the wavelength of the radiation that will be absorbed in promoting an electron from the HOMO to the LUMO in butadiene.

How do we carry out a Diels-Adler reaction in the bottom problem?

Compounds P and Q can undergo a Diels-Alder reaction to form two regioisomeric products R and S as shown in Figure 5. OMe P H C8H1202 R C8H1202 S Figure 5 Draw the chemical structures of regioisomeric compounds R and S. (ii) Using possible resonance contributors of P and Q predict which of the two regioisomers will be favoured in the reaction. (iii) Using curly arrows, draw the mechanism for the reaction of P and Q to form the dominant regioisomer you have predicted in your answer to part (ii) above.

ab 5: Pre-lab Assignment tomework Due in a day 0/3 answered Pre-lab question 2 *** Homework Unanswered The Diels-Alder reaction proceeds through a concerted mechanism. This means that Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a The reaction is exothermic. A ring structure is formed by the reaction. All the bond breaking and forming takes place at the same time with no intermediates. d. Both endo and exo products will be formed. e The diene must be in an s-cis configuration. ASub C.

draw the racemic structures

For our Diels-Alder Reaction lab, they asked to provide heat to the structures and I'm a little unsure of what the products will look like, if you can help, please?

Draw a resonance structure, complete with all formal charges and lone (unshared) electron pairs, that shows the resonance interaction of the cyano with the ortho position in benzonitrile. CEN benzonitrile • You do not have to consider stereochemistry. • Include all valence lone pairs in your answer. • In cases where there is more than one answer, just draw one.

Mechanism The Diels-Alder reaction is part of a class of reactions known as a cycloaddition reaction. This reaction is specifically a [4+2] cycloaddition which is a concerted (one-step) process in which two new carbon - carbon sigma bonds are formed from two pi bonds. For the first Diels - Alder step of the mechanism fill in the arrows needed for the transformation. The rest of the mechanism is drawn for you. OH Show mechanism arrows for this step! 4 + 2 cycloaddition OH H D- & H+ transfer OH Nuc acyl substitution H L.G.

Draw the structure of the product of the Diels-Alder reaction below. H3C CH3 O || O || + CH3OC-CEC-COCH3